[SCSI] zfcp: Simplify handling of ct and els requests

Remove some redundancies in FC related code and trace:
- drop redundant data from SAN trace (local s_id that only changes
  during link down, ls_code that is already part of payload, d_id in
  ct response trace that is always the same as in ct request trace)
- use one common fsf struct to hold zfcp data for ct and els requests
- leverage common fsf struct for FC passthrough job data, allocate it
  with dd_bsg_data for passthrough requests and unify common code for
  ct and els passthrough request
- simplify callback handling in zfcp_fc

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>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/s390/scsi/zfcp_fc.h b/drivers/s390/scsi/zfcp_fc.h
index 9c787e043ff..cb2a3669a38 100644
--- a/drivers/s390/scsi/zfcp_fc.h
+++ b/drivers/s390/scsi/zfcp_fc.h
@@ -15,6 +15,7 @@
 #include <scsi/fc/fc_ns.h>
 #include <scsi/scsi_cmnd.h>
 #include <scsi/scsi_tcq.h>
+#include "zfcp_fsf.h"
 
 #define ZFCP_FC_CT_SIZE_PAGE	  (PAGE_SIZE - sizeof(struct fc_ct_hdr))
 #define ZFCP_FC_GPN_FT_ENT_PAGE	  (ZFCP_FC_CT_SIZE_PAGE \
@@ -55,7 +56,7 @@ struct zfcp_fc_gid_pn_resp {
  * @gid_pn_resp: GID_PN response data
  */
 struct zfcp_fc_gid_pn {
-	struct zfcp_send_ct ct;
+	struct zfcp_fsf_ct_els ct;
 	struct scatterlist sg_req;
 	struct scatterlist sg_resp;
 	struct zfcp_fc_gid_pn_req gid_pn_req;
@@ -90,7 +91,7 @@ struct zfcp_fc_gpn_ft_resp {
  * @sg_resp: scatter list entries for gpn_ft responses (per memory page)
  */
 struct zfcp_fc_gpn_ft {
-	struct zfcp_send_ct ct;
+	struct zfcp_fsf_ct_els ct;
 	struct scatterlist sg_req;
 	struct scatterlist sg_resp[ZFCP_FC_GPN_FT_NUM_BUFS];
 };
@@ -104,7 +105,7 @@ struct zfcp_fc_gpn_ft {
  * @adisc_resp: ELS ADISC response data
  */
 struct zfcp_fc_els_adisc {
-	struct zfcp_send_els els;
+	struct zfcp_fsf_ct_els els;
 	struct scatterlist req;
 	struct scatterlist resp;
 	struct fc_els_adisc adisc_req;