1 files changed, 16 insertions, 16 deletions

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 537cb722a21..5d9c559f187 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -82,6 +82,7 @@ static const struct block_device_operations xlvbd_block_fops;
  */
 struct blkfront_info
 {
+        spinlock_t io_lock;
         struct mutex mutex;
         struct xenbus_device *xbdev;
         struct gendisk *gd;
@@ -106,8 +107,6 @@ struct blkfront_info
         int is_ready;
 };
 
-static DEFINE_SPINLOCK(blkif_io_lock);
-
 static unsigned int nr_minors;
 static unsigned long *minors;
 static DEFINE_SPINLOCK(minor_lock);
@@ -418,7 +417,7 @@ static int xlvbd_init_blk_queue(struct gendisk *gd, u16 sector_size)
         struct request_queue *rq;
         struct blkfront_info *info = gd->private_data;
 
-        rq = blk_init_queue(do_blkif_request, &blkif_io_lock);
+        rq = blk_init_queue(do_blkif_request, &info->io_lock);
         if (rq == NULL)
                 return -1;
 
@@ -635,14 +634,14 @@ static void xlvbd_release_gendisk(struct blkfront_info *info)
         if (info->rq == NULL)
                 return;
 
-        spin_lock_irqsave(&blkif_io_lock, flags);
+        spin_lock_irqsave(&info->io_lock, flags);
 
         /* No more blkif_request(). */
         blk_stop_queue(info->rq);
 
         /* No more gnttab callback work. */
         gnttab_cancel_free_callback(&info->callback);
-        spin_unlock_irqrestore(&blkif_io_lock, flags);
+        spin_unlock_irqrestore(&info->io_lock, flags);
 
         /* Flush gnttab callback work. Must be done with no locks held. */
         flush_work_sync(&info->work);
@@ -674,16 +673,16 @@ static void blkif_restart_queue(struct work_struct *work)
 {
         struct blkfront_info *info = container_of(work, struct blkfront_info, work);
 
-        spin_lock_irq(&blkif_io_lock);
+        spin_lock_irq(&info->io_lock);
         if (info->connected == BLKIF_STATE_CONNECTED)
                 kick_pending_request_queues(info);
-        spin_unlock_irq(&blkif_io_lock);
+        spin_unlock_irq(&info->io_lock);
 }
 
 static void blkif_free(struct blkfront_info *info, int suspend)
 {
         /* Prevent new requests being issued until we fix things up. */
-        spin_lock_irq(&blkif_io_lock);
+        spin_lock_irq(&info->io_lock);
         info->connected = suspend ?
                 BLKIF_STATE_SUSPENDED : BLKIF_STATE_DISCONNECTED;
         /* No more blkif_request(). */
@@ -691,7 +690,7 @@ static void blkif_free(struct blkfront_info *info, int suspend)
                 blk_stop_queue(info->rq);
         /* No more gnttab callback work. */
         gnttab_cancel_free_callback(&info->callback);
-        spin_unlock_irq(&blkif_io_lock);
+        spin_unlock_irq(&info->io_lock);
 
         /* Flush gnttab callback work. Must be done with no locks held. */
         flush_work_sync(&info->work);
@@ -727,10 +726,10 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
         struct blkfront_info *info = (struct blkfront_info *)dev_id;
         int error;
 
-        spin_lock_irqsave(&blkif_io_lock, flags);
+        spin_lock_irqsave(&info->io_lock, flags);
 
         if (unlikely(info->connected != BLKIF_STATE_CONNECTED)) {
-                spin_unlock_irqrestore(&blkif_io_lock, flags);
+                spin_unlock_irqrestore(&info->io_lock, flags);
                 return IRQ_HANDLED;
         }
 
@@ -815,7 +814,7 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
 
         kick_pending_request_queues(info);
 
-        spin_unlock_irqrestore(&blkif_io_lock, flags);
+        spin_unlock_irqrestore(&info->io_lock, flags);
 
         return IRQ_HANDLED;
 }
@@ -990,6 +989,7 @@ static int blkfront_probe(struct xenbus_device *dev,
         }
 
         mutex_init(&info->mutex);
+        spin_lock_init(&info->io_lock);
         info->xbdev = dev;
         info->vdevice = vdevice;
         info->connected = BLKIF_STATE_DISCONNECTED;
@@ -1067,7 +1067,7 @@ static int blkif_recover(struct blkfront_info *info)
 
         xenbus_switch_state(info->xbdev, XenbusStateConnected);
 
-        spin_lock_irq(&blkif_io_lock);
+        spin_lock_irq(&info->io_lock);
 
         /* Now safe for us to use the shared ring */
         info->connected = BLKIF_STATE_CONNECTED;
@@ -1078,7 +1078,7 @@ static int blkif_recover(struct blkfront_info *info)
         /* Kick any other new requests queued since we resumed */
         kick_pending_request_queues(info);
 
-        spin_unlock_irq(&blkif_io_lock);
+        spin_unlock_irq(&info->io_lock);
 
         return 0;
 }
@@ -1276,10 +1276,10 @@ static void blkfront_connect(struct blkfront_info *info)
         xenbus_switch_state(info->xbdev, XenbusStateConnected);
 
         /* Kick pending requests. */
-        spin_lock_irq(&blkif_io_lock);
+        spin_lock_irq(&info->io_lock);
         info->connected = BLKIF_STATE_CONNECTED;
         kick_pending_request_queues(info);
-        spin_unlock_irq(&blkif_io_lock);
+        spin_unlock_irq(&info->io_lock);
 
         add_disk(info->gd);