From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D3AEEC48BD9 for ; Wed, 26 Jun 2019 19:30:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A9B9F216FD for ; Wed, 26 Jun 2019 19:30:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726655AbfFZTay (ORCPT ); Wed, 26 Jun 2019 15:30:54 -0400 Received: from mga14.intel.com ([192.55.52.115]:41403 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726500AbfFZTae (ORCPT ); Wed, 26 Jun 2019 15:30:34 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Jun 2019 12:30:34 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,420,1557212400"; d="scan'208";a="188762460" Received: from jtkirshe-desk1.jf.intel.com ([134.134.177.96]) by fmsmga002.fm.intel.com with ESMTP; 26 Jun 2019 12:30:34 -0700 From: Jeff Kirsher To: davem@davemloft.net Cc: Young Xiao <92siuyang@gmail.com>, netdev@vger.kernel.org, nhorman@redhat.com, sassmann@redhat.com, Andrew Bowers , Jeff Kirsher Subject: [net-next 02/10] ixgbevf: fix possible divide by zero in ixgbevf_update_itr Date: Wed, 26 Jun 2019 12:30:55 -0700 Message-Id: <20190626193103.2169-3-jeffrey.t.kirsher@intel.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190626193103.2169-1-jeffrey.t.kirsher@intel.com> References: <20190626193103.2169-1-jeffrey.t.kirsher@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Young Xiao <92siuyang@gmail.com> The next call to ixgbevf_update_itr will continue to dynamically update ITR. Copy from commit bdbeefe8ea8c ("ixgbe: fix possible divide by zero in ixgbe_update_itr") Signed-off-by: Young Xiao <92siuyang@gmail.com> Tested-by: Andrew Bowers Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c index d189ed247665..d2b41f9f87f8 100644 --- a/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c +++ b/drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c @@ -1423,6 +1423,9 @@ static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector, */ /* what was last interrupt timeslice? */ timepassed_us = q_vector->itr >> 2; + if (timepassed_us == 0) + return; + bytes_perint = bytes / timepassed_us; /* bytes/usec */ switch (itr_setting) { -- 2.21.0