[S390] cio: Use dev_{g,s}et_drvdata().

Also define helpers sch_{g,s}et_cdev() to make the intention more
clear.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

4 files changed, 40 insertions, 38 deletions

diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index b3e2c16caa41..b9997fb4883c 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -111,7 +111,7 @@ ccwgroup_release (struct device *dev)
         gdev = to_ccwgroupdev(dev);
 
         for (i = 0; i < gdev->count; i++) {
-                gdev->cdev[i]->dev.driver_data = NULL;
+                dev_set_drvdata(&gdev->cdev[i]->dev, NULL);
                 put_device(&gdev->cdev[i]->dev);
         }
         kfree(gdev);
@@ -196,11 +196,11 @@ int ccwgroup_create(struct device *root, unsigned int creator_id,
                         goto error;
                 }
                 /* Don't allow a device to belong to more than one group. */
-                if (gdev->cdev[i]->dev.driver_data) {
+                if (dev_get_drvdata(&gdev->cdev[i]->dev)) {
                         rc = -EINVAL;
                         goto error;
                 }
-                gdev->cdev[i]->dev.driver_data = gdev;
+                dev_set_drvdata(&gdev->cdev[i]->dev, gdev);
         }
 
         gdev->creator_id = creator_id;
@@ -234,8 +234,8 @@ int ccwgroup_create(struct device *root, unsigned int creator_id,
 error:
         for (i = 0; i < argc; i++)
                 if (gdev->cdev[i]) {
-                        if (gdev->cdev[i]->dev.driver_data == gdev)
-                                gdev->cdev[i]->dev.driver_data = NULL;
+                        if (dev_get_drvdata(&gdev->cdev[i]->dev) == gdev)
+                                dev_set_drvdata(&gdev->cdev[i]->dev, NULL);
                         put_device(&gdev->cdev[i]->dev);
                 }
         mutex_unlock(&gdev->reg_mutex);
@@ -463,8 +463,8 @@ __ccwgroup_get_gdev_by_cdev(struct ccw_device *cdev)
 {
         struct ccwgroup_device *gdev;
 
-        if (cdev->dev.driver_data) {
-                gdev = (struct ccwgroup_device *)cdev->dev.driver_data;
+        gdev = dev_get_drvdata(&cdev->dev);
+        if (gdev) {
                 if (get_device(&gdev->dev)) {
                         mutex_lock(&gdev->reg_mutex);
                         if (device_is_registered(&gdev->dev))
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 30fe59cc28c9..933f763e9586 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -773,7 +773,7 @@ static void sch_attach_device(struct subchannel *sch,
 {
         css_update_ssd_info(sch);
         spin_lock_irq(sch->lock);
-        sch->dev.driver_data = cdev;
+        sch_set_cdev(sch, cdev);
         cdev->private->schid = sch->schid;
         cdev->ccwlock = sch->lock;
         device_trigger_reprobe(sch);
@@ -795,7 +795,7 @@ static void sch_attach_disconnected_device(struct subchannel *sch,
                 put_device(&other_sch->dev);
                 return;
         }
-        other_sch->dev.driver_data = NULL;
+        sch_set_cdev(other_sch, NULL);
         /* No need to keep a subchannel without ccw device around. */
         css_sch_device_unregister(other_sch);
         put_device(&other_sch->dev);
@@ -831,12 +831,12 @@ static void sch_create_and_recog_new_device(struct subchannel *sch)
                 return;
         }
         spin_lock_irq(sch->lock);
-        sch->dev.driver_data = cdev;
+        sch_set_cdev(sch, cdev);
         spin_unlock_irq(sch->lock);
         /* Start recognition for the new ccw device. */
         if (io_subchannel_recog(cdev, sch)) {
                 spin_lock_irq(sch->lock);
-                sch->dev.driver_data = NULL;
+                sch_set_cdev(sch, NULL);
                 spin_unlock_irq(sch->lock);
                 if (cdev->dev.release)
                         cdev->dev.release(&cdev->dev);
@@ -940,7 +940,7 @@ io_subchannel_register(struct work_struct *work)
                               cdev->private->dev_id.devno, ret);
                 put_device(&cdev->dev);
                 spin_lock_irqsave(sch->lock, flags);
-                sch->dev.driver_data = NULL;
+                sch_set_cdev(sch, NULL);
                 spin_unlock_irqrestore(sch->lock, flags);
                 kfree (cdev->private);
                 kfree (cdev);
@@ -1022,7 +1022,7 @@ io_subchannel_recog(struct ccw_device *cdev, struct subchannel *sch)
         int rc;
         struct ccw_device_private *priv;
 
-        sch->dev.driver_data = cdev;
+        sch_set_cdev(sch, cdev);
         sch->driver = &io_subchannel_driver;
         cdev->ccwlock = sch->lock;
 
@@ -1082,7 +1082,7 @@ static void ccw_device_move_to_sch(struct work_struct *work)
         }
         if (former_parent) {
                 spin_lock_irq(former_parent->lock);
-                former_parent->dev.driver_data = NULL;
+                sch_set_cdev(former_parent, NULL);
                 spin_unlock_irq(former_parent->lock);
                 css_sch_device_unregister(former_parent);
                 /* Reset intparm to zeroes. */
@@ -1100,7 +1100,7 @@ static void io_subchannel_irq(struct subchannel *sch)
 {
         struct ccw_device *cdev;
 
-        cdev = sch->dev.driver_data;
+        cdev = sch_get_cdev(sch);
 
         CIO_TRACE_EVENT(3, "IRQ");
         CIO_TRACE_EVENT(3, sch->dev.bus_id);
@@ -1116,13 +1116,13 @@ io_subchannel_probe (struct subchannel *sch)
         unsigned long flags;
         struct ccw_dev_id dev_id;
 
-        if (sch->dev.driver_data) {
+        cdev = sch_get_cdev(sch);
+        if (cdev) {
                 /*
                  * This subchannel already has an associated ccw_device.
                  * Register it and exit. This happens for all early
                  * device, e.g. the console.
                  */
-                cdev = sch->dev.driver_data;
                 cdev->dev.groups = ccwdev_attr_groups;
                 device_initialize(&cdev->dev);
                 ccw_device_register(cdev);
@@ -1173,7 +1173,7 @@ io_subchannel_probe (struct subchannel *sch)
         rc = io_subchannel_recog(cdev, sch);
         if (rc) {
                 spin_lock_irqsave(sch->lock, flags);
-                sch->dev.driver_data = NULL;
+                sch_set_cdev(sch, NULL);
                 spin_unlock_irqrestore(sch->lock, flags);
                 if (cdev->dev.release)
                         cdev->dev.release(&cdev->dev);
@@ -1189,12 +1189,12 @@ io_subchannel_remove (struct subchannel *sch)
         struct ccw_device *cdev;
         unsigned long flags;
 
-        if (!sch->dev.driver_data)
+        cdev = sch_get_cdev(sch);
+        if (!cdev)
                 return 0;
-        cdev = sch->dev.driver_data;
         /* Set ccw device to not operational and drop reference. */
         spin_lock_irqsave(cdev->ccwlock, flags);
-        sch->dev.driver_data = NULL;
+        sch_set_cdev(sch, NULL);
         cdev->private->state = DEV_STATE_NOT_OPER;
         spin_unlock_irqrestore(cdev->ccwlock, flags);
         ccw_device_unregister(cdev);
@@ -1207,7 +1207,7 @@ static int io_subchannel_notify(struct subchannel *sch, int event)
 {
         struct ccw_device *cdev;
 
-        cdev = sch->dev.driver_data;
+        cdev = sch_get_cdev(sch);
         if (!cdev)
                 return 0;
         if (!cdev->drv)
@@ -1221,7 +1221,7 @@ static void io_subchannel_verify(struct subchannel *sch)
 {
         struct ccw_device *cdev;
 
-        cdev = sch->dev.driver_data;
+        cdev = sch_get_cdev(sch);
         if (cdev)
                 dev_fsm_event(cdev, DEV_EVENT_VERIFY);
 }
@@ -1230,7 +1230,7 @@ static void io_subchannel_ioterm(struct subchannel *sch)
 {
         struct ccw_device *cdev;
 
-        cdev = sch->dev.driver_data;
+        cdev = sch_get_cdev(sch);
         if (!cdev)
                 return;
         /* Internal I/O will be retried by the interrupt handler. */
@@ -1248,7 +1248,7 @@ io_subchannel_shutdown(struct subchannel *sch)
         struct ccw_device *cdev;
         int ret;
 
-        cdev = sch->dev.driver_data;
+        cdev = sch_get_cdev(sch);
 
         if (cio_is_console(sch->schid))
                 return;
diff --git a/drivers/s390/cio/device_fsm.c b/drivers/s390/cio/device_fsm.c
index 4804d944fb4d..669e6a75f54f 100644
--- a/drivers/s390/cio/device_fsm.c
+++ b/drivers/s390/cio/device_fsm.c
@@ -32,9 +32,9 @@ device_is_online(struct subchannel *sch)
 {
         struct ccw_device *cdev;
 
-        if (!sch->dev.driver_data)
+        cdev = sch_get_cdev(sch);
+        if (!cdev)
                 return 0;
-        cdev = sch->dev.driver_data;
         return (cdev->private->state == DEV_STATE_ONLINE);
 }
 
@@ -43,9 +43,9 @@ device_is_disconnected(struct subchannel *sch)
 {
         struct ccw_device *cdev;
 
-        if (!sch->dev.driver_data)
+        cdev = sch_get_cdev(sch);
+        if (!cdev)
                 return 0;
-        cdev = sch->dev.driver_data;
         return (cdev->private->state == DEV_STATE_DISCONNECTED ||
                 cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID);
 }
@@ -55,9 +55,9 @@ device_set_disconnected(struct subchannel *sch)
 {
         struct ccw_device *cdev;
 
-        if (!sch->dev.driver_data)
+        cdev = sch_get_cdev(sch);
+        if (!cdev)
                 return;
-        cdev = sch->dev.driver_data;
         ccw_device_set_timeout(cdev, 0);
         cdev->private->flags.fake_irb = 0;
         cdev->private->state = DEV_STATE_DISCONNECTED;
@@ -67,7 +67,7 @@ void device_set_intretry(struct subchannel *sch)
 {
         struct ccw_device *cdev;
 
-        cdev = sch->dev.driver_data;
+        cdev = sch_get_cdev(sch);
         if (!cdev)
                 return;
         cdev->private->flags.intretry = 1;
@@ -77,7 +77,7 @@ int device_trigger_verify(struct subchannel *sch)
 {
         struct ccw_device *cdev;
 
-        cdev = sch->dev.driver_data;
+        cdev = sch_get_cdev(sch);
         if (!cdev || !cdev->online)
                 return -EINVAL;
         dev_fsm_event(cdev, DEV_EVENT_VERIFY);
@@ -175,9 +175,9 @@ device_kill_pending_timer(struct subchannel *sch)
 {
         struct ccw_device *cdev;
 
-        if (!sch->dev.driver_data)
+        cdev = sch_get_cdev(sch);
+        if (!cdev)
                 return;
-        cdev = sch->dev.driver_data;
         ccw_device_set_timeout(cdev, 0);
 }
 
@@ -992,7 +992,7 @@ void device_kill_io(struct subchannel *sch)
         int ret;
         struct ccw_device *cdev;
 
-        cdev = sch->dev.driver_data;
+        cdev = sch_get_cdev(sch);
         ret = ccw_device_cancel_halt_clear(cdev);
         if (ret == -EBUSY) {
                 ccw_device_set_timeout(cdev, 3*HZ);
@@ -1062,9 +1062,9 @@ device_trigger_reprobe(struct subchannel *sch)
 {
         struct ccw_device *cdev;
 
-        if (!sch->dev.driver_data)
+        cdev = sch_get_cdev(sch);
+        if (!cdev)
                 return;
-        cdev = sch->dev.driver_data;
         if (cdev->private->state != DEV_STATE_DISCONNECTED)
                 return;
 
diff --git a/drivers/s390/cio/io_sch.h b/drivers/s390/cio/io_sch.h
index d49e5a77a6bf..8c613160bfce 100644
--- a/drivers/s390/cio/io_sch.h
+++ b/drivers/s390/cio/io_sch.h
@@ -34,6 +34,8 @@ struct io_subchannel_private {
 } __attribute__ ((aligned(8)));
 
 #define to_io_private(n) ((struct io_subchannel_private *)n->private)
+#define sch_get_cdev(n) (dev_get_drvdata(&n->dev))
+#define sch_set_cdev(n, c) (dev_set_drvdata(&n->dev, c))
 
 #define MAX_CIWS 8