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authorSteffen Maier <maier@linux.vnet.ibm.com>2017-07-28 12:30:55 +0200
committerMartin K. Petersen <martin.petersen@oracle.com>2017-08-10 19:36:56 -0400
commit1a5d999ebfc7bfe28deb48931bb57faa8e4102b6 (patch)
tree7fd645fc4f5349391e924d66636eff64a3af00ec /drivers/s390/scsi
parent9fe5d2b2fd30aa8c7827ec62cbbe6d30df4fe3e3 (diff)
downloadop-kernel-dev-1a5d999ebfc7bfe28deb48931bb57faa8e4102b6.zip
op-kernel-dev-1a5d999ebfc7bfe28deb48931bb57faa8e4102b6.tar.gz
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 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>
Diffstat (limited to 'drivers/s390/scsi')
-rw-r--r--drivers/s390/scsi/zfcp_scsi.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
index 4c9ac55..ec3ddd1 100644
--- a/drivers/s390/scsi/zfcp_scsi.c
+++ b/drivers/s390/scsi/zfcp_scsi.c
@@ -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);
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