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=-5.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,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 B55A1ECE561 for ; Mon, 24 Sep 2018 12:25:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7BB9921486 for ; Mon, 24 Sep 2018 12:25:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7BB9921486 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1733010AbeIXS1l (ORCPT ); Mon, 24 Sep 2018 14:27:41 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:57024 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730683AbeIXS1j (ORCPT ); Mon, 24 Sep 2018 14:27:39 -0400 Received: from localhost (ip-213-127-77-73.ip.prioritytelecom.net [213.127.77.73]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 17E9F108B; Mon, 24 Sep 2018 12:25:45 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Benjamin Poirier , Aaron Brown , Jeff Kirsher , Ben Hutchings Subject: [PATCH 4.14 167/173] e1000e: Remove Other from EIAC Date: Mon, 24 Sep 2018 13:53:21 +0200 Message-Id: <20180924113127.289044233@linuxfoundation.org> X-Mailer: git-send-email 2.19.0 In-Reply-To: <20180924113114.334025954@linuxfoundation.org> References: <20180924113114.334025954@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Benjamin Poirier commit 745d0bd3af99ccc8c5f5822f808cd133eadad6ac upstream. It was reported that emulated e1000e devices in vmware esxi 6.5 Build 7526125 do not link up after commit 4aea7a5c5e94 ("e1000e: Avoid receiver overrun interrupt bursts", v4.15-rc1). Some tracing shows that after e1000e_trigger_lsc() is called, ICR reads out as 0x0 in e1000_msix_other() on emulated e1000e devices. In comparison, on real e1000e 82574 hardware, icr=0x80000004 (_INT_ASSERTED | _LSC) in the same situation. Some experimentation showed that this flaw in vmware e1000e emulation can be worked around by not setting Other in EIAC. This is how it was before 16ecba59bc33 ("e1000e: Do not read ICR in Other interrupt", v4.5-rc1). Fixes: 4aea7a5c5e94 ("e1000e: Avoid receiver overrun interrupt bursts") Signed-off-by: Benjamin Poirier Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher Cc: Ben Hutchings Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/intel/e1000e/netdev.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -1914,6 +1914,8 @@ static irqreturn_t e1000_msix_other(int bool enable = true; icr = er32(ICR); + ew32(ICR, E1000_ICR_OTHER); + if (icr & E1000_ICR_RXO) { ew32(ICR, E1000_ICR_RXO); enable = false; @@ -2036,7 +2038,6 @@ static void e1000_configure_msix(struct hw->hw_addr + E1000_EITR_82574(vector)); else writel(1, hw->hw_addr + E1000_EITR_82574(vector)); - adapter->eiac_mask |= E1000_IMS_OTHER; /* Cause Tx interrupts on every write back */ ivar |= BIT(31); @@ -2261,7 +2262,7 @@ static void e1000_irq_enable(struct e100 if (adapter->msix_entries) { ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574); - ew32(IMS, adapter->eiac_mask | E1000_IMS_LSC); + ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC); } else if (hw->mac.type >= e1000_pch_lpt) { ew32(IMS, IMS_ENABLE_MASK | E1000_IMS_ECCER); } else {