be2net: disable RSS when number of RXQs is reduced to 1 via set-channels

When *only* the default RXQ is used, the RSS policy must be disabled so
that all IP and no-IP traffic is placed into the default RXQ. If not,
IP traffic is dropped.

Also, issue the RSS_CONFIG cmd only if FW advertises RSS capability for
the interface.
Signed-off-by: Vasundhara Volam <vasundhara.volam@emulex.com>
Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/emulex/benet/be_cmds.c b/drivers/net/ethernet/emulex/benet/be_cmds.c
index e0e8bc1..b84902e 100644 (file)
--- a/drivers/net/ethernet/emulex/benet/be_cmds.c
+++ b/drivers/net/ethernet/emulex/benet/be_cmds.c
@@ -2017,6 +2017,9 @@ int be_cmd_rss_config(struct be_adapter *adapter, u8 *rsstable,
                        0x3ea83c02, 0x4a110304};
        int status;
 
+       if (!(be_if_cap_flags(adapter) & BE_IF_FLAGS_RSS))
+               return 0;
+
        if (mutex_lock_interruptible(&adapter->mbox_lock))
                return -1;
 

diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 0fde69d..6b774a5 100644 (file)
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -2744,13 +2744,16 @@ static int be_rx_qs_create(struct be_adapter *adapter)
                if (!BEx_chip(adapter))
                        adapter->rss_flags |= RSS_ENABLE_UDP_IPV4 |
                                                RSS_ENABLE_UDP_IPV6;
+       } else {
+               /* Disable RSS, if only default RX Q is created */
+               adapter->rss_flags = RSS_ENABLE_NONE;
+       }
 
-               rc = be_cmd_rss_config(adapter, rsstable, adapter->rss_flags,
-                                      128);
-               if (rc) {
-                       adapter->rss_flags = 0;
-                       return rc;
-               }
+       rc = be_cmd_rss_config(adapter, rsstable, adapter->rss_flags,
+                              128);
+       if (rc) {
+               adapter->rss_flags = RSS_ENABLE_NONE;
+               return rc;
        }
 
        /* First time posting */