[PATCH] I2O: changed I2O API to create I2O messages in kernel memory

Changed the I2O API to create I2O messages first in kernel memory and then
transfer it at once over the PCI bus instead of sending each quad-word over
the PCI bus.

Signed-off-by: Markus Lidel <Markus.Lidel@shadowconnect.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

8 files changed, 412 insertions, 426 deletions

diff --git a/drivers/message/i2o/bus-osm.c b/drivers/message/i2o/bus-osm.c
index 151b228e1cb3..ce039d322fd0 100644
--- a/drivers/message/i2o/bus-osm.c
+++ b/drivers/message/i2o/bus-osm.c
@@ -39,18 +39,18 @@ static struct i2o_class_id i2o_bus_class_id[] = {
  */
 static int i2o_bus_scan(struct i2o_device *dev)
 {
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
 
-        m = i2o_msg_get_wait(dev->iop, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
+        msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
                 return -ETIMEDOUT;
 
-        writel(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_BUS_SCAN << 24 | HOST_TID << 12 | dev->lct_data.tid,
-               &msg->u.head[1]);
+        msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_BUS_SCAN << 24 | HOST_TID << 12 | dev->lct_data.
+                        tid);
 
-        return i2o_msg_post_wait(dev->iop, m, 60);
+        return i2o_msg_post_wait(dev->iop, msg, 60);
 };
 
 /**
@@ -59,8 +59,9 @@ static int i2o_bus_scan(struct i2o_device *dev)
  *
  *      Returns count.
  */
-static ssize_t i2o_bus_store_scan(struct device *d, struct device_attribute *attr, const char *buf,
-                                  size_t count)
+static ssize_t i2o_bus_store_scan(struct device *d,
+                                  struct device_attribute *attr,
+                                  const char *buf, size_t count)
 {
         struct i2o_device *i2o_dev = to_i2o_device(d);
         int rc;
diff --git a/drivers/message/i2o/device.c b/drivers/message/i2o/device.c
index 8eb50cdb8ae1..002ae0ed8966 100644
--- a/drivers/message/i2o/device.c
+++ b/drivers/message/i2o/device.c
@@ -35,18 +35,18 @@
 static inline int i2o_device_issue_claim(struct i2o_device *dev, u32 cmd,
                                          u32 type)
 {
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
 
-        m = i2o_msg_get_wait(dev->iop, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
+        msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
-        writel(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(cmd << 24 | HOST_TID << 12 | dev->lct_data.tid, &msg->u.head[1]);
-        writel(type, &msg->body[0]);
+        msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+                cpu_to_le32(cmd << 24 | HOST_TID << 12 | dev->lct_data.tid);
+        msg->body[0] = cpu_to_le32(type);
 
-        return i2o_msg_post_wait(dev->iop, m, 60);
+        return i2o_msg_post_wait(dev->iop, msg, 60);
 }
 
 /**
@@ -419,10 +419,9 @@ int i2o_device_parse_lct(struct i2o_controller *c)
  *      ResultCount, ErrorInfoSize, BlockStatus and BlockSize.
  */
 int i2o_parm_issue(struct i2o_device *i2o_dev, int cmd, void *oplist,
-                          int oplen, void *reslist, int reslen)
+                   int oplen, void *reslist, int reslen)
 {
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         u32 *res32 = (u32 *) reslist;
         u32 *restmp = (u32 *) reslist;
         int len = 0;
@@ -437,26 +436,28 @@ int i2o_parm_issue(struct i2o_device *i2o_dev, int cmd, void *oplist,
         if (i2o_dma_alloc(dev, &res, reslen, GFP_KERNEL))
                 return -ENOMEM;
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY) {
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg)) {
                 i2o_dma_free(dev, &res);
-                return -ETIMEDOUT;
+                return PTR_ERR(msg);
         }
 
         i = 0;
-        writel(cmd << 24 | HOST_TID << 12 | i2o_dev->lct_data.tid,
-               &msg->u.head[1]);
-        writel(0, &msg->body[i++]);
-        writel(0x4C000000 | oplen, &msg->body[i++]);    /* OperationList */
-        memcpy_toio(&msg->body[i], oplist, oplen);
+        msg->u.head[1] =
+            cpu_to_le32(cmd << 24 | HOST_TID << 12 | i2o_dev->lct_data.tid);
+        msg->body[i++] = cpu_to_le32(0x00000000);
+        msg->body[i++] = cpu_to_le32(0x4C000000 | oplen);       /* OperationList */
+        memcpy(&msg->body[i], oplist, oplen);
+
         i += (oplen / 4 + (oplen % 4 ? 1 : 0));
-        writel(0xD0000000 | res.len, &msg->body[i++]);  /* ResultList */
-        writel(res.phys, &msg->body[i++]);
+        msg->body[i++] = cpu_to_le32(0xD0000000 | res.len);     /* ResultList */
+        msg->body[i++] = cpu_to_le32(res.phys);
 
-        writel(I2O_MESSAGE_SIZE(i + sizeof(struct i2o_message) / 4) |
-               SGL_OFFSET_5, &msg->u.head[0]);
+        msg->u.head[0] =
+            cpu_to_le32(I2O_MESSAGE_SIZE(i + sizeof(struct i2o_message) / 4) |
+                        SGL_OFFSET_5);
 
-        rc = i2o_msg_post_wait_mem(c, m, 10, &res);
+        rc = i2o_msg_post_wait_mem(c, msg, 10, &res);
 
         /* This only looks like a memory leak - don't "fix" it. */
         if (rc == -ETIMEDOUT)
diff --git a/drivers/message/i2o/exec-osm.c b/drivers/message/i2o/exec-osm.c
index 9c339a2505b0..71a09332e7c0 100644
--- a/drivers/message/i2o/exec-osm.c
+++ b/drivers/message/i2o/exec-osm.c
@@ -114,13 +114,12 @@ static void i2o_exec_wait_free(struct i2o_exec_wait *wait)
  *      Returns 0 on success, negative error code on timeout or positive error
  *      code from reply.
  */
-int i2o_msg_post_wait_mem(struct i2o_controller *c, u32 m, unsigned long
-                          timeout, struct i2o_dma *dma)
+int i2o_msg_post_wait_mem(struct i2o_controller *c, struct i2o_message *msg,
+                          unsigned long timeout, struct i2o_dma *dma)
 {
         DECLARE_WAIT_QUEUE_HEAD(wq);
         struct i2o_exec_wait *wait;
         static u32 tcntxt = 0x80000000;
-        struct i2o_message __iomem *msg = i2o_msg_in_to_virt(c, m);
         int rc = 0;
 
         wait = i2o_exec_wait_alloc();
@@ -138,15 +137,15 @@ int i2o_msg_post_wait_mem(struct i2o_controller *c, u32 m, unsigned long
          * We will only use transaction contexts >= 0x80000000 for POST WAIT,
          * so we could find a POST WAIT reply easier in the reply handler.
          */
-        writel(i2o_exec_driver.context, &msg->u.s.icntxt);
+        msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context);
         wait->tcntxt = tcntxt++;
-        writel(wait->tcntxt, &msg->u.s.tcntxt);
+        msg->u.s.tcntxt = cpu_to_le32(wait->tcntxt);
 
         /*
          * Post the message to the controller. At some point later it will
          * return. If we time out before it returns then complete will be zero.
          */
-        i2o_msg_post(c, m);
+        i2o_msg_post(c, msg);
 
         if (!wait->complete) {
                 wait->wq = &wq;
@@ -266,7 +265,8 @@ static int i2o_msg_post_wait_complete(struct i2o_controller *c, u32 m,
  *
  *      Returns number of bytes printed into buffer.
  */
-static ssize_t i2o_exec_show_vendor_id(struct device *d, struct device_attribute *attr, char *buf)
+static ssize_t i2o_exec_show_vendor_id(struct device *d,
+                                       struct device_attribute *attr, char *buf)
 {
         struct i2o_device *dev = to_i2o_device(d);
         u16 id;
@@ -286,7 +286,9 @@ static ssize_t i2o_exec_show_vendor_id(struct device *d, struct device_attribute
  *
  *      Returns number of bytes printed into buffer.
  */
-static ssize_t i2o_exec_show_product_id(struct device *d, struct device_attribute *attr, char *buf)
+static ssize_t i2o_exec_show_product_id(struct device *d,
+                                        struct device_attribute *attr,
+                                        char *buf)
 {
         struct i2o_device *dev = to_i2o_device(d);
         u16 id;
@@ -385,23 +387,22 @@ static int i2o_exec_reply(struct i2o_controller *c, u32 m,
         u32 context;
 
         if (le32_to_cpu(msg->u.head[0]) & MSG_FAIL) {
+                struct i2o_message __iomem *pmsg;
+                u32 pm;
+
                 /*
                  * If Fail bit is set we must take the transaction context of
                  * the preserved message to find the right request again.
                  */
-                struct i2o_message __iomem *pmsg;
-                u32 pm;
 
                 pm = le32_to_cpu(msg->body[3]);
-
                 pmsg = i2o_msg_in_to_virt(c, pm);
+                context = readl(&pmsg->u.s.tcntxt);
 
                 i2o_report_status(KERN_INFO, "i2o_core", msg);
 
-                context = readl(&pmsg->u.s.tcntxt);
-
                 /* Release the preserved msg */
-                i2o_msg_nop(c, pm);
+                i2o_msg_nop_mfa(c, pm);
         } else
                 context = le32_to_cpu(msg->u.s.tcntxt);
 
@@ -462,25 +463,26 @@ static void i2o_exec_event(struct i2o_event *evt)
  */
 int i2o_exec_lct_get(struct i2o_controller *c)
 {
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         int i = 0;
         int rc = -EAGAIN;
 
         for (i = 1; i <= I2O_LCT_GET_TRIES; i++) {
-                m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-                if (m == I2O_QUEUE_EMPTY)
-                        return -ETIMEDOUT;
-
-                writel(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6, &msg->u.head[0]);
-                writel(I2O_CMD_LCT_NOTIFY << 24 | HOST_TID << 12 | ADAPTER_TID,
-                       &msg->u.head[1]);
-                writel(0xffffffff, &msg->body[0]);
-                writel(0x00000000, &msg->body[1]);
-                writel(0xd0000000 | c->dlct.len, &msg->body[2]);
-                writel(c->dlct.phys, &msg->body[3]);
-
-                rc = i2o_msg_post_wait(c, m, I2O_TIMEOUT_LCT_GET);
+                msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+                if (IS_ERR(msg))
+                        return PTR_ERR(msg);
+
+                msg->u.head[0] =
+                    cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6);
+                msg->u.head[1] =
+                    cpu_to_le32(I2O_CMD_LCT_NOTIFY << 24 | HOST_TID << 12 |
+                                ADAPTER_TID);
+                msg->body[0] = cpu_to_le32(0xffffffff);
+                msg->body[1] = cpu_to_le32(0x00000000);
+                msg->body[2] = cpu_to_le32(0xd0000000 | c->dlct.len);
+                msg->body[3] = cpu_to_le32(c->dlct.phys);
+
+                rc = i2o_msg_post_wait(c, msg, I2O_TIMEOUT_LCT_GET);
                 if (rc < 0)
                         break;
 
@@ -506,29 +508,28 @@ static int i2o_exec_lct_notify(struct i2o_controller *c, u32 change_ind)
 {
         i2o_status_block *sb = c->status_block.virt;
         struct device *dev;
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
 
         dev = &c->pdev->dev;
 
         if (i2o_dma_realloc(dev, &c->dlct, sb->expected_lct_size, GFP_KERNEL))
                 return -ENOMEM;
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
-
-        writel(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6, &msg->u.head[0]);
-        writel(I2O_CMD_LCT_NOTIFY << 24 | HOST_TID << 12 | ADAPTER_TID,
-               &msg->u.head[1]);
-        writel(i2o_exec_driver.context, &msg->u.s.icntxt);
-        writel(0, &msg->u.s.tcntxt);    /* FIXME */
-        writel(0xffffffff, &msg->body[0]);
-        writel(change_ind, &msg->body[1]);
-        writel(0xd0000000 | c->dlct.len, &msg->body[2]);
-        writel(c->dlct.phys, &msg->body[3]);
-
-        i2o_msg_post(c, m);
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
+
+        msg->u.head[0] = cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6);
+        msg->u.head[1] = cpu_to_le32(I2O_CMD_LCT_NOTIFY << 24 | HOST_TID << 12 |
+                                     ADAPTER_TID);
+        msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context);
+        msg->u.s.tcntxt = cpu_to_le32(0x00000000);
+        msg->body[0] = cpu_to_le32(0xffffffff);
+        msg->body[1] = cpu_to_le32(change_ind);
+        msg->body[2] = cpu_to_le32(0xd0000000 | c->dlct.len);
+        msg->body[3] = cpu_to_le32(c->dlct.phys);
+
+        i2o_msg_post(c, msg);
 
         return 0;
 };
diff --git a/drivers/message/i2o/i2o_block.c b/drivers/message/i2o/i2o_block.c
index f283b5bafdd3..2bd15c70773b 100644
--- a/drivers/message/i2o/i2o_block.c
+++ b/drivers/message/i2o/i2o_block.c
@@ -130,20 +130,20 @@ static int i2o_block_remove(struct device *dev)
  */
 static int i2o_block_device_flush(struct i2o_device *dev)
 {
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
 
-        m = i2o_msg_get_wait(dev->iop, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
+        msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
-        writel(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_BLOCK_CFLUSH << 24 | HOST_TID << 12 | dev->lct_data.tid,
-               &msg->u.head[1]);
-        writel(60 << 16, &msg->body[0]);
+        msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_BLOCK_CFLUSH << 24 | HOST_TID << 12 | dev->
+                        lct_data.tid);
+        msg->body[0] = cpu_to_le32(60 << 16);
         osm_debug("Flushing...\n");
 
-        return i2o_msg_post_wait(dev->iop, m, 60);
+        return i2o_msg_post_wait(dev->iop, msg, 60);
 };
 
 /**
@@ -181,21 +181,21 @@ static int i2o_block_issue_flush(request_queue_t * queue, struct gendisk *disk,
  */
 static int i2o_block_device_mount(struct i2o_device *dev, u32 media_id)
 {
-        struct i2o_message __iomem *msg;
-        u32 m;
-
-        m = i2o_msg_get_wait(dev->iop, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
-
-        writel(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_BLOCK_MMOUNT << 24 | HOST_TID << 12 | dev->lct_data.tid,
-               &msg->u.head[1]);
-        writel(-1, &msg->body[0]);
-        writel(0, &msg->body[1]);
+        struct i2o_message *msg;
+
+        msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
+
+        msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_BLOCK_MMOUNT << 24 | HOST_TID << 12 | dev->
+                        lct_data.tid);
+        msg->body[0] = cpu_to_le32(-1);
+        msg->body[1] = cpu_to_le32(0x00000000);
         osm_debug("Mounting...\n");
 
-        return i2o_msg_post_wait(dev->iop, m, 2);
+        return i2o_msg_post_wait(dev->iop, msg, 2);
 };
 
 /**
@@ -210,20 +210,20 @@ static int i2o_block_device_mount(struct i2o_device *dev, u32 media_id)
  */
 static int i2o_block_device_lock(struct i2o_device *dev, u32 media_id)
 {
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
 
-        m = i2o_msg_get_wait(dev->iop, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
+        msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg) == I2O_QUEUE_EMPTY)
+                return PTR_ERR(msg);
 
-        writel(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_BLOCK_MLOCK << 24 | HOST_TID << 12 | dev->lct_data.tid,
-               &msg->u.head[1]);
-        writel(-1, &msg->body[0]);
+        msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_BLOCK_MLOCK << 24 | HOST_TID << 12 | dev->
+                        lct_data.tid);
+        msg->body[0] = cpu_to_le32(-1);
         osm_debug("Locking...\n");
 
-        return i2o_msg_post_wait(dev->iop, m, 2);
+        return i2o_msg_post_wait(dev->iop, msg, 2);
 };
 
 /**
@@ -238,20 +238,20 @@ static int i2o_block_device_lock(struct i2o_device *dev, u32 media_id)
  */
 static int i2o_block_device_unlock(struct i2o_device *dev, u32 media_id)
 {
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
 
-        m = i2o_msg_get_wait(dev->iop, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
+        msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
-        writel(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_BLOCK_MUNLOCK << 24 | HOST_TID << 12 | dev->lct_data.tid,
-               &msg->u.head[1]);
-        writel(media_id, &msg->body[0]);
+        msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_BLOCK_MUNLOCK << 24 | HOST_TID << 12 | dev->
+                        lct_data.tid);
+        msg->body[0] = cpu_to_le32(media_id);
         osm_debug("Unlocking...\n");
 
-        return i2o_msg_post_wait(dev->iop, m, 2);
+        return i2o_msg_post_wait(dev->iop, msg, 2);
 };
 
 /**
@@ -267,21 +267,21 @@ static int i2o_block_device_power(struct i2o_block_device *dev, u8 op)
 {
         struct i2o_device *i2o_dev = dev->i2o_dev;
         struct i2o_controller *c = i2o_dev->iop;
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         int rc;
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
-        writel(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_BLOCK_POWER << 24 | HOST_TID << 12 | i2o_dev->lct_data.
-               tid, &msg->u.head[1]);
-        writel(op << 24, &msg->body[0]);
+        msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_BLOCK_POWER << 24 | HOST_TID << 12 | i2o_dev->
+                        lct_data.tid);
+        msg->body[0] = cpu_to_le32(op << 24);
         osm_debug("Power...\n");
 
-        rc = i2o_msg_post_wait(c, m, 60);
+        rc = i2o_msg_post_wait(c, msg, 60);
         if (!rc)
                 dev->power = op;
 
@@ -331,7 +331,7 @@ static inline void i2o_block_request_free(struct i2o_block_request *ireq)
  */
 static inline int i2o_block_sglist_alloc(struct i2o_controller *c,
                                          struct i2o_block_request *ireq,
-                                         u32 __iomem ** mptr)
+                                         u32 ** mptr)
 {
         int nents;
         enum dma_data_direction direction;
@@ -745,10 +745,9 @@ static int i2o_block_transfer(struct request *req)
         struct i2o_block_device *dev = req->rq_disk->private_data;
         struct i2o_controller *c;
         int tid = dev->i2o_dev->lct_data.tid;
-        struct i2o_message __iomem *msg;
-        u32 __iomem *mptr;
+        struct i2o_message *msg;
+        u32 *mptr;
         struct i2o_block_request *ireq = req->special;
-        u32 m;
         u32 tcntxt;
         u32 sgl_offset = SGL_OFFSET_8;
         u32 ctl_flags = 0x00000000;
@@ -763,9 +762,9 @@ static int i2o_block_transfer(struct request *req)
 
         c = dev->i2o_dev->iop;
 
-        m = i2o_msg_get(c, &msg);
-        if (m == I2O_QUEUE_EMPTY) {
-                rc = -EBUSY;
+        msg = i2o_msg_get(c);
+        if (IS_ERR(msg)) {
+                rc = PTR_ERR(msg);
                 goto exit;
         }
 
@@ -775,8 +774,8 @@ static int i2o_block_transfer(struct request *req)
                 goto nop_msg;
         }
 
-        writel(i2o_block_driver.context, &msg->u.s.icntxt);
-        writel(tcntxt, &msg->u.s.tcntxt);
+        msg->u.s.icntxt = cpu_to_le32(i2o_block_driver.context);
+        msg->u.s.tcntxt = cpu_to_le32(tcntxt);
 
         mptr = &msg->body[0];
 
@@ -834,11 +833,11 @@ static int i2o_block_transfer(struct request *req)
 
                 sgl_offset = SGL_OFFSET_12;
 
-                writel(I2O_CMD_PRIVATE << 24 | HOST_TID << 12 | tid,
-                       &msg->u.head[1]);
+                msg->u.head[1] =
+                    cpu_to_le32(I2O_CMD_PRIVATE << 24 | HOST_TID << 12 | tid);
 
-                writel(I2O_VENDOR_DPT << 16 | I2O_CMD_SCSI_EXEC, mptr++);
-                writel(tid, mptr++);
+                *mptr++ = cpu_to_le32(I2O_VENDOR_DPT << 16 | I2O_CMD_SCSI_EXEC);
+                *mptr++ = cpu_to_le32(tid);
 
                 /*
                  * ENABLE_DISCONNECT
@@ -853,22 +852,24 @@ static int i2o_block_transfer(struct request *req)
                         scsi_flags = 0xa0a0000a;
                 }
 
-                writel(scsi_flags, mptr++);
+                *mptr++ = cpu_to_le32(scsi_flags);
 
                 *((u32 *) & cmd[2]) = cpu_to_be32(req->sector * hwsec);
                 *((u16 *) & cmd[7]) = cpu_to_be16(req->nr_sectors * hwsec);
 
-                memcpy_toio(mptr, cmd, 10);
+                memcpy(mptr, cmd, 10);
                 mptr += 4;
-                writel(req->nr_sectors << KERNEL_SECTOR_SHIFT, mptr++);
+                *mptr++ = cpu_to_le32(req->nr_sectors << KERNEL_SECTOR_SHIFT);
         } else
 #endif
         {
-                writel(cmd | HOST_TID << 12 | tid, &msg->u.head[1]);
-                writel(ctl_flags, mptr++);
-                writel(req->nr_sectors << KERNEL_SECTOR_SHIFT, mptr++);
-                writel((u32) (req->sector << KERNEL_SECTOR_SHIFT), mptr++);
-                writel(req->sector >> (32 - KERNEL_SECTOR_SHIFT), mptr++);
+                msg->u.head[1] = cpu_to_le32(cmd | HOST_TID << 12 | tid);
+                *mptr++ = cpu_to_le32(ctl_flags);
+                *mptr++ = cpu_to_le32(req->nr_sectors << KERNEL_SECTOR_SHIFT);
+                *mptr++ =
+                    cpu_to_le32((u32) (req->sector << KERNEL_SECTOR_SHIFT));
+                *mptr++ =
+                    cpu_to_le32(req->sector >> (32 - KERNEL_SECTOR_SHIFT));
         }
 
         if (!i2o_block_sglist_alloc(c, ireq, &mptr)) {
@@ -876,13 +877,13 @@ static int i2o_block_transfer(struct request *req)
                 goto context_remove;
         }
 
-        writel(I2O_MESSAGE_SIZE(mptr - &msg->u.head[0]) |
-               sgl_offset, &msg->u.head[0]);
+        msg->u.head[0] =
+            cpu_to_le32(I2O_MESSAGE_SIZE(mptr - &msg->u.head[0]) | sgl_offset);
 
         list_add_tail(&ireq->queue, &dev->open_queue);
         dev->open_queue_depth++;
 
-        i2o_msg_post(c, m);
+        i2o_msg_post(c, msg);
 
         return 0;
 
@@ -890,7 +891,7 @@ static int i2o_block_transfer(struct request *req)
         i2o_cntxt_list_remove(c, req);
 
       nop_msg:
-        i2o_msg_nop(c, m);
+        i2o_msg_nop(c, msg);
 
       exit:
         return rc;
diff --git a/drivers/message/i2o/i2o_config.c b/drivers/message/i2o/i2o_config.c
index 3c3a7abebb1b..4fe73d628c5b 100644
--- a/drivers/message/i2o/i2o_config.c
+++ b/drivers/message/i2o/i2o_config.c
@@ -230,8 +230,7 @@ static int i2o_cfg_swdl(unsigned long arg)
         struct i2o_sw_xfer __user *pxfer = (struct i2o_sw_xfer __user *)arg;
         unsigned char maxfrag = 0, curfrag = 1;
         struct i2o_dma buffer;
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         unsigned int status = 0, swlen = 0, fragsize = 8192;
         struct i2o_controller *c;
 
@@ -257,31 +256,34 @@ static int i2o_cfg_swdl(unsigned long arg)
         if (!c)
                 return -ENXIO;
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -EBUSY;
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
         if (i2o_dma_alloc(&c->pdev->dev, &buffer, fragsize, GFP_KERNEL)) {
-                i2o_msg_nop(c, m);
+                i2o_msg_nop(c, msg);
                 return -ENOMEM;
         }
 
         __copy_from_user(buffer.virt, kxfer.buf, fragsize);
 
-        writel(NINE_WORD_MSG_SIZE | SGL_OFFSET_7, &msg->u.head[0]);
-        writel(I2O_CMD_SW_DOWNLOAD << 24 | HOST_TID << 12 | ADAPTER_TID,
-               &msg->u.head[1]);
-        writel(i2o_config_driver.context, &msg->u.head[2]);
-        writel(0, &msg->u.head[3]);
-        writel((((u32) kxfer.flags) << 24) | (((u32) kxfer.sw_type) << 16) |
-               (((u32) maxfrag) << 8) | (((u32) curfrag)), &msg->body[0]);
-        writel(swlen, &msg->body[1]);
-        writel(kxfer.sw_id, &msg->body[2]);
-        writel(0xD0000000 | fragsize, &msg->body[3]);
-        writel(buffer.phys, &msg->body[4]);
+        msg->u.head[0] = cpu_to_le32(NINE_WORD_MSG_SIZE | SGL_OFFSET_7);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_SW_DOWNLOAD << 24 | HOST_TID << 12 |
+                        ADAPTER_TID);
+        msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
+        msg->u.head[3] = cpu_to_le32(0);
+        msg->body[0] =
+            cpu_to_le32((((u32) kxfer.flags) << 24) | (((u32) kxfer.
+                                                        sw_type) << 16) |
+                        (((u32) maxfrag) << 8) | (((u32) curfrag)));
+        msg->body[1] = cpu_to_le32(swlen);
+        msg->body[2] = cpu_to_le32(kxfer.sw_id);
+        msg->body[3] = cpu_to_le32(0xD0000000 | fragsize);
+        msg->body[4] = cpu_to_le32(buffer.phys);
 
         osm_debug("swdl frag %d/%d (size %d)\n", curfrag, maxfrag, fragsize);
-        status = i2o_msg_post_wait_mem(c, m, 60, &buffer);
+        status = i2o_msg_post_wait_mem(c, msg, 60, &buffer);
 
         if (status != -ETIMEDOUT)
                 i2o_dma_free(&c->pdev->dev, &buffer);
@@ -302,8 +304,7 @@ static int i2o_cfg_swul(unsigned long arg)
         struct i2o_sw_xfer __user *pxfer = (struct i2o_sw_xfer __user *)arg;
         unsigned char maxfrag = 0, curfrag = 1;
         struct i2o_dma buffer;
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         unsigned int status = 0, swlen = 0, fragsize = 8192;
         struct i2o_controller *c;
         int ret = 0;
@@ -330,30 +331,30 @@ static int i2o_cfg_swul(unsigned long arg)
         if (!c)
                 return -ENXIO;
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -EBUSY;
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
         if (i2o_dma_alloc(&c->pdev->dev, &buffer, fragsize, GFP_KERNEL)) {
-                i2o_msg_nop(c, m);
+                i2o_msg_nop(c, msg);
                 return -ENOMEM;
         }
 
-        writel(NINE_WORD_MSG_SIZE | SGL_OFFSET_7, &msg->u.head[0]);
-        writel(I2O_CMD_SW_UPLOAD << 24 | HOST_TID << 12 | ADAPTER_TID,
-               &msg->u.head[1]);
-        writel(i2o_config_driver.context, &msg->u.head[2]);
-        writel(0, &msg->u.head[3]);
-        writel((u32) kxfer.flags << 24 | (u32) kxfer.
-               sw_type << 16 | (u32) maxfrag << 8 | (u32) curfrag,
-               &msg->body[0]);
-        writel(swlen, &msg->body[1]);
-        writel(kxfer.sw_id, &msg->body[2]);
-        writel(0xD0000000 | fragsize, &msg->body[3]);
-        writel(buffer.phys, &msg->body[4]);
+        msg->u.head[0] = cpu_to_le32(NINE_WORD_MSG_SIZE | SGL_OFFSET_7);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_SW_UPLOAD << 24 | HOST_TID << 12 | ADAPTER_TID);
+        msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
+        msg->u.head[3] = cpu_to_le32(0);
+        msg->body[0] =
+            cpu_to_le32((u32) kxfer.flags << 24 | (u32) kxfer.
+                        sw_type << 16 | (u32) maxfrag << 8 | (u32) curfrag);
+        msg->body[1] = cpu_to_le32(swlen);
+        msg->body[2] = cpu_to_le32(kxfer.sw_id);
+        msg->body[3] = cpu_to_le32(0xD0000000 | fragsize);
+        msg->body[4] = cpu_to_le32(buffer.phys);
 
         osm_debug("swul frag %d/%d (size %d)\n", curfrag, maxfrag, fragsize);
-        status = i2o_msg_post_wait_mem(c, m, 60, &buffer);
+        status = i2o_msg_post_wait_mem(c, msg, 60, &buffer);
 
         if (status != I2O_POST_WAIT_OK) {
                 if (status != -ETIMEDOUT)
@@ -380,8 +381,7 @@ static int i2o_cfg_swdel(unsigned long arg)
         struct i2o_controller *c;
         struct i2o_sw_xfer kxfer;
         struct i2o_sw_xfer __user *pxfer = (struct i2o_sw_xfer __user *)arg;
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         unsigned int swlen;
         int token;
 
@@ -395,21 +395,21 @@ static int i2o_cfg_swdel(unsigned long arg)
         if (!c)
                 return -ENXIO;
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -EBUSY;
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
-        writel(SEVEN_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_SW_REMOVE << 24 | HOST_TID << 12 | ADAPTER_TID,
-               &msg->u.head[1]);
-        writel(i2o_config_driver.context, &msg->u.head[2]);
-        writel(0, &msg->u.head[3]);
-        writel((u32) kxfer.flags << 24 | (u32) kxfer.sw_type << 16,
-               &msg->body[0]);
-        writel(swlen, &msg->body[1]);
-        writel(kxfer.sw_id, &msg->body[2]);
+        msg->u.head[0] = cpu_to_le32(SEVEN_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_SW_REMOVE << 24 | HOST_TID << 12 | ADAPTER_TID);
+        msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
+        msg->u.head[3] = cpu_to_le32(0);
+        msg->body[0] =
+            cpu_to_le32((u32) kxfer.flags << 24 | (u32) kxfer.sw_type << 16);
+        msg->body[1] = cpu_to_le32(swlen);
+        msg->body[2] = cpu_to_le32(kxfer.sw_id);
 
-        token = i2o_msg_post_wait(c, m, 10);
+        token = i2o_msg_post_wait(c, msg, 10);
 
         if (token != I2O_POST_WAIT_OK) {
                 osm_info("swdel failed, DetailedStatus = %d\n", token);
@@ -423,25 +423,24 @@ static int i2o_cfg_validate(unsigned long arg)
 {
         int token;
         int iop = (int)arg;
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         struct i2o_controller *c;
 
         c = i2o_find_iop(iop);
         if (!c)
                 return -ENXIO;
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -EBUSY;
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
-        writel(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_CONFIG_VALIDATE << 24 | HOST_TID << 12 | iop,
-               &msg->u.head[1]);
-        writel(i2o_config_driver.context, &msg->u.head[2]);
-        writel(0, &msg->u.head[3]);
+        msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_CONFIG_VALIDATE << 24 | HOST_TID << 12 | iop);
+        msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
+        msg->u.head[3] = cpu_to_le32(0);
 
-        token = i2o_msg_post_wait(c, m, 10);
+        token = i2o_msg_post_wait(c, msg, 10);
 
         if (token != I2O_POST_WAIT_OK) {
                 osm_info("Can't validate configuration, ErrorStatus = %d\n",
@@ -454,8 +453,7 @@ static int i2o_cfg_validate(unsigned long arg)
 
 static int i2o_cfg_evt_reg(unsigned long arg, struct file *fp)
 {
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         struct i2o_evt_id __user *pdesc = (struct i2o_evt_id __user *)arg;
         struct i2o_evt_id kdesc;
         struct i2o_controller *c;
@@ -474,18 +472,19 @@ static int i2o_cfg_evt_reg(unsigned long arg, struct file *fp)
         if (!d)
                 return -ENODEV;
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -EBUSY;
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
-        writel(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_UTIL_EVT_REGISTER << 24 | HOST_TID << 12 | kdesc.tid,
-               &msg->u.head[1]);
-        writel(i2o_config_driver.context, &msg->u.head[2]);
-        writel(i2o_cntxt_list_add(c, fp->private_data), &msg->u.head[3]);
-        writel(kdesc.evt_mask, &msg->body[0]);
+        msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_UTIL_EVT_REGISTER << 24 | HOST_TID << 12 |
+                        kdesc.tid);
+        msg->u.head[2] = cpu_to_le32(i2o_config_driver.context);
+        msg->u.head[3] = cpu_to_le32(i2o_cntxt_list_add(c, fp->private_data));
+        msg->body[0] = cpu_to_le32(kdesc.evt_mask);
 
-        i2o_msg_post(c, m);
+        i2o_msg_post(c, msg);
 
         return 0;
 }
@@ -537,7 +536,6 @@ static int i2o_cfg_passthru32(struct file *file, unsigned cmnd,
         u32 sg_index = 0;
         i2o_status_block *sb;
         struct i2o_message *msg;
-        u32 m;
         unsigned int iop;
 
         cmd = (struct i2o_cmd_passthru32 __user *)arg;
@@ -553,7 +551,7 @@ static int i2o_cfg_passthru32(struct file *file, unsigned cmnd,
                 return -ENXIO;
         }
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
 
         sb = c->status_block.virt;
 
@@ -595,8 +593,8 @@ static int i2o_cfg_passthru32(struct file *file, unsigned cmnd,
 
         sg_offset = (msg->u.head[0] >> 4) & 0x0f;
 
-        writel(i2o_config_driver.context, &msg->u.s.icntxt);
-        writel(i2o_cntxt_list_add(c, reply), &msg->u.s.tcntxt);
+        msg->u.s.icntxt = cpu_to_le32(i2o_config_driver.context);
+        msg->u.s.tcntxt = cpu_to_le32(i2o_cntxt_list_add(c, reply));
 
         memset(sg_list, 0, sizeof(sg_list[0]) * SG_TABLESIZE);
         if (sg_offset) {
@@ -662,7 +660,7 @@ static int i2o_cfg_passthru32(struct file *file, unsigned cmnd,
                 }
         }
 
-        rcode = i2o_msg_post_wait(c, m, 60);
+        rcode = i2o_msg_post_wait(c, msg, 60);
         if (rcode)
                 goto sg_list_cleanup;
 
@@ -780,8 +778,7 @@ static int i2o_cfg_passthru(unsigned long arg)
         u32 i = 0;
         void *p = NULL;
         i2o_status_block *sb;
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         unsigned int iop;
 
         if (get_user(iop, &cmd->iop) || get_user(user_msg, &cmd->msg))
@@ -793,7 +790,7 @@ static int i2o_cfg_passthru(unsigned long arg)
                 return -ENXIO;
         }
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
 
         sb = c->status_block.virt;
 
@@ -830,8 +827,8 @@ static int i2o_cfg_passthru(unsigned long arg)
 
         sg_offset = (msg->u.head[0] >> 4) & 0x0f;
 
-        writel(i2o_config_driver.context, &msg->u.s.icntxt);
-        writel(i2o_cntxt_list_add(c, reply), &msg->u.s.tcntxt);
+        msg->u.s.icntxt = cpu_to_le32(i2o_config_driver.context);
+        msg->u.s.tcntxt = cpu_to_le32(i2o_cntxt_list_add(c, reply));
 
         memset(sg_list, 0, sizeof(sg_list[0]) * SG_TABLESIZE);
         if (sg_offset) {
@@ -894,7 +891,7 @@ static int i2o_cfg_passthru(unsigned long arg)
                 }
         }
 
-        rcode = i2o_msg_post_wait(c, m, 60);
+        rcode = i2o_msg_post_wait(c, msg, 60);
         if (rcode)
                 goto sg_list_cleanup;
 
diff --git a/drivers/message/i2o/i2o_scsi.c b/drivers/message/i2o/i2o_scsi.c
index 9f1744c3933b..7a784fd60804 100644
--- a/drivers/message/i2o/i2o_scsi.c
+++ b/drivers/message/i2o/i2o_scsi.c
@@ -510,8 +510,7 @@ static int i2o_scsi_queuecommand(struct scsi_cmnd *SCpnt,
         struct i2o_controller *c;
         struct i2o_device *i2o_dev;
         int tid;
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         /*
          * ENABLE_DISCONNECT
          * SIMPLE_TAG
@@ -519,7 +518,7 @@ static int i2o_scsi_queuecommand(struct scsi_cmnd *SCpnt,
          */
         u32 scsi_flags = 0x20a00000;
         u32 sgl_offset;
-        u32 __iomem *mptr;
+        u32 *mptr;
         u32 cmd = I2O_CMD_SCSI_EXEC << 24;
         int rc = 0;
 
@@ -576,8 +575,8 @@ static int i2o_scsi_queuecommand(struct scsi_cmnd *SCpnt,
          *      throw it back to the scsi layer
          */
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY) {
+        msg = i2o_msg_get(c);
+        if (IS_ERR(msg)) {
                 rc = SCSI_MLQUEUE_HOST_BUSY;
                 goto exit;
         }
@@ -617,16 +616,16 @@ static int i2o_scsi_queuecommand(struct scsi_cmnd *SCpnt,
                 if (sgl_offset == SGL_OFFSET_10)
                         sgl_offset = SGL_OFFSET_12;
                 cmd = I2O_CMD_PRIVATE << 24;
-                writel(I2O_VENDOR_DPT << 16 | I2O_CMD_SCSI_EXEC, mptr++);
-                writel(adpt_flags | tid, mptr++);
+                *mptr++ = cpu_to_le32(I2O_VENDOR_DPT << 16 | I2O_CMD_SCSI_EXEC);
+                *mptr++ = cpu_to_le32(adpt_flags | tid);
         }
 #endif
 
-        writel(cmd | HOST_TID << 12 | tid, &msg->u.head[1]);
-        writel(i2o_scsi_driver.context, &msg->u.s.icntxt);
+        msg->u.head[1] = cpu_to_le32(cmd | HOST_TID << 12 | tid);
+        msg->u.s.icntxt = cpu_to_le32(i2o_scsi_driver.context);
 
         /* We want the SCSI control block back */
-        writel(i2o_cntxt_list_add(c, SCpnt), &msg->u.s.tcntxt);
+        msg->u.s.tcntxt = cpu_to_le32(i2o_cntxt_list_add(c, SCpnt));
 
         /* LSI_920_PCI_QUIRK
          *
@@ -649,15 +648,15 @@ static int i2o_scsi_queuecommand(struct scsi_cmnd *SCpnt,
            }
          */
 
-        writel(scsi_flags | SCpnt->cmd_len, mptr++);
+        *mptr++ = cpu_to_le32(scsi_flags | SCpnt->cmd_len);
 
         /* Write SCSI command into the message - always 16 byte block */
-        memcpy_toio(mptr, SCpnt->cmnd, 16);
+        memcpy(mptr, SCpnt->cmnd, 16);
         mptr += 4;
 
         if (sgl_offset != SGL_OFFSET_0) {
                 /* write size of data addressed by SGL */
-                writel(SCpnt->request_bufflen, mptr++);
+                *mptr++ = cpu_to_le32(SCpnt->request_bufflen);
 
                 /* Now fill in the SGList and command */
                 if (SCpnt->use_sg) {
@@ -676,11 +675,11 @@ static int i2o_scsi_queuecommand(struct scsi_cmnd *SCpnt,
         }
 
         /* Stick the headers on */
-        writel(I2O_MESSAGE_SIZE(mptr - &msg->u.head[0]) | sgl_offset,
-               &msg->u.head[0]);
+        msg->u.head[0] =
+            cpu_to_le32(I2O_MESSAGE_SIZE(mptr - &msg->u.head[0]) | sgl_offset);
 
         /* Queue the message */
-        i2o_msg_post(c, m);
+        i2o_msg_post(c, msg);
 
         osm_debug("Issued %ld\n", SCpnt->serial_number);
 
@@ -688,7 +687,7 @@ static int i2o_scsi_queuecommand(struct scsi_cmnd *SCpnt,
 
       nomem:
         rc = -ENOMEM;
-        i2o_msg_nop(c, m);
+        i2o_msg_nop(c, msg);
 
       exit:
         return rc;
@@ -709,8 +708,7 @@ static int i2o_scsi_abort(struct scsi_cmnd *SCpnt)
 {
         struct i2o_device *i2o_dev;
         struct i2o_controller *c;
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         int tid;
         int status = FAILED;
 
@@ -720,16 +718,16 @@ static int i2o_scsi_abort(struct scsi_cmnd *SCpnt)
         c = i2o_dev->iop;
         tid = i2o_dev->lct_data.tid;
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
                 return SCSI_MLQUEUE_HOST_BUSY;
 
-        writel(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_SCSI_ABORT << 24 | HOST_TID << 12 | tid,
-               &msg->u.head[1]);
-        writel(i2o_cntxt_list_get_ptr(c, SCpnt), &msg->body[0]);
+        msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_SCSI_ABORT << 24 | HOST_TID << 12 | tid);
+        msg->body[0] = cpu_to_le32(i2o_cntxt_list_get_ptr(c, SCpnt));
 
-        if (i2o_msg_post_wait(c, m, I2O_TIMEOUT_SCSI_SCB_ABORT))
+        if (i2o_msg_post_wait(c, msg, I2O_TIMEOUT_SCSI_SCB_ABORT))
                 status = SUCCESS;
 
         return status;
diff --git a/drivers/message/i2o/iop.c b/drivers/message/i2o/iop.c
index 4eb53258842e..f86abb42bf89 100644
--- a/drivers/message/i2o/iop.c
+++ b/drivers/message/i2o/iop.c
@@ -47,27 +47,6 @@ static struct i2o_dma i2o_systab;
 static int i2o_hrt_get(struct i2o_controller *c);
 
 /**
- *      i2o_msg_nop - Returns a message which is not used
- *      @c: I2O controller from which the message was created
- *      @m: message which should be returned
- *
- *      If you fetch a message via i2o_msg_get, and can't use it, you must
- *      return the message with this function. Otherwise the message frame
- *      is lost.
- */
-void i2o_msg_nop(struct i2o_controller *c, u32 m)
-{
-        struct i2o_message __iomem *msg = i2o_msg_in_to_virt(c, m);
-
-        writel(THREE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_UTIL_NOP << 24 | HOST_TID << 12 | ADAPTER_TID,
-               &msg->u.head[1]);
-        writel(0, &msg->u.head[2]);
-        writel(0, &msg->u.head[3]);
-        i2o_msg_post(c, m);
-};
-
-/**
  *      i2o_msg_get_wait - obtain an I2O message from the IOP
  *      @c: I2O controller
  *      @msg: pointer to a I2O message pointer
@@ -81,22 +60,21 @@ void i2o_msg_nop(struct i2o_controller *c, u32 m)
  *      address from the read port (see the i2o spec). If no message is
  *      available returns I2O_QUEUE_EMPTY and msg is leaved untouched.
  */
-u32 i2o_msg_get_wait(struct i2o_controller *c,
-                     struct i2o_message __iomem ** msg, int wait)
+struct i2o_message *i2o_msg_get_wait(struct i2o_controller *c, int wait)
 {
         unsigned long timeout = jiffies + wait * HZ;
-        u32 m;
+        struct i2o_message *msg;
 
-        while ((m = i2o_msg_get(c, msg)) == I2O_QUEUE_EMPTY) {
+        while (IS_ERR(msg = i2o_msg_get(c))) {
                 if (time_after(jiffies, timeout)) {
                         osm_debug("%s: Timeout waiting for message frame.\n",
                                   c->name);
-                        return I2O_QUEUE_EMPTY;
+                        return ERR_PTR(-ETIMEDOUT);
                 }
                 schedule_timeout_uninterruptible(1);
         }
 
-        return m;
+        return msg;
 };
 
 #if BITS_PER_LONG == 64
@@ -301,8 +279,7 @@ struct i2o_device *i2o_iop_find_device(struct i2o_controller *c, u16 tid)
  */
 static int i2o_iop_quiesce(struct i2o_controller *c)
 {
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         i2o_status_block *sb = c->status_block.virt;
         int rc;
 
@@ -313,16 +290,17 @@ static int i2o_iop_quiesce(struct i2o_controller *c)
             (sb->iop_state != ADAPTER_STATE_OPERATIONAL))
                 return 0;
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
-        writel(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_SYS_QUIESCE << 24 | HOST_TID << 12 | ADAPTER_TID,
-               &msg->u.head[1]);
+        msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_SYS_QUIESCE << 24 | HOST_TID << 12 |
+                        ADAPTER_TID);
 
         /* Long timeout needed for quiesce if lots of devices */
-        if ((rc = i2o_msg_post_wait(c, m, 240)))
+        if ((rc = i2o_msg_post_wait(c, msg, 240)))
                 osm_info("%s: Unable to quiesce (status=%#x).\n", c->name, -rc);
         else
                 osm_debug("%s: Quiesced.\n", c->name);
@@ -342,8 +320,7 @@ static int i2o_iop_quiesce(struct i2o_controller *c)
  */
 static int i2o_iop_enable(struct i2o_controller *c)
 {
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         i2o_status_block *sb = c->status_block.virt;
         int rc;
 
@@ -353,16 +330,17 @@ static int i2o_iop_enable(struct i2o_controller *c)
         if (sb->iop_state != ADAPTER_STATE_READY)
                 return -EINVAL;
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
-        writel(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_SYS_ENABLE << 24 | HOST_TID << 12 | ADAPTER_TID,
-               &msg->u.head[1]);
+        msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_SYS_ENABLE << 24 | HOST_TID << 12 |
+                        ADAPTER_TID);
 
         /* How long of a timeout do we need? */
-        if ((rc = i2o_msg_post_wait(c, m, 240)))
+        if ((rc = i2o_msg_post_wait(c, msg, 240)))
                 osm_err("%s: Could not enable (status=%#x).\n", c->name, -rc);
         else
                 osm_debug("%s: Enabled.\n", c->name);
@@ -413,22 +391,22 @@ static inline void i2o_iop_enable_all(void)
  */
 static int i2o_iop_clear(struct i2o_controller *c)
 {
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         int rc;
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
         /* Quiesce all IOPs first */
         i2o_iop_quiesce_all();
 
-        writel(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_ADAPTER_CLEAR << 24 | HOST_TID << 12 | ADAPTER_TID,
-               &msg->u.head[1]);
+        msg->u.head[0] = cpu_to_le32(FOUR_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_ADAPTER_CLEAR << 24 | HOST_TID << 12 |
+                        ADAPTER_TID);
 
-        if ((rc = i2o_msg_post_wait(c, m, 30)))
+        if ((rc = i2o_msg_post_wait(c, msg, 30)))
                 osm_info("%s: Unable to clear (status=%#x).\n", c->name, -rc);
         else
                 osm_debug("%s: Cleared.\n", c->name);
@@ -446,13 +424,13 @@ static int i2o_iop_clear(struct i2o_controller *c)
  *      Clear and (re)initialize IOP's outbound queue and post the message
  *      frames to the IOP.
  *
- *      Returns 0 on success or a negative errno code on failure.
+ *      Returns 0 on success or negative error code on failure.
  */
 static int i2o_iop_init_outbound_queue(struct i2o_controller *c)
 {
-        volatile u8 *status = c->status.virt;
         u32 m;
-        struct i2o_message __iomem *msg;
+        volatile u8 *status = c->status.virt;
+        struct i2o_message *msg;
         ulong timeout;
         int i;
 
@@ -460,23 +438,24 @@ static int i2o_iop_init_outbound_queue(struct i2o_controller *c)
 
         memset(c->status.virt, 0, 4);
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
-
-        writel(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6, &msg->u.head[0]);
-        writel(I2O_CMD_OUTBOUND_INIT << 24 | HOST_TID << 12 | ADAPTER_TID,
-               &msg->u.head[1]);
-        writel(i2o_exec_driver.context, &msg->u.s.icntxt);
-        writel(0x00000000, &msg->u.s.tcntxt);
-        writel(PAGE_SIZE, &msg->body[0]);
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
+
+        msg->u.head[0] = cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_6);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_OUTBOUND_INIT << 24 | HOST_TID << 12 |
+                        ADAPTER_TID);
+        msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context);
+        msg->u.s.tcntxt = cpu_to_le32(0x00000000);
+        msg->body[0] = cpu_to_le32(PAGE_SIZE);
         /* Outbound msg frame size in words and Initcode */
-        writel(I2O_OUTBOUND_MSG_FRAME_SIZE << 16 | 0x80, &msg->body[1]);
-        writel(0xd0000004, &msg->body[2]);
-        writel(i2o_dma_low(c->status.phys), &msg->body[3]);
-        writel(i2o_dma_high(c->status.phys), &msg->body[4]);
+        msg->body[1] = cpu_to_le32(I2O_OUTBOUND_MSG_FRAME_SIZE << 16 | 0x80);
+        msg->body[2] = cpu_to_le32(0xd0000004);
+        msg->body[3] = cpu_to_le32(i2o_dma_low(c->status.phys));
+        msg->body[4] = cpu_to_le32(i2o_dma_high(c->status.phys));
 
-        i2o_msg_post(c, m);
+        i2o_msg_post(c, msg);
 
         timeout = jiffies + I2O_TIMEOUT_INIT_OUTBOUND_QUEUE * HZ;
         while (*status <= I2O_CMD_IN_PROGRESS) {
@@ -511,34 +490,34 @@ static int i2o_iop_init_outbound_queue(struct i2o_controller *c)
 static int i2o_iop_reset(struct i2o_controller *c)
 {
         volatile u8 *status = c->status.virt;
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         unsigned long timeout;
         i2o_status_block *sb = c->status_block.virt;
         int rc = 0;
 
         osm_debug("%s: Resetting controller\n", c->name);
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
         memset(c->status_block.virt, 0, 8);
 
         /* Quiesce all IOPs first */
         i2o_iop_quiesce_all();
 
-        writel(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_ADAPTER_RESET << 24 | HOST_TID << 12 | ADAPTER_TID,
-               &msg->u.head[1]);
-        writel(i2o_exec_driver.context, &msg->u.s.icntxt);
-        writel(0, &msg->u.s.tcntxt);    //FIXME: use reasonable transaction context
-        writel(0, &msg->body[0]);
-        writel(0, &msg->body[1]);
-        writel(i2o_dma_low(c->status.phys), &msg->body[2]);
-        writel(i2o_dma_high(c->status.phys), &msg->body[3]);
+        msg->u.head[0] = cpu_to_le32(EIGHT_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_ADAPTER_RESET << 24 | HOST_TID << 12 |
+                        ADAPTER_TID);
+        msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context);
+        msg->u.s.tcntxt = cpu_to_le32(0x00000000);
+        msg->body[0] = cpu_to_le32(0x00000000);
+        msg->body[1] = cpu_to_le32(0x00000000);
+        msg->body[2] = cpu_to_le32(i2o_dma_low(c->status.phys));
+        msg->body[3] = cpu_to_le32(i2o_dma_high(c->status.phys));
 
-        i2o_msg_post(c, m);
+        i2o_msg_post(c, msg);
 
         /* Wait for a reply */
         timeout = jiffies + I2O_TIMEOUT_RESET * HZ;
@@ -567,18 +546,15 @@ static int i2o_iop_reset(struct i2o_controller *c)
                 osm_debug("%s: Reset in progress, waiting for reboot...\n",
                           c->name);
 
-                m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_RESET);
-                while (m == I2O_QUEUE_EMPTY) {
+                while (IS_ERR(msg = i2o_msg_get_wait(c, I2O_TIMEOUT_RESET))) {
                         if (time_after(jiffies, timeout)) {
                                 osm_err("%s: IOP reset timeout.\n", c->name);
-                                rc = -ETIMEDOUT;
+                                rc = PTR_ERR(msg);
                                 goto exit;
                         }
                         schedule_timeout_uninterruptible(1);
-
-                        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_RESET);
                 }
-                i2o_msg_nop(c, m);
+                i2o_msg_nop(c, msg);
 
                 /* from here all quiesce commands are safe */
                 c->no_quiesce = 0;
@@ -686,8 +662,7 @@ static int i2o_iop_activate(struct i2o_controller *c)
  */
 static int i2o_iop_systab_set(struct i2o_controller *c)
 {
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         i2o_status_block *sb = c->status_block.virt;
         struct device *dev = &c->pdev->dev;
         struct resource *root;
@@ -735,20 +710,21 @@ static int i2o_iop_systab_set(struct i2o_controller *c)
                 }
         }
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
         i2o_systab.phys = dma_map_single(dev, i2o_systab.virt, i2o_systab.len,
                                          PCI_DMA_TODEVICE);
         if (!i2o_systab.phys) {
-                i2o_msg_nop(c, m);
+                i2o_msg_nop(c, msg);
                 return -ENOMEM;
         }
 
-        writel(I2O_MESSAGE_SIZE(12) | SGL_OFFSET_6, &msg->u.head[0]);
-        writel(I2O_CMD_SYS_TAB_SET << 24 | HOST_TID << 12 | ADAPTER_TID,
-               &msg->u.head[1]);
+        msg->u.head[0] = cpu_to_le32(I2O_MESSAGE_SIZE(12) | SGL_OFFSET_6);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_SYS_TAB_SET << 24 | HOST_TID << 12 |
+                        ADAPTER_TID);
 
         /*
          * Provide three SGL-elements:
@@ -760,16 +736,16 @@ static int i2o_iop_systab_set(struct i2o_controller *c)
          * same table to everyone. We have to go remap it for them all
          */
 
-        writel(c->unit + 2, &msg->body[0]);
-        writel(0, &msg->body[1]);
-        writel(0x54000000 | i2o_systab.len, &msg->body[2]);
-        writel(i2o_systab.phys, &msg->body[3]);
-        writel(0x54000000 | sb->current_mem_size, &msg->body[4]);
-        writel(sb->current_mem_base, &msg->body[5]);
-        writel(0xd4000000 | sb->current_io_size, &msg->body[6]);
-        writel(sb->current_io_base, &msg->body[6]);
+        msg->body[0] = cpu_to_le32(c->unit + 2);
+        msg->body[1] = cpu_to_le32(0x00000000);
+        msg->body[2] = cpu_to_le32(0x54000000 | i2o_systab.len);
+        msg->body[3] = cpu_to_le32(i2o_systab.phys);
+        msg->body[4] = cpu_to_le32(0x54000000 | sb->current_mem_size);
+        msg->body[5] = cpu_to_le32(sb->current_mem_base);
+        msg->body[6] = cpu_to_le32(0xd4000000 | sb->current_io_size);
+        msg->body[6] = cpu_to_le32(sb->current_io_base);
 
-        rc = i2o_msg_post_wait(c, m, 120);
+        rc = i2o_msg_post_wait(c, msg, 120);
 
         dma_unmap_single(dev, i2o_systab.phys, i2o_systab.len,
                          PCI_DMA_TODEVICE);
@@ -952,30 +928,30 @@ static int i2o_parse_hrt(struct i2o_controller *c)
  */
 int i2o_status_get(struct i2o_controller *c)
 {
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
         volatile u8 *status_block;
         unsigned long timeout;
 
         status_block = (u8 *) c->status_block.virt;
         memset(c->status_block.virt, 0, sizeof(i2o_status_block));
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
-        writel(NINE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_STATUS_GET << 24 | HOST_TID << 12 | ADAPTER_TID,
-               &msg->u.head[1]);
-        writel(i2o_exec_driver.context, &msg->u.s.icntxt);
-        writel(0, &msg->u.s.tcntxt);    // FIXME: use resonable transaction context
-        writel(0, &msg->body[0]);
-        writel(0, &msg->body[1]);
-        writel(i2o_dma_low(c->status_block.phys), &msg->body[2]);
-        writel(i2o_dma_high(c->status_block.phys), &msg->body[3]);
-        writel(sizeof(i2o_status_block), &msg->body[4]);        /* always 88 bytes */
+        msg->u.head[0] = cpu_to_le32(NINE_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_STATUS_GET << 24 | HOST_TID << 12 |
+                        ADAPTER_TID);
+        msg->u.s.icntxt = cpu_to_le32(i2o_exec_driver.context);
+        msg->u.s.tcntxt = cpu_to_le32(0x00000000);
+        msg->body[0] = cpu_to_le32(0x00000000);
+        msg->body[1] = cpu_to_le32(0x00000000);
+        msg->body[2] = cpu_to_le32(i2o_dma_low(c->status_block.phys));
+        msg->body[3] = cpu_to_le32(i2o_dma_high(c->status_block.phys));
+        msg->body[4] = cpu_to_le32(sizeof(i2o_status_block));   /* always 88 bytes */
 
-        i2o_msg_post(c, m);
+        i2o_msg_post(c, msg);
 
         /* Wait for a reply */
         timeout = jiffies + I2O_TIMEOUT_STATUS_GET * HZ;
@@ -1013,20 +989,20 @@ static int i2o_hrt_get(struct i2o_controller *c)
         struct device *dev = &c->pdev->dev;
 
         for (i = 0; i < I2O_HRT_GET_TRIES; i++) {
-                struct i2o_message __iomem *msg;
-                u32 m;
+                struct i2o_message *msg;
 
-                m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-                if (m == I2O_QUEUE_EMPTY)
-                        return -ETIMEDOUT;
+                msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+                if (IS_ERR(msg))
+                        return PTR_ERR(msg);
 
-                writel(SIX_WORD_MSG_SIZE | SGL_OFFSET_4, &msg->u.head[0]);
-                writel(I2O_CMD_HRT_GET << 24 | HOST_TID << 12 | ADAPTER_TID,
-                       &msg->u.head[1]);
-                writel(0xd0000000 | c->hrt.len, &msg->body[0]);
-                writel(c->hrt.phys, &msg->body[1]);
+                msg->u.head[0] = cpu_to_le32(SIX_WORD_MSG_SIZE | SGL_OFFSET_4);
+                msg->u.head[1] =
+                    cpu_to_le32(I2O_CMD_HRT_GET << 24 | HOST_TID << 12 |
+                                ADAPTER_TID);
+                msg->body[0] = cpu_to_le32(0xd0000000 | c->hrt.len);
+                msg->body[1] = cpu_to_le32(c->hrt.phys);
 
-                rc = i2o_msg_post_wait_mem(c, m, 20, &c->hrt);
+                rc = i2o_msg_post_wait_mem(c, msg, 20, &c->hrt);
 
                 if (rc < 0) {
                         osm_err("%s: Unable to get HRT (status=%#x)\n", c->name,
@@ -1056,6 +1032,7 @@ static int i2o_hrt_get(struct i2o_controller *c)
  */
 void i2o_iop_free(struct i2o_controller *c)
 {
+        i2o_pool_free(&c->in_msg);
         kfree(c);
 };
 
@@ -1080,7 +1057,7 @@ static struct class *i2o_controller_class;
  *      i2o_iop_alloc - Allocate and initialize a i2o_controller struct
  *
  *      Allocate the necessary memory for a i2o_controller struct and
- *      initialize the lists.
+ *      initialize the lists and message mempool.
  *
  *      Returns a pointer to the I2O controller or a negative error code on
  *      failure.
@@ -1089,6 +1066,7 @@ struct i2o_controller *i2o_iop_alloc(void)
 {
         static int unit = 0;    /* 0 and 1 are NULL IOP and Local Host */
         struct i2o_controller *c;
+        char poolname[32];
 
         c = kmalloc(sizeof(*c), GFP_KERNEL);
         if (!c) {
@@ -1098,11 +1076,20 @@ struct i2o_controller *i2o_iop_alloc(void)
         }
         memset(c, 0, sizeof(*c));
 
+        c->unit = unit++;
+        sprintf(c->name, "iop%d", c->unit);
+
+        snprintf(poolname, sizeof(poolname), "i2o_%s_msg_inpool", c->name);
+        if (i2o_pool_alloc
+            (&c->in_msg, poolname, I2O_INBOUND_MSG_FRAME_SIZE * 4,
+             I2O_MSG_INPOOL_MIN)) {
+                kfree(c);
+                return ERR_PTR(-ENOMEM);
+        };
+
         INIT_LIST_HEAD(&c->devices);
         spin_lock_init(&c->lock);
         init_MUTEX(&c->lct_lock);
-        c->unit = unit++;
-        sprintf(c->name, "iop%d", c->unit);
 
         device_initialize(&c->device);
 
@@ -1199,28 +1186,27 @@ int i2o_iop_add(struct i2o_controller *c)
  *      is waited for, or expected. If you do not want further notifications,
  *      call the i2o_event_register again with a evt_mask of 0.
  *
- *      Returns 0 on success or -ETIMEDOUT if no message could be fetched for
- *      sending the request.
+ *      Returns 0 on success or negative error code on failure.
  */
 int i2o_event_register(struct i2o_device *dev, struct i2o_driver *drv,
                        int tcntxt, u32 evt_mask)
 {
         struct i2o_controller *c = dev->iop;
-        struct i2o_message __iomem *msg;
-        u32 m;
+        struct i2o_message *msg;
 
-        m = i2o_msg_get_wait(c, &msg, I2O_TIMEOUT_MESSAGE_GET);
-        if (m == I2O_QUEUE_EMPTY)
-                return -ETIMEDOUT;
+        msg = i2o_msg_get_wait(c, I2O_TIMEOUT_MESSAGE_GET);
+        if (IS_ERR(msg))
+                return PTR_ERR(msg);
 
-        writel(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0, &msg->u.head[0]);
-        writel(I2O_CMD_UTIL_EVT_REGISTER << 24 | HOST_TID << 12 | dev->lct_data.
-               tid, &msg->u.head[1]);
-        writel(drv->context, &msg->u.s.icntxt);
-        writel(tcntxt, &msg->u.s.tcntxt);
-        writel(evt_mask, &msg->body[0]);
+        msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
+        msg->u.head[1] =
+            cpu_to_le32(I2O_CMD_UTIL_EVT_REGISTER << 24 | HOST_TID << 12 | dev->
+                        lct_data.tid);
+        msg->u.s.icntxt = cpu_to_le32(drv->context);
+        msg->u.s.tcntxt = cpu_to_le32(tcntxt);
+        msg->body[0] = cpu_to_le32(evt_mask);
 
-        i2o_msg_post(c, m);
+        i2o_msg_post(c, msg);
 
         return 0;
 };
diff --git a/drivers/message/i2o/pci.c b/drivers/message/i2o/pci.c
index ee7075fa1ec3..329d482eee81 100644
--- a/drivers/message/i2o/pci.c
+++ b/drivers/message/i2o/pci.c
@@ -483,4 +483,5 @@ void __exit i2o_pci_exit(void)
 {
         pci_unregister_driver(&i2o_pci_driver);
 };
+
 MODULE_DEVICE_TABLE(pci, i2o_pci_ids);