scsi: zfcp: auto variables for dereferenced structs in open port handler

Introduce automatic variables for adapter and QTCB bottom in
zfcp_fsf_open_port_handler(). This facilitates subsequent changes to meet
the 80 character per line limit.

Link: https://lore.kernel.org/r/20200312174505.51294-6-maier@linux.ibm.com
Reviewed-by: Fedor Loshakov <loshakov@linux.ibm.com>
Reviewed-by: Steffen Maier <maier@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Jens Remus <jremus@linux.ibm.com>
Signed-off-by: Steffen Maier <maier@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index 1fa9427..c3aa054 100644 (file)
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -4,7 +4,7 @@
  *
  * Implementation of FSF commands.
  *
- * Copyright IBM Corp. 2002, 2018
+ * Copyright IBM Corp. 2002, 2020
  */
 
 #define KMSG_COMPONENT "zfcp"
@@ -1499,8 +1499,10 @@ out_unlock:
 
 static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
 {
+       struct zfcp_adapter *adapter = req->adapter;
        struct zfcp_port *port = req->data;
        struct fsf_qtcb_header *header = &req->qtcb->header;
+       struct fsf_qtcb_bottom_support *bottom = &req->qtcb->bottom.support;
        struct fc_els_flogi *plogi;
 
        if (req->status & ZFCP_STATUS_FSFREQ_ERROR)
@@ -1510,7 +1512,7 @@ static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
        case FSF_PORT_ALREADY_OPEN:
                break;
        case FSF_MAXIMUM_NUMBER_OF_PORTS_EXCEEDED:
-               dev_warn(&req->adapter->ccw_device->dev,
+               dev_warn(&adapter->ccw_device->dev,
                         "Not enough FCP adapter resources to open "
                         "remote port 0x%016Lx\n",
                         (unsigned long long)port->wwpn);
@@ -1550,10 +1552,9 @@ static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req)
                 * another GID_PN straight after a port has been opened.
                 * Alternately, an ADISC/PDISC ELS should suffice, as well.
                 */
-               plogi = (struct fc_els_flogi *) req->qtcb->bottom.support.els;
-               if (req->qtcb->bottom.support.els1_length >=
-                   FSF_PLOGI_MIN_LEN)
-                               zfcp_fc_plogi_evaluate(port, plogi);
+               plogi = (struct fc_els_flogi *) bottom->els;
+               if (bottom->els1_length >= FSF_PLOGI_MIN_LEN)
+                       zfcp_fc_plogi_evaluate(port, plogi);
                break;
        case FSF_UNKNOWN_OP_SUBTYPE:
                req->status |= ZFCP_STATUS_FSFREQ_ERROR;