[SCSI] qla2xxx: Correct vport configuration-change handling.

Upon having configuration changes on vports only, the driver
handles SCR regardless physical port state and, in turn, it
results mailbox error as below:

	Mar 20 11:24:20 dl585 kernel: qla2x00_mailbox_command(9): **** FAILED.  mbx0=4005, mbx1=1, mbx2=8100, cmd=70 ****

With the changes, driver checks physical port loop_state and make
sure the port is ready to take commands.
Signed-off-by: Seokmann Ju <seokmann.ju@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/qla2xxx/qla_mid.c

@@ -254,9 +254,17 @@ qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
 static int
 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
 {
+	scsi_qla_host_t *ha = vha->parent;
+
 	if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
 		/* VP acquired. complete port configuration */
+		if (atomic_read(&ha->loop_state) == LOOP_READY) {
 			qla24xx_configure_vp(vha);
+		} else {
+			set_bit(VP_IDX_ACQUIRED, &vha->vp_flags);
+			set_bit(VP_DPC_NEEDED, &ha->dpc_flags);
+		}
+
 		return 0;
 	}