xen/blkfront: don't put bdev right after getting it

We should hang onto bdev until we're done with it.

[upstream git commit dad5cf6]
Signed-off-by: Andrew Jones <drjones@redhat.com>
[v1: Fixed up git commit description]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index cdf2d0de21e4b4902417482fc890aeb866570340..805132ae7481ddc29822ad1816352d7f6408c987 100644 (file)
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1409,7 +1409,6 @@ static int blkif_release(struct gendisk *disk, fmode_t mode)
        mutex_lock(&blkfront_mutex);
 
        bdev = bdget_disk(disk, 0);
-       bdput(bdev);
 
        if (bdev->bd_openers)
                goto out;
@@ -1440,6 +1439,7 @@ static int blkif_release(struct gendisk *disk, fmode_t mode)
        }
 
 out:
+       bdput(bdev);
        mutex_unlock(&blkfront_mutex);
        return 0;
 }