This is a note to let you know that I've just added the patch titled
scsi: core: Add scsi_prot_ref_tag() helper
to the 5.10-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-core-add-scsi_prot_ref_tag-helper.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f77fc8490ddd94125be1894caf9c7fa893648b19
Author: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Date: Tue Jun 8 23:39:15 2021 -0400
scsi: core: Add scsi_prot_ref_tag() helper
[ Upstream commit 7ba46799d34695534666a3f71a2be10ea85ece6c ]
We are about to remove the request pointer from struct scsi_cmnd and that
will complicate getting to the ref_tag via t10_pi_ref_tag() in the various
drivers. Introduce a helper function to retrieve the reference tag so
drivers will not have to worry about the details.
Link: https://lore.kernel.org/r/20210609033929.3815-2-martin.petersen@xxxxxxxxxx
Reviewed-by: Bart Van Assche <bvanassche@xxxxxxx>
Reviewed-by: Benjamin Block <bblock@xxxxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Message-Id: <20210609033929.3815-2-martin.petersen@xxxxxxxxxx>
Stable-dep-of: 066c5b46b6ea ("scsi: core: Always send batch on reset or error handling command")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h
index b1c9b52876f3c..6630464635330 100644
--- a/include/scsi/scsi_cmnd.h
+++ b/include/scsi/scsi_cmnd.h
@@ -291,6 +291,13 @@ static inline sector_t scsi_get_lba(struct scsi_cmnd *scmd)
return blk_rq_pos(scmd->request);
}
+static inline u32 scsi_prot_ref_tag(struct scsi_cmnd *scmd)
+{
+ struct request *rq = blk_mq_rq_from_pdu(scmd);
+
+ return t10_pi_ref_tag(rq);
+}
+
static inline unsigned int scsi_prot_interval(struct scsi_cmnd *scmd)
{
return scmd->device->sector_size;
