Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754691AbaFCLml (ORCPT ); Tue, 3 Jun 2014 07:42:41 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:43785 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754625AbaFCLmf (ORCPT ); Tue, 3 Jun 2014 07:42:35 -0400 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Ivan Vecera , "David S. Miller" , Luis Henriques Subject: [PATCH 3.11 108/138] tg3: update rx_jumbo_pending ring param only when jumbo frames are enabled Date: Tue, 3 Jun 2014 12:39:14 +0100 Message-Id: <1401795584-22664-109-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1401795584-22664-1-git-send-email-luis.henriques@canonical.com> References: <1401795584-22664-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.11 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.11.10.11 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Ivan Vecera commit ba67b510035141bd89b40bf65efa0a79834311ca upstream. 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 Acked-by: Michael Chan Signed-off-by: David S. Miller Signed-off-by: Luis Henriques --- drivers/net/ethernet/broadcom/tg3.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 17822c53ff82..35f66f680aed 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -12148,7 +12148,9 @@ 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; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/