From patchwork Wed Jun 3 23:31:02 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Keller, Jacob E" X-Patchwork-Id: 480320 X-Patchwork-Delegate: jeffrey.t.kirsher@intel.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from silver.osuosl.org (silver.osuosl.org [140.211.166.136]) by ozlabs.org (Postfix) with ESMTP id 26D931401EF for ; Thu, 4 Jun 2015 09:31:39 +1000 (AEST) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 35AF23292A; Wed, 3 Jun 2015 23:31:38 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id UApzpuk3G2BI; Wed, 3 Jun 2015 23:31:33 +0000 (UTC) Received: from ash.osuosl.org (ash.osuosl.org [140.211.166.34]) by silver.osuosl.org (Postfix) with ESMTP id 9A88732972; Wed, 3 Jun 2015 23:31:25 +0000 (UTC) X-Original-To: intel-wired-lan@lists.osuosl.org Delivered-To: intel-wired-lan@lists.osuosl.org Received: from whitealder.osuosl.org (whitealder.osuosl.org [140.211.166.138]) by ash.osuosl.org (Postfix) with ESMTP id 1AA691BFA20 for ; Wed, 3 Jun 2015 23:31:22 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 164DE8D175 for ; Wed, 3 Jun 2015 23:31:22 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 0scap21y+Mg5 for ; Wed, 3 Jun 2015 23:31:20 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by whitealder.osuosl.org (Postfix) with ESMTP id 0BE7D8D1EC for ; Wed, 3 Jun 2015 23:31:19 +0000 (UTC) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga103.fm.intel.com with ESMTP; 03 Jun 2015 16:31:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,549,1427785200"; d="scan'208";a="581683031" Received: from jekeller-desk.amr.corp.intel.com (HELO jekeller-desk.jekeller.internal) ([134.134.3.151]) by orsmga003.jf.intel.com with ESMTP; 03 Jun 2015 16:31:14 -0700 From: Jacob Keller To: Intel Wired LAN Date: Wed, 3 Jun 2015 16:31:02 -0700 Message-Id: <1433374272-6684-6-git-send-email-jacob.e.keller@intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1433374272-6684-1-git-send-email-jacob.e.keller@intel.com> References: <1433374272-6684-1-git-send-email-jacob.e.keller@intel.com> Subject: [Intel-wired-lan] [rc2 05/15] fm10k: add call to fm10k_clean_all_rx_rings in fm10k_down X-BeenThere: intel-wired-lan@lists.osuosl.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-wired-lan-bounces@lists.osuosl.org Sender: "Intel-wired-lan" This prevents a memory leak in fm10k_set_ringparams. The leak occurs because we go down, change ring parameters, and then come up. However, fm10k_down on its own is not clearing the Rx rings. Since fm10k_up assumes the rings are clean we basically drop the buffers and leak a bunch of memory. Eventually we hit dirty page faults and reboot the system. This issue does not occur elsewhere because other flows that involve fm10k_down go through fm10k_close which immediately called fm10k_free_all_rx_resources which properly cleans the rings. Signed-off-by: Jacob Keller Signed-off-by: Jacob Keller Tested-By: Krishneil Singh --- drivers/net/ethernet/intel/fm10k/fm10k_pci.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c index df9fda38bdd1..445014a49de7 100644 --- a/drivers/net/ethernet/intel/fm10k/fm10k_pci.c +++ b/drivers/net/ethernet/intel/fm10k/fm10k_pci.c @@ -1559,6 +1559,7 @@ void fm10k_down(struct fm10k_intfc *interface) /* free any buffers still on the rings */ fm10k_clean_all_tx_rings(interface); + fm10k_clean_all_rx_rings(interface); } /**