bd_claim_by_disk: fix warning

Fix this:

fs/block_dev.c: In function 'bd_claim_by_disk':
fs/block_dev.c:970: warning: 'found' may be used uninitialized in this function

and given that free_bd_holder() now needs free(NULL)-is-legal behaviour, we
can simplify bd_release_from_kobject().

Cc: Bjorn Steinbrink <B.Steinbrink@gmx.de>
Cc: Johannes Weiner <hannes-kernel@saeurebad.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 7 insertions, 10 deletions

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 75c47a21b2f0..3635315e3b99 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -963,20 +963,20 @@ static int bd_claim_by_kobject(struct block_device *bdev, void *holder,
 
         err = bd_claim(bdev, holder);
         if (err)
-                goto out;
+                goto fail;
 
         found = find_bd_holder(bdev, bo);
         if (found)
-                goto out;
+                goto fail;
 
         err = add_bd_holder(bdev, bo);
         if (err)
                 bd_release(bdev);
-
-out:
-        if (err || found)
-                free_bd_holder(bo);
+        else
+                bo = NULL;
+fail:
         mutex_unlock(&bdev->bd_mutex);
+        free_bd_holder(bo);
         return err;
 }
 
@@ -991,15 +991,12 @@ out:
 static void bd_release_from_kobject(struct block_device *bdev,
                                         struct kobject *kobj)
 {
-        struct bd_holder *bo;
-
         if (!kobj)
                 return;
 
         mutex_lock(&bdev->bd_mutex);
         bd_release(bdev);
-        if ((bo = del_bd_holder(bdev, kobj)))
-                free_bd_holder(bo);
+        free_bd_holder(del_bd_holder(bdev, kobj));
         mutex_unlock(&bdev->bd_mutex);
 }