[SCSI] zfcp: Correctly query end flag in gpn_ft response
Christof Schmitt [Thu, 21 Aug 2008 11:43:33 +0000 (13:43 +0200)]
When the last port entry in the gpn_ft response is already a known
port, the eval function would skip the end flag and try to attach
ports with wwpn 0. Fix this by checking the flag first.

Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Martin Petermann <martin@linux.vnet.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/s390/scsi/zfcp_fc.c

index e984469..27edabe 100644 (file)
@@ -475,7 +475,7 @@ static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft)
        struct zfcp_adapter *adapter = ct->port->adapter;
        struct zfcp_port *port, *tmp;
        u32 d_id;
-       int ret = 0, x;
+       int ret = 0, x, last = 0;
 
        if (ct->status)
                return -EIO;
@@ -492,12 +492,13 @@ static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft)
        down(&zfcp_data.config_sema);
 
        /* first entry is the header */
-       for (x = 1; x < ZFCP_GPN_FT_MAX_ENTRIES; x++) {
+       for (x = 1; x < ZFCP_GPN_FT_MAX_ENTRIES && !last; x++) {
                if (x % (ZFCP_GPN_FT_ENTRIES + 1))
                        acc++;
                else
                        acc = sg_virt(++sg);
 
+               last = acc->control & 0x80;
                d_id = acc->port_id[0] << 16 | acc->port_id[1] << 8 |
                       acc->port_id[2];
 
@@ -513,8 +514,6 @@ static int zfcp_scan_eval_gpn_ft(struct zfcp_gpn_ft *gpn_ft)
                        ret = PTR_ERR(port);
                else
                        zfcp_erp_port_reopen(port, 0, 149, NULL);
-               if (acc->control & 0x80) /* last entry */
-                       break;
        }
 
        zfcp_erp_wait(adapter);