From nobody Mon Feb 9 16:01:46 2026 Received: from out30-111.freemail.mail.aliyun.com (out30-111.freemail.mail.aliyun.com [115.124.30.111]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 860812BEFF6; Sat, 24 Jan 2026 07:46:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.111 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769240807; cv=none; b=FgeHfNAUN+YunduunwAnWkssViq0rYyDY5l9DImasB1Tf4tPhlHYvVIdeE9hEOJMDU3oS4ZeRAwsMkuLWfsqPuSzkT4xzSNZFmoOSybF0OsrkTl29TL/EkYrQv7oqGyvxWNHy5I7Y6kelC+GHUlVXNyk5yuH+Jkvp3TrKhuqUXg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769240807; c=relaxed/simple; bh=DVWMHTNJQE5K0BQW2nIXCCu88zLHRBYPXSf6sOrFFy4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ot5mYLmRLlsWtAzRRbjGlRLY1AGfDeYcxz9Naub5NilxuG9n+vXSagbHiVY8EOKVx0UdibAtR6teD7BYwdL0ZlSbpzNb4FYAwL5OBwXPReE8i6o4H7f2xk5FDlEAwqZupC9pbxG3D0ZsHBmzUefUW4zAEl8v94M32E2TsbxkYJc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=t7EV4mG+; arc=none smtp.client-ip=115.124.30.111 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="t7EV4mG+" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1769240789; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=sBSDEixm4+8FCCTYQu1UeCBdF+LTdyt08Svk7uwlzxo=; b=t7EV4mG+yoarR/t0bXg0k/9wDAMAJfjbQMZjC8ekDzUVmXakmw0E9Q+NPPUZkXdCETEcQzmdaJW8PjKVDLriz1Eeyeh8sEzp7U7mFAfwuPfs3dm+5nv0u4qanZuszEdNuBoZvsDXMTXkcWv8rKc9rVHeNmbpUgQhSKYLIgIhlkA= Received: from localhost.localdomain(mailfrom:xueshuai@linux.alibaba.com fp:SMTPD_---0WxiIIC1_1769240788 cluster:ay36) by smtp.aliyun-inc.com; Sat, 24 Jan 2026 15:46:28 +0800 From: Shuai Xue To: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, bhelgaas@google.com, kbusch@kernel.org, sathyanarayanan.kuppuswamy@linux.intel.com Cc: mahesh@linux.ibm.com, oohall@gmail.com, xueshuai@linux.alibaba.com, Jonathan.Cameron@huawei.com, terry.bowman@amd.com, tianruidong@linux.alibaba.com, lukas@wunner.de Subject: [PATCH v7 5/5] PCI/AER: Only clear error bits in pcie_clear_device_status() Date: Sat, 24 Jan 2026 15:45:57 +0800 Message-Id: <20260124074557.73961-6-xueshuai@linux.alibaba.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) In-Reply-To: <20260124074557.73961-1-xueshuai@linux.alibaba.com> References: <20260124074557.73961-1-xueshuai@linux.alibaba.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Currently, pcie_clear_device_status() clears the entire PCIe Device Status register (PCI_EXP_DEVSTA), which includes both error status bits and other status bits such as AUX Power Detected (AUXPD) and Transactions Pending (TRPND). Clearing non-error status bits can interfere with other drivers or subsystems that may rely on these bits. To fix it, only clear the error bits (0xf) while preserving other status bits. Fixes: ec752f5d54d7 ("PCI/AER: Clear device status bits during ERR_FATAL an= d ERR_NONFATAL") Cc: stable@vger.kernel.org Suggested-by: Lukas Wunner Signed-off-by: Shuai Xue Reviewed-by: Kuppuswamy Sathyanarayanan --- drivers/pci/pci.c | 2 +- include/uapi/linux/pci_regs.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 13dbb405dc31..0b947f90c333 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -2246,7 +2246,7 @@ void pcie_clear_device_status(struct pci_dev *dev) u16 sta; =20 pcie_capability_read_word(dev, PCI_EXP_DEVSTA, &sta); - pcie_capability_write_word(dev, PCI_EXP_DEVSTA, sta); + pcie_capability_write_word(dev, PCI_EXP_DEVSTA, sta & PCI_EXP_DEVSTA_ERR); } #endif =20 diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h index 3add74ae2594..f4b68203bc4e 100644 --- a/include/uapi/linux/pci_regs.h +++ b/include/uapi/linux/pci_regs.h @@ -534,6 +534,7 @@ #define PCI_EXP_DEVSTA_NFED 0x0002 /* Non-Fatal Error Detected */ #define PCI_EXP_DEVSTA_FED 0x0004 /* Fatal Error Detected */ #define PCI_EXP_DEVSTA_URD 0x0008 /* Unsupported Request Detected */ +#define PCI_EXP_DEVSTA_ERR 0xf /* Error bits */ #define PCI_EXP_DEVSTA_AUXPD 0x0010 /* AUX Power Detected */ #define PCI_EXP_DEVSTA_TRPND 0x0020 /* Transactions Pending */ #define PCI_CAP_EXP_RC_ENDPOINT_SIZEOF_V1 12 /* v1 endpoints without link = end here */ --=20 2.39.3