[SCSI] zfcp: Reorder FCP I/O and task management handler functions

Instead of calling the same handler for both, I/O and task management
commands, use different handlers that call a function for the common
part.

Reviewed-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index 48aa16a40d93258095519586fce33b0f8c7d511d..2b9dfea9f254e60ff2219a7094d0163e65460a19 100644 (file)
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -2080,73 +2080,7 @@ static void zfcp_fsf_req_trace(struct zfcp_fsf_req *req, struct scsi_cmnd *scsi)
                            sizeof(blktrc));
 }
 
-static void zfcp_fsf_send_fcp_command_task_handler(struct zfcp_fsf_req *req)
-{
-       struct scsi_cmnd *scpnt;
-       struct fcp_resp_with_ext *fcp_rsp;
-       unsigned long flags;
-
-       read_lock_irqsave(&req->adapter->abort_lock, flags);
-
-       scpnt = req->data;
-       if (unlikely(!scpnt)) {
-               read_unlock_irqrestore(&req->adapter->abort_lock, flags);
-               return;
-       }
-
-       if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
-               set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
-               goto skip_fsfstatus;
-       }
-
-       switch (req->qtcb->header.fsf_status) {
-       case FSF_INCONSISTENT_PROT_DATA:
-       case FSF_INVALID_PROT_PARM:
-               set_host_byte(scpnt, DID_ERROR);
-               goto skip_fsfstatus;
-       case FSF_BLOCK_GUARD_CHECK_FAILURE:
-               zfcp_scsi_dif_sense_error(scpnt, 0x1);
-               goto skip_fsfstatus;
-       case FSF_APP_TAG_CHECK_FAILURE:
-               zfcp_scsi_dif_sense_error(scpnt, 0x2);
-               goto skip_fsfstatus;
-       case FSF_REF_TAG_CHECK_FAILURE:
-               zfcp_scsi_dif_sense_error(scpnt, 0x3);
-               goto skip_fsfstatus;
-       }
-       fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
-       zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
-
-skip_fsfstatus:
-       zfcp_fsf_req_trace(req, scpnt);
-       zfcp_dbf_scsi_result(req->adapter->dbf, scpnt, req);
-
-       scpnt->host_scribble = NULL;
-       (scpnt->scsi_done) (scpnt);
-       /*
-        * We must hold this lock until scsi_done has been called.
-        * Otherwise we may call scsi_done after abort regarding this
-        * command has completed.
-        * Note: scsi_done must not block!
-        */
-       read_unlock_irqrestore(&req->adapter->abort_lock, flags);
-}
-
-static void zfcp_fsf_send_fcp_ctm_handler(struct zfcp_fsf_req *req)
-{
-       struct fcp_resp_with_ext *fcp_rsp;
-       struct fcp_resp_rsp_info *rsp_info;
-
-       fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
-       rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
-
-       if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
-            (req->status & ZFCP_STATUS_FSFREQ_ERROR))
-               req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
-}
-
-
-static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
+static void zfcp_fsf_fcp_handler_common(struct zfcp_fsf_req *req)
 {
        struct scsi_cmnd *scmnd = req->data;
        struct scsi_device *sdev = scmnd->device;
@@ -2154,7 +2088,7 @@ static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
        struct fsf_qtcb_header *header = &req->qtcb->header;
 
        if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR))
-               goto skip_fsfstatus;
+               return;
 
        switch (header->fsf_status) {
        case FSF_HANDLE_MISMATCH:
@@ -2211,12 +2145,60 @@ static void zfcp_fsf_send_fcp_command_handler(struct zfcp_fsf_req *req)
                req->status |= ZFCP_STATUS_FSFREQ_ERROR;
                break;
        }
-skip_fsfstatus:
-       if (req->status & ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT)
-               zfcp_fsf_send_fcp_ctm_handler(req);
-       else {
-               zfcp_fsf_send_fcp_command_task_handler(req);
+}
+
+static void zfcp_fsf_fcp_cmnd_handler(struct zfcp_fsf_req *req)
+{
+       struct scsi_cmnd *scpnt;
+       struct fcp_resp_with_ext *fcp_rsp;
+       unsigned long flags;
+
+       zfcp_fsf_fcp_handler_common(req);
+
+       read_lock_irqsave(&req->adapter->abort_lock, flags);
+
+       scpnt = req->data;
+       if (unlikely(!scpnt)) {
+               read_unlock_irqrestore(&req->adapter->abort_lock, flags);
+               return;
        }
+
+       if (unlikely(req->status & ZFCP_STATUS_FSFREQ_ERROR)) {
+               set_host_byte(scpnt, DID_TRANSPORT_DISRUPTED);
+               goto skip_fsfstatus;
+       }
+
+       switch (req->qtcb->header.fsf_status) {
+       case FSF_INCONSISTENT_PROT_DATA:
+       case FSF_INVALID_PROT_PARM:
+               set_host_byte(scpnt, DID_ERROR);
+               goto skip_fsfstatus;
+       case FSF_BLOCK_GUARD_CHECK_FAILURE:
+               zfcp_scsi_dif_sense_error(scpnt, 0x1);
+               goto skip_fsfstatus;
+       case FSF_APP_TAG_CHECK_FAILURE:
+               zfcp_scsi_dif_sense_error(scpnt, 0x2);
+               goto skip_fsfstatus;
+       case FSF_REF_TAG_CHECK_FAILURE:
+               zfcp_scsi_dif_sense_error(scpnt, 0x3);
+               goto skip_fsfstatus;
+       }
+       fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
+       zfcp_fc_eval_fcp_rsp(fcp_rsp, scpnt);
+
+skip_fsfstatus:
+       zfcp_fsf_req_trace(req, scpnt);
+       zfcp_dbf_scsi_result(req->adapter->dbf, scpnt, req);
+
+       scpnt->host_scribble = NULL;
+       (scpnt->scsi_done) (scpnt);
+       /*
+        * We must hold this lock until scsi_done has been called.
+        * Otherwise we may call scsi_done after abort regarding this
+        * command has completed.
+        * Note: scsi_done must not block!
+        */
+       read_unlock_irqrestore(&req->adapter->abort_lock, flags);
 }
 
 static int zfcp_fsf_set_data_dir(struct scsi_cmnd *scsi_cmnd, u32 *data_dir)
@@ -2299,7 +2281,7 @@ int zfcp_fsf_fcp_cmnd(struct scsi_cmnd *scsi_cmnd)
        io = &req->qtcb->bottom.io;
        req->status |= ZFCP_STATUS_FSFREQ_CLEANUP;
        req->data = scsi_cmnd;
-       req->handler = zfcp_fsf_send_fcp_command_handler;
+       req->handler = zfcp_fsf_fcp_cmnd_handler;
        req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
        req->qtcb->header.port_handle = zfcp_sdev->port->handle;
        io->service_class = FSF_CLASS_3;
@@ -2345,6 +2327,21 @@ out:
        return retval;
 }
 
+static void zfcp_fsf_fcp_task_mgmt_handler(struct zfcp_fsf_req *req)
+{
+       struct fcp_resp_with_ext *fcp_rsp;
+       struct fcp_resp_rsp_info *rsp_info;
+
+       zfcp_fsf_fcp_handler_common(req);
+
+       fcp_rsp = (struct fcp_resp_with_ext *) &req->qtcb->bottom.io.fcp_rsp;
+       rsp_info = (struct fcp_resp_rsp_info *) &fcp_rsp[1];
+
+       if ((rsp_info->rsp_code != FCP_TMF_CMPL) ||
+            (req->status & ZFCP_STATUS_FSFREQ_ERROR))
+               req->status |= ZFCP_STATUS_FSFREQ_TMFUNCFAILED;
+}
+
 /**
  * zfcp_fsf_fcp_task_mgmt - send SCSI task management command
  * @scmnd: SCSI command to send the task management command for
@@ -2378,7 +2375,7 @@ struct zfcp_fsf_req *zfcp_fsf_fcp_task_mgmt(struct scsi_cmnd *scmnd,
 
        req->status |= ZFCP_STATUS_FSFREQ_TASK_MANAGEMENT;
        req->data = scmnd;
-       req->handler = zfcp_fsf_send_fcp_command_handler;
+       req->handler = zfcp_fsf_fcp_task_mgmt_handler;
        req->qtcb->header.lun_handle = zfcp_sdev->lun_handle;
        req->qtcb->header.port_handle = zfcp_sdev->port->handle;
        req->qtcb->bottom.io.data_direction = FSF_DATADIR_CMND;