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authorIvan Vecera <ivecera@redhat.com>2014-04-17 14:51:08 +0200
committerDavid S. Miller <davem@davemloft.net>2014-04-18 18:01:13 -0400
commitba67b510035141bd89b40bf65efa0a79834311ca (patch)
tree2f947ee0318a8611a1a6e1e36297f7e9bb81f65e /drivers
parentdc8eaaa006350d24030502a4521542e74b5cb39f (diff)
tg3: update rx_jumbo_pending ring param only when jumbo frames are enabled
The patch fixes a problem with dropped jumbo frames after usage of 'ethtool -G ... rx'. Scenario: 1. ip link set eth0 up 2. ethtool -G eth0 rx N # <- This zeroes rx-jumbo 3. ip link set mtu 9000 dev eth0 The ethtool command set rx_jumbo_pending to zero so any received jumbo packets are dropped and you need to use 'ethtool -G eth0 rx-jumbo N' to workaround the issue. The patch changes the logic so rx_jumbo_pending value is changed only if jumbo frames are enabled (MTU > 1500). Signed-off-by: Ivan Vecera <ivecera@redhat.com> Acked-by: Michael Chan <mchan@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/ethernet/broadcom/tg3.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index b9f7022f4e8..e5d95c5ce1a 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -12286,7 +12286,9 @@ static int tg3_set_ringparam(struct net_device *dev, struct ethtool_ringparam *e
if (tg3_flag(tp, MAX_RXPEND_64) &&
tp->rx_pending > 63)
tp->rx_pending = 63;
- tp->rx_jumbo_pending = ering->rx_jumbo_pending;
+
+ if (tg3_flag(tp, JUMBO_RING_ENABLE))
+ tp->rx_jumbo_pending = ering->rx_jumbo_pending;
for (i = 0; i < tp->irq_max; i++)
tp->napi[i].tx_pending = ering->tx_pending;