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scsi: zfcp: fix missing trace records for early returns in TMF eh handlers 

For problem determination we need to see that we were in scsi_eh
as well as whether and why we were successful or not.

The following commits introduced new early returns without adding
a trace record:

v2.6.35 commit a1dbfddd02
("[SCSI] zfcp: Pass return code from fc_block_scsi_eh to scsi eh")
on fc_block_scsi_eh() returning != 0 which is FAST_IO_FAIL,

v2.6.30 commit 63caf367e1
("[SCSI] zfcp: Improve reliability of SCSI eh handlers in zfcp")
on not having gotten an FSF request after the maximum number of retry
attempts and thus could not issue a TMF and has to return FAILED.

Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com>
Fixes: a1dbfddd02 ("[SCSI] zfcp: Pass return code from fc_block_scsi_eh to scsi eh")
Fixes: 63caf367e1 ("[SCSI] zfcp: Improve reliability of SCSI eh handlers in zfcp")
Cc: <stable@vger.kernel.org> #2.6.38+
Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com>
Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Steffen Maier 2017-07-28 12:30:55 +02:00 committed by Martin K. Petersen
parent 9fe5d2b2fd
commit 1a5d999ebf
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/s390/scsi/zfcp_scsi.c
View File

@ -273,8 +273,10 @@ static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
zfcp_erp_wait(adapter);
ret = fc_block_scsi_eh(scpnt);
if (ret)
if (ret) {
zfcp_dbf_scsi_devreset("fiof", scpnt, tm_flags, NULL);
return ret;
}
if (!(atomic_read(&adapter->status) &
ZFCP_STATUS_COMMON_RUNNING)) {
@ -282,8 +284,10 @@ static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
return SUCCESS;
}
}
if (!fsf_req)
if (!fsf_req) {
zfcp_dbf_scsi_devreset("reqf", scpnt, tm_flags, NULL);
return FAILED;
}
wait_for_completion(&fsf_req->completion);