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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,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 B95B9C3B1A1 for ; Fri, 14 Feb 2020 17:22:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8450F20637 for ; Fri, 14 Feb 2020 17:22:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581700922; bh=ONxDg8UBSF0eZbElzoFn8SmqwlRSm4oFuWTBHP90bZ4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=AC74Sc4Y8o966R1AVzmEkB/Ec8245Mo8+KgdcZnh3TQbz+NfvSGGHy9dMc2nAiFso eKcYqzQ+moIrSwHK6xJx8G1ud+lfXHM8sEJmVSwuWbliVCXE/kT0p8KBC9W1TRQ++v eAplRmCyW4k9TgVPL5YhihHGe2E+XxOJ5qlPdH4Q= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391535AbgBNRWB (ORCPT ); Fri, 14 Feb 2020 12:22:01 -0500 Received: from mail.kernel.org ([198.145.29.99]:35568 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391423AbgBNQKL (ORCPT ); Fri, 14 Feb 2020 11:10:11 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3ECA02468E; Fri, 14 Feb 2020 16:10:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581696611; bh=ONxDg8UBSF0eZbElzoFn8SmqwlRSm4oFuWTBHP90bZ4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=L7LhNgIGUJaCufgKXjtk/q4x7Dn2JMm77Bx9bBkD9IWXV6I8X24sTELRau92EQ4c0 51+KDzeH+uQxEGesWFRUjz6Nm3FADv75xtwULQvuGn+k2ZoEq/bGVW12pUGAmxbA+b /23X90yo1v9+HgLL5ob7s+yC3HVIzs79adGqouA8= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dongdong Liu , Bjorn Helgaas , Sasha Levin , linuxppc-dev@lists.ozlabs.org, linux-pci@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 394/459] PCI/AER: Initialize aer_fifo Date: Fri, 14 Feb 2020 11:00:44 -0500 Message-Id: <20200214160149.11681-394-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214160149.11681-1-sashal@kernel.org> References: <20200214160149.11681-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Dongdong Liu [ Upstream commit d95f20c4f07020ebc605f3b46af4b6db9eb5fc99 ] Previously we did not call INIT_KFIFO() for aer_fifo. This leads to kfifo_put() sometimes returning 0 (queue full) when in fact it is not. It is easy to reproduce the problem by using aer-inject: $ aer-inject -s :82:00.0 multiple-corr-nonfatal The content of the multiple-corr-nonfatal file is as below: AER COR RCVR HL 0 1 2 3 AER UNCOR POISON_TLP HL 4 5 6 7 Fixes: 27c1ce8bbed7 ("PCI/AER: Use kfifo for tracking events instead of reimplementing it") Link: https://lore.kernel.org/r/1579767991-103898-1-git-send-email-liudongdong3@huawei.com Signed-off-by: Dongdong Liu Signed-off-by: Bjorn Helgaas Signed-off-by: Sasha Levin --- drivers/pci/pcie/aer.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index b45bc47d04fe4..271aecfbc3bf3 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -1387,6 +1387,7 @@ static int aer_probe(struct pcie_device *dev) return -ENOMEM; rpc->rpd = port; + INIT_KFIFO(rpc->aer_fifo); set_service_data(dev, rpc); status = devm_request_threaded_irq(device, dev->irq, aer_irq, aer_isr, -- 2.20.1