[SCSI] zfcp: Add information about interrupt to trace.

Store the index of the buffer in the inbound queue used to report
request completion in trace record for request coompletion.
This piece of information allows to better compare qdio and zfcp traces.

Signed-off-by: Martin Peschke <mp3@de.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

4 files changed, 7 insertions, 2 deletions

diff --git a/drivers/s390/scsi/zfcp_dbf.c b/drivers/s390/scsi/zfcp_dbf.c
index 0a2ffc635c7..2bad934a67a 100644
--- a/drivers/s390/scsi/zfcp_dbf.c
+++ b/drivers/s390/scsi/zfcp_dbf.c
@@ -187,6 +187,7 @@ void zfcp_hba_dbf_event_fsf_response(struct zfcp_fsf_req *fsf_req)
         response->fsf_req_status = fsf_req->status;
         response->sbal_first = fsf_req->sbal_first;
         response->sbal_last = fsf_req->sbal_last;
+        response->sbal_response = fsf_req->sbal_response;
         response->pool = fsf_req->pool != NULL;
         response->erp_action = (unsigned long)fsf_req->erp_action;
 
@@ -355,6 +356,7 @@ static void zfcp_hba_dbf_view_response(char **p,
         zfcp_dbf_out(p, "fsf_req_status", "0x%08x", r->fsf_req_status);
         zfcp_dbf_out(p, "sbal_first", "0x%02x", r->sbal_first);
         zfcp_dbf_out(p, "sbal_last", "0x%02x", r->sbal_last);
+        zfcp_dbf_out(p, "sbal_response", "0x%02x", r->sbal_response);
         zfcp_dbf_out(p, "pool", "0x%02x", r->pool);
 
         switch (r->fsf_command) {
diff --git a/drivers/s390/scsi/zfcp_dbf.h b/drivers/s390/scsi/zfcp_dbf.h
index 212622ca2e8..f71176acfab 100644
--- a/drivers/s390/scsi/zfcp_dbf.h
+++ b/drivers/s390/scsi/zfcp_dbf.h
@@ -98,6 +98,7 @@ struct zfcp_hba_dbf_record_response {
         u32 fsf_req_status;
         u8 sbal_first;
         u8 sbal_last;
+        u8 sbal_response;
         u8 pool;
         u64 erp_action;
         union {
diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h
index 210273d97f0..fc61a8ed52d 100644
--- a/drivers/s390/scsi/zfcp_def.h
+++ b/drivers/s390/scsi/zfcp_def.h
@@ -856,6 +856,7 @@ struct zfcp_fsf_req {
                                                   this reuest */
         u8                     sbale_curr;     /* current SBALE during creation
                                                   of request */
+        u8                      sbal_response;  /* SBAL used in interrupt */
         wait_queue_head_t      completion_wq;  /* can be used by a routine
                                                   to wait for completion */
         volatile u32           status;         /* status of this request */
diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c
index 8c83cdc73d9..e71547357f6 100644
--- a/drivers/s390/scsi/zfcp_qdio.c
+++ b/drivers/s390/scsi/zfcp_qdio.c
@@ -235,7 +235,7 @@ zfcp_qdio_request_handler(struct ccw_device *ccw_device,
  * zfcp_qdio_reqid_check - checks for valid reqids.
  */
 static void zfcp_qdio_reqid_check(struct zfcp_adapter *adapter,
-                                  unsigned long req_id)
+                                  unsigned long req_id, int sbal)
 {
         struct zfcp_fsf_req *fsf_req;
         unsigned long flags;
@@ -255,6 +255,7 @@ static void zfcp_qdio_reqid_check(struct zfcp_adapter *adapter,
         atomic_dec(&adapter->reqs_active);
         spin_unlock_irqrestore(&adapter->req_list_lock, flags);
 
+        fsf_req->sbal_response = sbal;
         /* finish the FSF request */
         zfcp_fsf_req_complete(fsf_req);
 }
@@ -321,7 +322,7 @@ zfcp_qdio_response_handler(struct ccw_device *ccw_device,
                         /* look for QDIO request identifiers in SB */
                         buffere = &buffer->element[buffere_index];
                         zfcp_qdio_reqid_check(adapter,
-                                              (unsigned long) buffere->addr);
+                                              (unsigned long) buffere->addr, i);
 
                         /*
                          * A single used SBALE per inbound SBALE has been