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=-9.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 82495C64E7A for ; Tue, 27 Oct 2020 18:01:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 44EFA22284 for ; Tue, 27 Oct 2020 18:01:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603821661; bh=m5PM8Aalp8ez1lWfySaxFWEGz5AJ2IA8HDibuZMhuOg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=jo64LmbZMGREMQRFy6KbhYaUnqnSeWS9KaYZcuaONs3NaO0K3WsKekTS9cxiRFNxF Q2cmnfe+bP9Mz2PrXI39Rw3Ka/MY9l3rBdlg42tPyB+uqE8AbZF5ZBsWq2BMmgj2CZ lTv0uhhtQ0//aZ5X387mJBFcBVuApv54vjsJlV0w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757656AbgJ0OTx (ORCPT ); Tue, 27 Oct 2020 10:19:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:40730 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S460358AbgJ0ORi (ORCPT ); Tue, 27 Oct 2020 10:17:38 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 CF5D0206F7; Tue, 27 Oct 2020 14:17:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603808258; bh=m5PM8Aalp8ez1lWfySaxFWEGz5AJ2IA8HDibuZMhuOg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=w+9pnE+U57EBoP9v/7yMw9fJErYrwujxZ7ol6Cfl6CwseoPgzUhmaR+15dMDcsmSL d/RihusAVzYIkLJ5b4orbmH8pgRGLeGdnsXk9fYM5EAcaJVgHBC9qEmaSbpVk8qgru 3lw27I4cYwb9WCtWxgx9+B1BgOAUfPNRl10ZOEVY= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Heiner Kallweit , Jakub Kicinski Subject: [PATCH 4.19 024/264] r8169: fix operation under forced interrupt threading Date: Tue, 27 Oct 2020 14:51:22 +0100 Message-Id: <20201027135431.790182685@linuxfoundation.org> X-Mailer: git-send-email 2.29.1 In-Reply-To: <20201027135430.632029009@linuxfoundation.org> References: <20201027135430.632029009@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Heiner Kallweit [ Upstream commit 424a646e072a887aa87283b53aa6f8b19c2a7bef ] For several network drivers it was reported that using __napi_schedule_irqoff() is unsafe with forced threading. One way to fix this is switching back to __napi_schedule, but then we lose the benefit of the irqoff version in general. As stated by Eric it doesn't make sense to make the minimal hard irq handlers in drivers using NAPI a thread. Therefore ensure that the hard irq handler is never thread-ified. Fixes: 9a899a35b0d6 ("r8169: switch to napi_schedule_irqoff") Link: https://lkml.org/lkml/2020/10/18/19 Signed-off-by: Heiner Kallweit Link: https://lore.kernel.org/r/4d3ef84a-c812-5072-918a-22a6f6468310@gmail.com Signed-off-by: Jakub Kicinski Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/realtek/r8169.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/drivers/net/ethernet/realtek/r8169.c +++ b/drivers/net/ethernet/realtek/r8169.c @@ -6830,7 +6830,7 @@ static int rtl8169_close(struct net_devi phy_disconnect(dev->phydev); - pci_free_irq(pdev, 0, tp); + free_irq(pci_irq_vector(pdev, 0), tp); dma_free_coherent(&pdev->dev, R8169_RX_RING_BYTES, tp->RxDescArray, tp->RxPhyAddr); @@ -6885,8 +6885,8 @@ static int rtl_open(struct net_device *d rtl_request_firmware(tp); - retval = pci_request_irq(pdev, 0, rtl8169_interrupt, NULL, tp, - dev->name); + retval = request_irq(pci_irq_vector(pdev, 0), rtl8169_interrupt, + IRQF_NO_THREAD | IRQF_SHARED, dev->name, tp); if (retval < 0) goto err_release_fw_2; @@ -6919,7 +6919,7 @@ out: return retval; err_free_irq: - pci_free_irq(pdev, 0, tp); + free_irq(pci_irq_vector(pdev, 0), tp); err_release_fw_2: rtl_release_firmware(tp); rtl8169_rx_clear(tp);