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| author | Ulrich Obergfell <uobergfe@redhat.com> | 2014-06-04 13:34:57 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-06-24 17:00:12 +0200 |
| commit | 8922a908908ff947f1f211e07e2e97f1169ad3cb (patch) | |
| tree | a1e892598591ccbea088344ae55e359c0ead64c9 | |
| parent | Merge tag 'compress-3.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff) | |
| download | linux-8922a908908ff947f1f211e07e2e97f1169ad3cb.tar.xz linux-8922a908908ff947f1f211e07e2e97f1169ad3cb.zip | |
scsi_error: fix invalid setting of host byte
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.
Cc: stable@vger.kernel.org
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>
| -rw-r--r-- | drivers/scsi/scsi_error.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index cbe38e5e7955..55ecf70fe3d9 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -131,7 +131,7 @@ scmd_eh_abort_handler(struct work_struct *work) "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 *work) 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(struct request *req) 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))) @@ -1777,7 +1777,7 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd) 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: |