From patchwork Mon Dec 15 19:26:50 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamal Mostafa X-Patchwork-Id: 421667 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) by ozlabs.org (Postfix) with ESMTP id 6F0111400DE; Tue, 16 Dec 2014 06:34:57 +1100 (AEDT) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1Y0bPz-00077U-1o; Mon, 15 Dec 2014 19:34:55 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1Y0bP3-0006i1-Cb for kernel-team@lists.ubuntu.com; Mon, 15 Dec 2014 19:33:57 +0000 Received: from c-76-102-4-12.hsd1.ca.comcast.net ([76.102.4.12] helo=fourier) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1Y0bIV-0005L4-UK; Mon, 15 Dec 2014 19:27:12 +0000 Received: from kamal by fourier with local (Exim 4.82) (envelope-from ) id 1Y0bIU-0006mN-6v; Mon, 15 Dec 2014 11:27:10 -0800 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Subject: [PATCH 3.13.y-ckt 90/96] tg3: fix ring init when there are more TX than RX channels Date: Mon, 15 Dec 2014 11:26:50 -0800 Message-Id: <1418671616-25482-91-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1418671616-25482-1-git-send-email-kamal@canonical.com> References: <1418671616-25482-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.13 Cc: Kamal Mostafa , Thadeu Lima de Souza Cascardo , "David S. Miller" X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.14 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: kernel-team-bounces@lists.ubuntu.com 3.13.11-ckt13 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Thadeu Lima de Souza Cascardo [ Upstream commit a620a6bc1c94c22d6c312892be1e0ae171523125 ] If TX channels are set to 4 and RX channels are set to less than 4, using ethtool -L, the driver will try to initialize more RX channels than it has allocated, causing an oops. This fix only initializes the RX ring if it has been allocated. Signed-off-by: Thadeu Lima de Souza Cascardo Signed-off-by: David S. Miller Signed-off-by: Kamal Mostafa --- drivers/net/ethernet/broadcom/tg3.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 1b84139..bbb9bd9 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -8532,7 +8532,8 @@ static int tg3_init_rings(struct tg3 *tp) if (tnapi->rx_rcb) memset(tnapi->rx_rcb, 0, TG3_RX_RCB_RING_BYTES(tp)); - if (tg3_rx_prodring_alloc(tp, &tnapi->prodring)) { + if (tnapi->prodring.rx_std && + tg3_rx_prodring_alloc(tp, &tnapi->prodring)) { tg3_free_rings(tp); return -ENOMEM; }