1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 8c83b11a77d5..5ca80aee2ed0 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -165,8 +165,9 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode)
         int ret;
 
         if (!dev)
-                return -ERESTARTSYS;
+                return -ERESTARTSYS; /* FIXME: busy loop! -arnd*/
 
+        lock_kernel();
         mutex_lock(&dev->lock);
 
         if (!dev->mtd) {
@@ -183,6 +184,7 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode)
 unlock:
         mutex_unlock(&dev->lock);
         blktrans_dev_put(dev);
+        unlock_kernel();
         return ret;
 }
 
@@ -194,6 +196,7 @@ static int blktrans_release(struct gendisk *disk, fmode_t mode)
         if (!dev)
                 return ret;
 
+        lock_kernel();
         mutex_lock(&dev->lock);
 
         /* Release one reference, we sure its not the last one here*/
@@ -206,6 +209,7 @@ static int blktrans_release(struct gendisk *disk, fmode_t mode)
 unlock:
         mutex_unlock(&dev->lock);
         blktrans_dev_put(dev);
+        unlock_kernel();
         return ret;
 }