block: initialize ret in bdev_disk_changed

Avoid a potentially initialized variabe in the invalidate case.

Fixes: d3c4a43d9291 ("block: refactor blk_drop_partitions")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20210408194140.1816537-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 594a1be..363015f 100644 (file)
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1236,7 +1236,7 @@ static void __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part);
 int bdev_disk_changed(struct block_device *bdev, bool invalidate)
 {
        struct gendisk *disk = bdev->bd_disk;
-       int ret;
+       int ret = 0;
 
        lockdep_assert_held(&bdev->bd_mutex);