IB/qib: Return correct MAD when setting link width to 255

Fix a bug which causes the driver to return incorrect MADs as a
response to Set(PortInfo) which sets the link width to 0xFF or link
speed to 0xF.
Signed-off-by: Mitko Haralanov <mitko@qlogic.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

drivers/infiniband/hw/qib/qib_mad.c

@@ -705,7 +705,7 @@ static int subn_set_portinfo(struct ib_smp *smp, struct ib_device *ibdev,
 	lwe = pip->link_width_enabled;
 	if (lwe) {
 		if (lwe == 0xFF)
-			lwe = ppd->link_width_supported;
+			set_link_width_enabled(ppd, ppd->link_width_supported);
 		else if (lwe >= 16 || (lwe & ~ppd->link_width_supported))
 			smp->status |= IB_SMP_INVALID_FIELD;
 		else if (lwe != ppd->link_width_enabled)
@@ -720,7 +720,8 @@ static int subn_set_portinfo(struct ib_smp *smp, struct ib_device *ibdev,
 		 * speeds.
 		 */
 		if (lse == 15)
-			lse = ppd->link_speed_supported;
+			set_link_speed_enabled(ppd,
+					       ppd->link_speed_supported);
 		else if (lse >= 8 || (lse & ~ppd->link_speed_supported))
 			smp->status |= IB_SMP_INVALID_FIELD;
 		else if (lse != ppd->link_speed_enabled)
@@ -849,7 +850,7 @@ static int subn_set_portinfo(struct ib_smp *smp, struct ib_device *ibdev,
 	if (clientrereg)
 		pip->clientrereg_resv_subnetto |= 0x80;
 
-	goto done;
+	goto get_only;
 
 err:
 	smp->status |= IB_SMP_INVALID_FIELD;