lkml.org 
[lkml]   [2014]   [Jul]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3.15 006/122] scsi_error: fix invalid setting of host byte
Date
3.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ulrich Obergfell <uobergfe@redhat.com>

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@redhat.com>
[Fix all instances according to review comments. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
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:



\
 
 \ /
  Last update: 2014-07-08 05:41    [W:2.124 / U:0.032 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site