From: Jens Axboe axboe@kernel.dk
commit 3e9900f3bd7ba30d60f82b162b70a1dffe4e8e24 upstream.
The revert of the removal of this driver happened after we fixed up the split limits for NOWAIT issue, hence it got missed. Ensure that we check for a NULL bio after splitting, in case it should be retried.
Marking this as fixing both commits, so that stable backport will do this correctly.
Cc: stable@vger.kernel.org Fixes: 9cea62b2cbab ("block: don't allow splitting of a REQ_NOWAIT bio") Fixes: 4b83e99ee709 ("Revert "pktcdvd: remove driver."") Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/block/pktcdvd.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/block/pktcdvd.c +++ b/drivers/block/pktcdvd.c @@ -2400,6 +2400,8 @@ static void pkt_submit_bio(struct bio *b struct bio *split;
bio = bio_split_to_limits(bio); + if (!bio) + return;
pkt_dbg(2, pd, "start = %6llx stop = %6llx\n", (unsigned long long)bio->bi_iter.bi_sector,