1 files changed, 54 insertions, 83 deletions

diff --git a/drivers/ieee1394/sbp2.c b/drivers/ieee1394/sbp2.c
index eca92eb475a1..2c765ca5aa50 100644
--- a/drivers/ieee1394/sbp2.c
+++ b/drivers/ieee1394/sbp2.c
@@ -214,6 +214,7 @@ static u32 global_outstanding_dmas = 0;
 #endif
 
 #define SBP2_ERR(fmt, args...)          HPSB_ERR("sbp2: "fmt, ## args)
+#define SBP2_DEBUG_ENTER()              SBP2_DEBUG("%s", __FUNCTION__)
 
 /*
  * Globals
@@ -535,7 +536,7 @@ static struct sbp2_command_info *sbp2util_allocate_command_orb(
                 command->Current_SCpnt = Current_SCpnt;
                 list_add_tail(&command->list, &scsi_id->sbp2_command_orb_inuse);
         } else {
-                SBP2_ERR("sbp2util_allocate_command_orb - No orbs available!");
+                SBP2_ERR("%s: no orbs available", __FUNCTION__);
         }
         spin_unlock_irqrestore(&scsi_id->sbp2_command_orb_lock, flags);
         return command;
@@ -549,7 +550,7 @@ static void sbp2util_free_command_dma(struct sbp2_command_info *command)
         struct hpsb_host *host;
 
         if (!scsi_id) {
-                printk(KERN_ERR "%s: scsi_id == NULL\n", __FUNCTION__);
+                SBP2_ERR("%s: scsi_id == NULL", __FUNCTION__);
                 return;
         }
 
@@ -610,7 +611,7 @@ static int sbp2_probe(struct device *dev)
         struct unit_directory *ud;
         struct scsi_id_instance_data *scsi_id;
 
-        SBP2_DEBUG("sbp2_probe");
+        SBP2_DEBUG_ENTER();
 
         ud = container_of(dev, struct unit_directory, device);
 
@@ -635,7 +636,7 @@ static int sbp2_remove(struct device *dev)
         struct scsi_id_instance_data *scsi_id;
         struct scsi_device *sdev;
 
-        SBP2_DEBUG("sbp2_remove");
+        SBP2_DEBUG_ENTER();
 
         ud = container_of(dev, struct unit_directory, device);
         scsi_id = ud->device.driver_data;
@@ -667,7 +668,7 @@ static int sbp2_update(struct unit_directory *ud)
 {
         struct scsi_id_instance_data *scsi_id = ud->device.driver_data;
 
-        SBP2_DEBUG("sbp2_update");
+        SBP2_DEBUG_ENTER();
 
         if (sbp2_reconnect_device(scsi_id)) {
 
@@ -715,7 +716,7 @@ static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud
         struct Scsi_Host *scsi_host = NULL;
         struct scsi_id_instance_data *scsi_id = NULL;
 
-        SBP2_DEBUG("sbp2_alloc_device");
+        SBP2_DEBUG_ENTER();
 
         scsi_id = kzalloc(sizeof(*scsi_id), GFP_KERNEL);
         if (!scsi_id) {
@@ -749,12 +750,22 @@ static struct scsi_id_instance_data *sbp2_alloc_device(struct unit_directory *ud
 
 #ifdef CONFIG_IEEE1394_SBP2_PHYS_DMA
                 /* Handle data movement if physical dma is not
-                 * enabled/supportedon host controller */
-                hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host, &sbp2_physdma_ops,
-                                        0x0ULL, 0xfffffffcULL);
+                 * enabled or not supported on host controller */
+                if (!hpsb_register_addrspace(&sbp2_highlevel, ud->ne->host,
+                                             &sbp2_physdma_ops,
+                                             0x0ULL, 0xfffffffcULL)) {
+                        SBP2_ERR("failed to register lower 4GB address range");
+                        goto failed_alloc;
+                }
 #endif
         }
 
+        /* Prevent unloading of the 1394 host */
+        if (!try_module_get(hi->host->driver->owner)) {
+                SBP2_ERR("failed to get a reference on 1394 host driver");
+                goto failed_alloc;
+        }
+
         scsi_id->hi = hi;
 
         list_add_tail(&scsi_id->scsi_list, &hi->scsi_ids);
@@ -816,7 +827,7 @@ static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
         struct sbp2scsi_host_info *hi = scsi_id->hi;
         int error;
 
-        SBP2_DEBUG("sbp2_start_device");
+        SBP2_DEBUG_ENTER();
 
         /* Login FIFO DMA */
         scsi_id->login_response =
@@ -891,7 +902,6 @@ static int sbp2_start_device(struct scsi_id_instance_data *scsi_id)
          * allows someone else to login instead. One second makes sense. */
         msleep_interruptible(1000);
         if (signal_pending(current)) {
-                SBP2_WARN("aborting sbp2_start_device due to event");
                 sbp2_remove_device(scsi_id);
                 return -EINTR;
         }
@@ -944,7 +954,7 @@ static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
 {
         struct sbp2scsi_host_info *hi;
 
-        SBP2_DEBUG("sbp2_remove_device");
+        SBP2_DEBUG_ENTER();
 
         if (!scsi_id)
                 return;
@@ -1015,6 +1025,9 @@ static void sbp2_remove_device(struct scsi_id_instance_data *scsi_id)
 
         scsi_id->ud->device.driver_data = NULL;
 
+        if (hi)
+                module_put(hi->host->driver->owner);
+
         SBP2_DEBUG("SBP-2 device removed, SCSI ID = %d", scsi_id->ud->id);
 
         kfree(scsi_id);
@@ -1073,23 +1086,20 @@ static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
         int max_logins;
         int active_logins;
 
-        SBP2_DEBUG("sbp2_query_logins");
+        SBP2_DEBUG_ENTER();
 
         scsi_id->query_logins_orb->reserved1 = 0x0;
         scsi_id->query_logins_orb->reserved2 = 0x0;
 
         scsi_id->query_logins_orb->query_response_lo = scsi_id->query_logins_response_dma;
         scsi_id->query_logins_orb->query_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
-        SBP2_DEBUG("sbp2_query_logins: query_response_hi/lo initialized");
 
         scsi_id->query_logins_orb->lun_misc = ORB_SET_FUNCTION(SBP2_QUERY_LOGINS_REQUEST);
         scsi_id->query_logins_orb->lun_misc |= ORB_SET_NOTIFY(1);
         scsi_id->query_logins_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun);
-        SBP2_DEBUG("sbp2_query_logins: lun_misc initialized");
 
         scsi_id->query_logins_orb->reserved_resp_length =
                 ORB_SET_QUERY_LOGINS_RESP_LENGTH(sizeof(struct sbp2_query_logins_response));
-        SBP2_DEBUG("sbp2_query_logins: reserved_resp_length initialized");
 
         scsi_id->query_logins_orb->status_fifo_hi =
                 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
@@ -1098,25 +1108,19 @@ static int sbp2_query_logins(struct scsi_id_instance_data *scsi_id)
 
         sbp2util_cpu_to_be32_buffer(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb));
 
-        SBP2_DEBUG("sbp2_query_logins: orb byte-swapped");
-
         sbp2util_packet_dump(scsi_id->query_logins_orb, sizeof(struct sbp2_query_logins_orb),
                              "sbp2 query logins orb", scsi_id->query_logins_orb_dma);
 
         memset(scsi_id->query_logins_response, 0, sizeof(struct sbp2_query_logins_response));
         memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
 
-        SBP2_DEBUG("sbp2_query_logins: query_logins_response/status FIFO memset");
-
         data[0] = ORB_SET_NODE_ID(hi->host->node_id);
         data[1] = scsi_id->query_logins_orb_dma;
         sbp2util_cpu_to_be32_buffer(data, 8);
 
         atomic_set(&scsi_id->sbp2_login_complete, 0);
 
-        SBP2_DEBUG("sbp2_query_logins: prepared to write");
         hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
-        SBP2_DEBUG("sbp2_query_logins: written");
 
         if (sbp2util_down_timeout(&scsi_id->sbp2_login_complete, 2*HZ)) {
                 SBP2_INFO("Error querying logins to SBP-2 device - timed out");
@@ -1165,10 +1169,10 @@ static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
         struct sbp2scsi_host_info *hi = scsi_id->hi;
         quadlet_t data[2];
 
-        SBP2_DEBUG("sbp2_login_device");
+        SBP2_DEBUG_ENTER();
 
         if (!scsi_id->login_orb) {
-                SBP2_DEBUG("sbp2_login_device: login_orb not alloc'd!");
+                SBP2_DEBUG("%s: login_orb not alloc'd!", __FUNCTION__);
                 return -EIO;
         }
 
@@ -1182,59 +1186,39 @@ static int sbp2_login_device(struct scsi_id_instance_data *scsi_id)
         /* Set-up login ORB, assume no password */
         scsi_id->login_orb->password_hi = 0;
         scsi_id->login_orb->password_lo = 0;
-        SBP2_DEBUG("sbp2_login_device: password_hi/lo initialized");
 
         scsi_id->login_orb->login_response_lo = scsi_id->login_response_dma;
         scsi_id->login_orb->login_response_hi = ORB_SET_NODE_ID(hi->host->node_id);
-        SBP2_DEBUG("sbp2_login_device: login_response_hi/lo initialized");
 
         scsi_id->login_orb->lun_misc = ORB_SET_FUNCTION(SBP2_LOGIN_REQUEST);
         scsi_id->login_orb->lun_misc |= ORB_SET_RECONNECT(0);   /* One second reconnect time */
         scsi_id->login_orb->lun_misc |= ORB_SET_EXCLUSIVE(exclusive_login);     /* Exclusive access to device */
         scsi_id->login_orb->lun_misc |= ORB_SET_NOTIFY(1);      /* Notify us of login complete */
         scsi_id->login_orb->lun_misc |= ORB_SET_LUN(scsi_id->sbp2_lun);
-        SBP2_DEBUG("sbp2_login_device: lun_misc initialized");
 
         scsi_id->login_orb->passwd_resp_lengths =
                 ORB_SET_LOGIN_RESP_LENGTH(sizeof(struct sbp2_login_response));
-        SBP2_DEBUG("sbp2_login_device: passwd_resp_lengths initialized");
 
         scsi_id->login_orb->status_fifo_hi =
                 ORB_SET_STATUS_FIFO_HI(scsi_id->status_fifo_addr, hi->host->node_id);
         scsi_id->login_orb->status_fifo_lo =
                 ORB_SET_STATUS_FIFO_LO(scsi_id->status_fifo_addr);
 
-        /*
-         * Byte swap ORB if necessary
-         */
         sbp2util_cpu_to_be32_buffer(scsi_id->login_orb, sizeof(struct sbp2_login_orb));
 
-        SBP2_DEBUG("sbp2_login_device: orb byte-swapped");
-
         sbp2util_packet_dump(scsi_id->login_orb, sizeof(struct sbp2_login_orb),
                              "sbp2 login orb", scsi_id->login_orb_dma);
 
-        /*
-         * Initialize login response and status fifo
-         */
         memset(scsi_id->login_response, 0, sizeof(struct sbp2_login_response));
         memset(&scsi_id->status_block, 0, sizeof(struct sbp2_status_block));
 
-        SBP2_DEBUG("sbp2_login_device: login_response/status FIFO memset");
-
-        /*
-         * Ok, let's write to the target's management agent register
-         */
         data[0] = ORB_SET_NODE_ID(hi->host->node_id);
         data[1] = scsi_id->login_orb_dma;
         sbp2util_cpu_to_be32_buffer(data, 8);
 
         atomic_set(&scsi_id->sbp2_login_complete, 0);
 
-        SBP2_DEBUG("sbp2_login_device: prepared to write to %08x",
-                   (unsigned int)scsi_id->sbp2_management_agent_addr);
         hpsb_node_write(scsi_id->ne, scsi_id->sbp2_management_agent_addr, data, 8);
-        SBP2_DEBUG("sbp2_login_device: written");
 
         /*
          * Wait for login status (up to 20 seconds)...
@@ -1298,7 +1282,7 @@ static int sbp2_logout_device(struct scsi_id_instance_data *scsi_id)
         quadlet_t data[2];
         int error;
 
-        SBP2_DEBUG("sbp2_logout_device");
+        SBP2_DEBUG_ENTER();
 
         /*
          * Set-up logout ORB
@@ -1362,7 +1346,7 @@ static int sbp2_reconnect_device(struct scsi_id_instance_data *scsi_id)
         quadlet_t data[2];
         int error;
 
-        SBP2_DEBUG("sbp2_reconnect_device");
+        SBP2_DEBUG_ENTER();
 
         /*
          * Set-up reconnect ORB
@@ -1453,17 +1437,11 @@ static int sbp2_set_busy_timeout(struct scsi_id_instance_data *scsi_id)
 {
         quadlet_t data;
 
-        SBP2_DEBUG("sbp2_set_busy_timeout");
+        SBP2_DEBUG_ENTER();
 
-        /*
-         * Ok, let's write to the target's busy timeout register
-         */
         data = cpu_to_be32(SBP2_BUSY_TIMEOUT_VALUE);
-
-        if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4)) {
-                SBP2_ERR("sbp2_set_busy_timeout error");
-        }
-
+        if (hpsb_node_write(scsi_id->ne, SBP2_BUSY_TIMEOUT_ADDRESS, &data, 4))
+                SBP2_ERR("%s error", __FUNCTION__);
         return 0;
 }
 
@@ -1482,7 +1460,7 @@ static void sbp2_parse_unit_directory(struct scsi_id_instance_data *scsi_id,
             firmware_revision, workarounds;
         int i;
 
-        SBP2_DEBUG("sbp2_parse_unit_directory");
+        SBP2_DEBUG_ENTER();
 
         management_agent_addr = 0x0;
         command_set_spec_id = 0x0;
@@ -1615,7 +1593,7 @@ static int sbp2_max_speed_and_size(struct scsi_id_instance_data *scsi_id)
 {
         struct sbp2scsi_host_info *hi = scsi_id->hi;
 
-        SBP2_DEBUG("sbp2_max_speed_and_size");
+        SBP2_DEBUG_ENTER();
 
         /* Initial setting comes from the hosts speed map */
         scsi_id->speed_code =
@@ -1652,11 +1630,8 @@ static int sbp2_agent_reset(struct scsi_id_instance_data *scsi_id, int wait)
         u64 addr;
         int retval;
 
-        SBP2_DEBUG("sbp2_agent_reset");
+        SBP2_DEBUG_ENTER();
 
-        /*
-         * Ok, let's write to the target's management agent register
-         */
         data = ntohl(SBP2_AGENT_RESET_DATA);
         addr = scsi_id->sbp2_command_block_agent_addr + SBP2_AGENT_RESET_OFFSET;
 
@@ -2004,11 +1979,7 @@ static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
         unsigned int request_bufflen = SCpnt->request_bufflen;
         struct sbp2_command_info *command;
 
-        SBP2_DEBUG("sbp2_send_command");
-#if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
-        printk("[scsi command]\n   ");
-        scsi_print_command(SCpnt);
-#endif
+        SBP2_DEBUG_ENTER();
         SBP2_DEBUG("SCSI transfer size = %x", request_bufflen);
         SBP2_DEBUG("SCSI s/g elements = %x", (unsigned int)SCpnt->use_sg);
 
@@ -2048,7 +2019,7 @@ static int sbp2_send_command(struct scsi_id_instance_data *scsi_id,
  */
 static unsigned int sbp2_status_to_sense_data(unchar *sbp2_status, unchar *sense_data)
 {
-        SBP2_DEBUG("sbp2_status_to_sense_data");
+        SBP2_DEBUG_ENTER();
 
         /*
          * Ok, it's pretty ugly...   ;-)
@@ -2082,7 +2053,7 @@ static void sbp2_check_sbp2_response(struct scsi_id_instance_data *scsi_id,
 {
         u8 *scsi_buf = SCpnt->request_buffer;
 
-        SBP2_DEBUG("sbp2_check_sbp2_response");
+        SBP2_DEBUG_ENTER();
 
         if (SCpnt->cmnd[0] == INQUIRY && (SCpnt->cmnd[1] & 3) == 0) {
                 /*
@@ -2113,7 +2084,7 @@ static int sbp2_handle_status_write(struct hpsb_host *host, int nodeid, int dest
         struct sbp2_command_info *command;
         unsigned long flags;
 
-        SBP2_DEBUG("sbp2_handle_status_write");
+        SBP2_DEBUG_ENTER();
 
         sbp2util_packet_dump(data, length, "sbp2 status write by device", (u32)addr);
 
@@ -2260,7 +2231,10 @@ static int sbp2scsi_queuecommand(struct scsi_cmnd *SCpnt,
         struct sbp2scsi_host_info *hi;
         int result = DID_NO_CONNECT << 16;
 
-        SBP2_DEBUG("sbp2scsi_queuecommand");
+        SBP2_DEBUG_ENTER();
+#if (CONFIG_IEEE1394_SBP2_DEBUG >= 2) || defined(CONFIG_IEEE1394_SBP2_PACKET_DUMP)
+        scsi_print_command(SCpnt);
+#endif
 
         if (!sbp2util_node_is_available(scsi_id))
                 goto done;
@@ -2338,7 +2312,7 @@ static void sbp2scsi_complete_all_commands(struct scsi_id_instance_data *scsi_id
         struct sbp2_command_info *command;
         unsigned long flags;
 
-        SBP2_DEBUG("sbp2scsi_complete_all_commands");
+        SBP2_DEBUG_ENTER();
 
         spin_lock_irqsave(&scsi_id->sbp2_command_orb_lock, flags);
         while (!list_empty(&scsi_id->sbp2_command_orb_inuse)) {
@@ -2371,7 +2345,7 @@ static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
                                       u32 scsi_status, struct scsi_cmnd *SCpnt,
                                       void (*done)(struct scsi_cmnd *))
 {
-        SBP2_DEBUG("sbp2scsi_complete_command");
+        SBP2_DEBUG_ENTER();
 
         /*
          * Sanity
@@ -2397,7 +2371,7 @@ static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
          */
         switch (scsi_status) {
         case SBP2_SCSI_STATUS_GOOD:
-                SCpnt->result = DID_OK;
+                SCpnt->result = DID_OK << 16;
                 break;
 
         case SBP2_SCSI_STATUS_BUSY:
@@ -2407,16 +2381,11 @@ static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
 
         case SBP2_SCSI_STATUS_CHECK_CONDITION:
                 SBP2_DEBUG("SBP2_SCSI_STATUS_CHECK_CONDITION");
-                SCpnt->result = CHECK_CONDITION << 1;
-
-                /*
-                 * Debug stuff
-                 */
+                SCpnt->result = CHECK_CONDITION << 1 | DID_OK << 16;
 #if CONFIG_IEEE1394_SBP2_DEBUG >= 1
                 scsi_print_command(SCpnt);
-                scsi_print_sense("bh", SCpnt);
+                scsi_print_sense(SBP2_DEVICE_NAME, SCpnt);
 #endif
-
                 break;
 
         case SBP2_SCSI_STATUS_SELECTION_TIMEOUT:
@@ -2441,7 +2410,7 @@ static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
         /*
          * Take care of any sbp2 response data mucking here (RBC stuff, etc.)
          */
-        if (SCpnt->result == DID_OK) {
+        if (SCpnt->result == DID_OK << 16) {
                 sbp2_check_sbp2_response(scsi_id, SCpnt);
         }
 
@@ -2459,6 +2428,8 @@ static void sbp2scsi_complete_command(struct scsi_id_instance_data *scsi_id,
          * If a unit attention occurs, return busy status so it gets
          * retried... it could have happened because of a 1394 bus reset
          * or hot-plug...
+         * XXX  DID_BUS_BUSY is actually a bad idea because it will defy
+         * the scsi layer's retry logic.
          */
 #if 0
         if ((scsi_status == SBP2_SCSI_STATUS_CHECK_CONDITION) &&
@@ -2624,7 +2595,7 @@ static int sbp2_module_init(void)
 {
         int ret;
 
-        SBP2_DEBUG("sbp2_module_init");
+        SBP2_DEBUG_ENTER();
 
         /* Module load debug option to force one command at a time (serializing I/O) */
         if (serialize_io) {
@@ -2652,7 +2623,7 @@ static int sbp2_module_init(void)
 
 static void __exit sbp2_module_exit(void)
 {
-        SBP2_DEBUG("sbp2_module_exit");
+        SBP2_DEBUG_ENTER();
 
         hpsb_unregister_protocol(&sbp2_driver);