From: Mike Snitzer snitzer@kernel.org
commit 78ccef91234ba331c04d71f3ecb1377451d21056 upstream.
Commit 5291984004edf ("dm: fix bio polling to handle possibile BLK_STS_AGAIN") inadvertently introduced an early return from dm_io_complete() without first queueing the bio to DM if BLK_STS_AGAIN occurs and bio-polling is _not_ being used.
Fix this by only returning early from dm_io_complete() if the bio has first been properly queued to DM. Otherwise, the bio will never finish via bio_endio.
Fixes: 5291984004edf ("dm: fix bio polling to handle possibile BLK_STS_AGAIN") Cc: stable@vger.kernel.org Signed-off-by: Mike Snitzer snitzer@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/md/dm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -899,9 +899,11 @@ static void dm_io_complete(struct dm_io if (io_error == BLK_STS_AGAIN) { /* io_uring doesn't handle BLK_STS_AGAIN (yet) */ queue_io(md, bio); + return; } } - return; + if (io_error == BLK_STS_DM_REQUEUE) + return; }
if (bio_is_flush_with_data(bio)) {