This is a note to let you know that I've just added the patch titled
scsi_error: fix invalid setting of host byte
to the 3.15-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_error-fix-invalid-setting-of-host-byte.patch
and it can be found in the queue-3.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8922a908908ff947f1f211e07e2e97f1169ad3cb Mon Sep 17 00:00:00 2001
From: Ulrich Obergfell <uobergfe@xxxxxxxxxx>
Date: Wed, 4 Jun 2014 13:34:57 +0200
Subject: scsi_error: fix invalid setting of host byte
From: Ulrich Obergfell <uobergfe@xxxxxxxxxx>
commit 8922a908908ff947f1f211e07e2e97f1169ad3cb upstream.
After scsi_try_to_abort_cmd returns, the eh_abort_handler may have
already found that the command has completed in the device, causing
the host_byte to be nonzero (e.g. it could be DID_ABORT). When
this happens, ORing DID_TIME_OUT into the host byte will corrupt
the result field and initiate an unwanted command retry.
Fix this by using set_host_byte instead, following the model of
commit 2082ebc45af9c9c648383b8cde0dc1948eadbf31.
Signed-off-by: Ulrich Obergfell <uobergfe@xxxxxxxxxx>
[Fix all instances according to review comments. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Ewan D. Milne <emilne@xxxxxxxxxx>
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/scsi_error.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -131,7 +131,7 @@ scmd_eh_abort_handler(struct work_struct
"aborting command %p\n", scmd));
rtn = scsi_try_to_abort_cmd(sdev->host->hostt, scmd);
if (rtn == SUCCESS) {
- scmd->result |= DID_TIME_OUT << 16;
+ set_host_byte(scmd, DID_TIME_OUT);
if (scsi_host_eh_past_deadline(sdev->host)) {
SCSI_LOG_ERROR_RECOVERY(3,
scmd_printk(KERN_INFO, scmd,
@@ -167,7 +167,7 @@ scmd_eh_abort_handler(struct work_struct
scmd_printk(KERN_WARNING, scmd,
"scmd %p terminate "
"aborted command\n", scmd));
- scmd->result |= DID_TIME_OUT << 16;
+ set_host_byte(scmd, DID_TIME_OUT);
scsi_finish_command(scmd);
}
}
@@ -291,7 +291,7 @@ enum blk_eh_timer_return scsi_times_out(
if (scsi_abort_command(scmd) == SUCCESS)
return BLK_EH_NOT_HANDLED;
- scmd->result |= DID_TIME_OUT << 16;
+ set_host_byte(scmd, DID_TIME_OUT);
if (unlikely(rtn == BLK_EH_NOT_HANDLED &&
!scsi_eh_scmd_add(scmd, SCSI_EH_CANCEL_CMD)))
@@ -1776,7 +1776,7 @@ int scsi_decide_disposition(struct scsi_
break;
case DID_ABORT:
if (scmd->eh_eflags & SCSI_EH_ABORT_SCHEDULED) {
- scmd->result |= DID_TIME_OUT << 16;
+ set_host_byte(scmd, DID_TIME_OUT);
return SUCCESS;
}
case DID_NO_CONNECT:
Patches currently in stable-queue which might be from uobergfe@xxxxxxxxxx are
queue-3.15/scsi_error-fix-invalid-setting-of-host-byte.patch
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