When triggering thaw-filesystems via magic sysrq, the system enters a
loop in do_thaw_one(), as thaw_bdev() still returns success if
bd_fsfreeze_count == 0. To fix this, let thaw_bdev() always return
error (and simplify the code a bit at the same time).
Reviewed-by: Eric Farman <farman@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx>
Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxxxxxxx>
---
fs/block_dev.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 08ae993..0e7a8f4 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -302,14 +302,11 @@ int thaw_bdev(struct block_device *bdev, struct super_block *sb)
error = sb->s_op->thaw_super(sb);
else
error = thaw_super(sb);
- if (error) {
+ if (error)
bdev->bd_fsfreeze_count++;
- mutex_unlock(&bdev->bd_fsfreeze_mutex);
- return error;
- }
out:
mutex_unlock(&bdev->bd_fsfreeze_mutex);
- return 0;
+ return error;
}
EXPORT_SYMBOL(thaw_bdev);
--
2.5.0
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