This is a note to let you know that I've just added the patch titled
scsi: return correct blkprep status code in case scsi_init_io() fails.
to the 4.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-return-correct-blkprep-status-code-in-case-scsi_init_io-fails.patch
and it can be found in the queue-4.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e7661a8e5ce10b5321882d0bbaf3f81070903319 Mon Sep 17 00:00:00 2001
From: Johannes Thumshirn <jthumshirn@xxxxxxx>
Date: Wed, 12 Apr 2017 09:21:19 +0200
Subject: scsi: return correct blkprep status code in case scsi_init_io() fails.
From: Johannes Thumshirn <jthumshirn@xxxxxxx>
commit e7661a8e5ce10b5321882d0bbaf3f81070903319 upstream.
When instrumenting the SCSI layer to run into the
!blk_rq_nr_phys_segments(rq) case the following warning emitted from the
block layer:
blk_peek_request: bad return=-22
This happens because since commit fd3fc0b4d730 ("scsi: don't BUG_ON()
empty DMA transfers") we return the wrong error value from
scsi_prep_fn() back to the block layer.
[mkp: silenced checkpatch]
Signed-off-by: Johannes Thumshirn <jthumshirn@xxxxxxx>
Fixes: fd3fc0b4d730 scsi: don't BUG_ON() empty DMA transfers
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Hannes Reinecke <hare@xxxxxxxx>
Reviewed-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/scsi_lib.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1038,10 +1038,10 @@ int scsi_init_io(struct scsi_cmnd *cmd)
struct scsi_device *sdev = cmd->device;
struct request *rq = cmd->request;
bool is_mq = (rq->mq_ctx != NULL);
- int error;
+ int error = BLKPREP_KILL;
if (WARN_ON_ONCE(!blk_rq_nr_phys_segments(rq)))
- return -EINVAL;
+ goto err_exit;
error = scsi_init_sgtable(rq, &cmd->sdb);
if (error)
Patches currently in stable-queue which might be from jthumshirn@xxxxxxx are
queue-4.10/scsi-return-correct-blkprep-status-code-in-case-scsi_init_io-fails.patch