[SCSI] qla2xxx: Skip RSCN processing on vha if event is global.

The RSCN processing is skipped if the event received is global and vha is not recipient.

Signed-off-by: Santosh Vernekar <santosh.vernekar@qlogic.com>
Signed-off-by: Giridhar Malavali <giridhar.malavali@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 20 insertions, 4 deletions

diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 417a9b9fb19c..00f23d20a983 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -598,10 +598,26 @@ skip_rio:
                 break;
 
         case MBA_PORT_UPDATE:           /* Port database update */
-                /* Only handle SCNs for our Vport index. */
-                if (mb[1] != 0xffff &&
-                    vha->vp_idx && vha->vp_idx != (mb[3] & 0xff))
-                        break;
+                /*
+                 * Handle only global and vn-port update events
+                 *
+                 * Relevant inputs:
+                 * mb[1] = N_Port handle of changed port
+                 * OR 0xffff for global event
+                 * mb[2] = New login state
+                 * 7 = Port logged out
+                 * mb[3] = LSB is vp_idx, 0xff = all vps
+                 *
+                 * Skip processing if:
+                 *       Event is global, vp_idx is NOT all vps,
+                 *           vp_idx does not match
+                 *       Event is not global, vp_idx does not match
+                 */
+                if ((mb[1] == 0xffff && (mb[3] & 0xff) != 0xff)
+                        || (mb[1] != 0xffff)) {
+                        if (vha->vp_idx != (mb[3] & 0xff))
+                                break;
+                }
 
                 /* Global event -- port logout or port unavailable. */
                 if (mb[1] == 0xffff && mb[2] == 0x7) {