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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 129AEC3815B for ; Mon, 20 Apr 2020 12:51:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E3814206D4 for ; Mon, 20 Apr 2020 12:51:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587387103; bh=PMPsZAyKkO1vYVopSB3WRyEZCJka8hrgwZwx7kCYqug=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=IMxDEr8Blrjc2cqbAGGvEtz9Jq9cGatnKels9bTynryjitiqUoUVaH0fdDAQ6AsL1 O3B8obU8us6+PmC9EH/R0VJeepljqholx1m0NBC/2EVZmjBZ2bURo/oCDXbYCdYYyx aQEt/A0a+eM14VvD7rh8dOOqG8yJMgpnucJSiLT4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729208AbgDTMsN (ORCPT ); Mon, 20 Apr 2020 08:48:13 -0400 Received: from mail.kernel.org ([198.145.29.99]:44708 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729206AbgDTMsM (ORCPT ); Mon, 20 Apr 2020 08:48:12 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 8E309206DD; Mon, 20 Apr 2020 12:48:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587386892; bh=PMPsZAyKkO1vYVopSB3WRyEZCJka8hrgwZwx7kCYqug=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GJXwV6fQ3TbUvr6OzlUnLuJrbNFHZfpBPvwbmq9dBInM492SfVfML64mBexZ+9v3e ju/WuoUgvxvS9iPu2ZVs2HhXvBGyhUuviHZ0FhWv6om2q+l6wvFffO6zL/W6rqd2UK nAequH2EbGM8ZoIIEQ5lI6W5ph2lE5Bjxz6FOjMw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Sebastian Andrzej Siewior , Tom Lendacky , "David S. Miller" Subject: [PATCH 4.19 01/40] amd-xgbe: Use __napi_schedule() in BH context Date: Mon, 20 Apr 2020 14:39:11 +0200 Message-Id: <20200420121449.587223612@linuxfoundation.org> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200420121444.178150063@linuxfoundation.org> References: <20200420121444.178150063@linuxfoundation.org> User-Agent: quilt/0.66 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Sebastian Andrzej Siewior [ Upstream commit d518691cbd3be3dae218e05cca3f3fc9b2f1aa77 ] The driver uses __napi_schedule_irqoff() which is fine as long as it is invoked with disabled interrupts by everybody. Since the commit mentioned below the driver may invoke xgbe_isr_task() in tasklet/softirq context. This may lead to list corruption if another driver uses __napi_schedule_irqoff() in IRQ context. Use __napi_schedule() which safe to use from IRQ and softirq context. Fixes: 85b85c853401d ("amd-xgbe: Re-issue interrupt if interrupt status not cleared") Signed-off-by: Sebastian Andrzej Siewior Acked-by: Tom Lendacky Cc: Tom Lendacky Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/amd/xgbe/xgbe-drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c +++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c @@ -515,7 +515,7 @@ static void xgbe_isr_task(unsigned long xgbe_disable_rx_tx_ints(pdata); /* Turn on polling */ - __napi_schedule_irqoff(&pdata->napi); + __napi_schedule(&pdata->napi); } } else { /* Don't clear Rx/Tx status if doing per channel DMA