Merge tag 'v3.10.85' into update

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / mtd / mtd_blkdevs.c

diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index a9c1bf1fe1989d605e18e47cf155a61fa0b818da..2844f2f6f815b54f4986d34c1f911e1c09ec0f46 100644 (file)
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -199,6 +199,7 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode)
                return -ERESTARTSYS; /* FIXME: busy loop! -arnd*/
 
        mutex_lock(&dev->lock);
+       mutex_lock(&mtd_table_mutex);
 
        if (dev->open)
                goto unlock;
@@ -222,6 +223,7 @@ static int blktrans_open(struct block_device *bdev, fmode_t mode)
 
 unlock:
        dev->open++;
+       mutex_unlock(&mtd_table_mutex);
        mutex_unlock(&dev->lock);
        blktrans_dev_put(dev);
        return ret;
@@ -232,6 +234,7 @@ error_release:
 error_put:
        module_put(dev->tr->owner);
        kref_put(&dev->ref, blktrans_dev_release);
+       mutex_unlock(&mtd_table_mutex);
        mutex_unlock(&dev->lock);
        blktrans_dev_put(dev);
        return ret;
@@ -245,6 +248,7 @@ static void blktrans_release(struct gendisk *disk, fmode_t mode)
                return;
 
        mutex_lock(&dev->lock);
+       mutex_lock(&mtd_table_mutex);
 
        if (--dev->open)
                goto unlock;
@@ -258,6 +262,7 @@ static void blktrans_release(struct gendisk *disk, fmode_t mode)
                __put_mtd_device(dev->mtd);
        }
 unlock:
+       mutex_unlock(&mtd_table_mutex);
        mutex_unlock(&dev->lock);
        blktrans_dev_put(dev);
 }