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btrfs: fix uninitialized variable warning in run_one_async_start

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With -Wmaybe-uninitialized compiler complains about ret being possibly
uninitialized, which isn't possible as the WQ_ constants are set only
from our code, however we can handle the default case and get rid of the
warning.

The value is set to BLK_STS_IOERR so it does not issue any IO and could
be potentially detected, but this is basically a "cannot happen" error.
To catch any problems during development use the assert.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ set the error in default: ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2022-12-16 15:15:51 -05:00 committed by David Sterba
parent cd30d3bc78
commit a6ca692ec2
1 changed files with 4 additions and 0 deletions
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4
fs/btrfs/disk-io.c
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@ -717,6 +717,10 @@ static void run_one_async_start(struct btrfs_work *work)
ret = btrfs_submit_bio_start_direct_io(async->inode,
async->bio, async->dio_file_offset);
break;
default:
/* Can't happen so return something that would prevent the IO. */
ret = BLK_STS_IOERR;
ASSERT(0);
}
if (ret)
async->status = ret;