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

commit 1a5d999ebfc7bfe28deb48931bb57faa8e4102b6 upstream.

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 a1dbfddd02d2
("[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 63caf367e1c9
("[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: a1dbfddd02d2 ("[SCSI] zfcp: Pass return code from fc_block_scsi_eh to scsi eh")
Fixes: 63caf367e1c9 ("[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>
Signed-off-by: Willy Tarreau <w@1wt.eu>

diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index 66c37e77ac7c685c61da1e5a64987da51f4e5234..8ec101a4a5ebd5297505f71b503f8a066058d074 100644 (file)
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -294,8 +294,10 @@ 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);
                        return ret;
+               }
 
                if (!(atomic_read(&adapter->status) &
                      ZFCP_STATUS_COMMON_RUNNING)) {
@@ -303,8 +305,10 @@ 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);
                return FAILED;
+       }
 
        wait_for_completion(&fsf_req->completion);