This is a note to let you know that I've just added the patch titled
tcm_loop: Fixup tag handling
to the 3.14-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:
tcm_loop-fixup-tag-handling.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 6375f8908255ea7438b60bb5998e6b3e1628500d Mon Sep 17 00:00:00 2001
From: Hannes Reinecke <hare@xxxxxxx>
Date: Thu, 2 Oct 2014 09:30:55 +0200
Subject: tcm_loop: Fixup tag handling
From: Hannes Reinecke <hare@xxxxxxx>
commit 6375f8908255ea7438b60bb5998e6b3e1628500d upstream.
The SCSI command tag is set to the tag assigned from the block
layer, not the SCSI-II tag message. So we need to convert
it into the correct SCSI-II tag message based on the
device flags, not the tag value itself.
Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
Reviewed-by: Sagi Grimberg <sagig@xxxxxxxxxxxx>
Signed-off-by: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/target/loopback/tcm_loop.c | 21 +++++++--------------
1 file changed, 7 insertions(+), 14 deletions(-)
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -153,18 +153,11 @@ static int tcm_loop_change_queue_type(st
/*
* Locate the SAM Task Attr from struct scsi_cmnd *
*/
-static int tcm_loop_sam_attr(struct scsi_cmnd *sc)
+static int tcm_loop_sam_attr(struct scsi_cmnd *sc, int tag)
{
- if (sc->device->tagged_supported) {
- switch (sc->tag) {
- case HEAD_OF_QUEUE_TAG:
- return MSG_HEAD_TAG;
- case ORDERED_QUEUE_TAG:
- return MSG_ORDERED_TAG;
- default:
- break;
- }
- }
+ if (sc->device->tagged_supported &&
+ sc->device->ordered_tags && tag >= 0)
+ return MSG_ORDERED_TAG;
return MSG_SIMPLE_TAG;
}
@@ -214,7 +207,7 @@ static void tcm_loop_submission_work(str
}
rc = target_submit_cmd_map_sgls(se_cmd, tl_nexus->se_sess, sc->cmnd,
&tl_cmd->tl_sense_buf[0], tl_cmd->sc->device->lun,
- scsi_bufflen(sc), tcm_loop_sam_attr(sc),
+ scsi_bufflen(sc), tcm_loop_sam_attr(sc, tl_cmd->sc_cmd_tag),
sc->sc_data_direction, 0,
scsi_sglist(sc), scsi_sg_count(sc),
sgl_bidi, sgl_bidi_count,
@@ -252,7 +245,7 @@ static int tcm_loop_queuecommand(struct
}
tl_cmd->sc = sc;
- tl_cmd->sc_cmd_tag = sc->tag;
+ tl_cmd->sc_cmd_tag = sc->request->tag;
INIT_WORK(&tl_cmd->work, tcm_loop_submission_work);
queue_work(tcm_loop_workqueue, &tl_cmd->work);
return 0;
@@ -356,7 +349,7 @@ static int tcm_loop_abort_task(struct sc
*/
tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id];
ret = tcm_loop_issue_tmr(tl_tpg, tl_nexus, sc->device->lun,
- sc->tag, TMR_ABORT_TASK);
+ sc->request->tag, TMR_ABORT_TASK);
return (ret == TMR_FUNCTION_COMPLETE) ? SUCCESS : FAILED;
}
Patches currently in stable-queue which might be from hare@xxxxxxx are
queue-3.14/tcm_loop-fixup-tag-handling.patch
queue-3.14/tcm_loop-fix-wrong-i_t-nexus-association.patch
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