From patchwork Sun Dec 17 11:29:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ethan Zhao X-Patchwork-Id: 13495843 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.93]) (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 AA4963219A; Sun, 17 Dec 2023 11:29:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="anLJm4U4" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1702812556; x=1734348556; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Zmr4iOaKRcC/J+uN3VtrQ8ZKGY/uLhanvtbfyrOyoCQ=; b=anLJm4U4kOHLaKw6MPwHtQSCDwSaISh2sR0lamyalANdDua9CV9qKf+2 1R7O+uLl4gi/Pi8OK6fL05eFYw3xoV2PEd2tZdPREpyNkzlbyAWvjbC+o T8WQNaApQFLK9avA4nLz+7meAC53c/dEmZ7S5JJn0V9dyD775zw9FhtBS Vb3858v42ANLtl0idpJ4S/aKYlin4Qq9or93ODUzkuGNEZ/CL3ft+WeUX xIbqGtg/gje75kRdln8I1SIkEUas4g9N+t7J3jTQmtcpg7oyWdmmsHCnn sMPCFoCYVvVNyEjxjnZvCrMPsFttkvzqZ8P80qNtKxmZ+oI/6vowDUnHO A==; X-IronPort-AV: E=McAfee;i="6600,9927,10926"; a="392582754" X-IronPort-AV: E=Sophos;i="6.04,283,1695711600"; d="scan'208";a="392582754" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Dec 2023 03:29:16 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10926"; a="893470102" X-IronPort-AV: E=Sophos;i="6.04,283,1695711600"; d="scan'208";a="893470102" Received: from ply01-vm-store.bj.intel.com ([10.238.153.201]) by fmsmga002.fm.intel.com with ESMTP; 17 Dec 2023 03:29:13 -0800 From: Ethan Zhao To: bhelgaas@google.com, baolu.lu@linux.intel.com, dwmw2@infradead.org, will@kernel.org, robin.murphy@arm.com, lukas@wunner.de Cc: linux-pci@vger.kernel.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, Ethan Zhao , Haorong Ye Subject: [PATCH v2 1/2] PCI: make pci_dev_is_disconnected() helper public for Date: Sun, 17 Dec 2023 06:29:03 -0500 Message-Id: <20231217112904.3835559-2-haifeng.zhao@linux.intel.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20231217112904.3835559-1-haifeng.zhao@linux.intel.com> References: <20231217112904.3835559-1-haifeng.zhao@linux.intel.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Make pci_dev_is_disconnected() public so that it can be called from Intel vt-d driver to quick fix/woraround the SURPPRISE_REMOVAL unplug hang issue for those ATS capable devices on PCIe switch downstream ports. Tested-by: Haorong Ye Signed-off-by: Ethan Zhao --- drivers/pci/pci.h | 5 ----- include/linux/pci.h | 5 +++++ 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 5ecbcf041179..75fa2084492f 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -366,11 +366,6 @@ static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused) return 0; } -static inline bool pci_dev_is_disconnected(const struct pci_dev *dev) -{ - return dev->error_state == pci_channel_io_perm_failure; -} - /* pci_dev priv_flags */ #define PCI_DEV_ADDED 0 #define PCI_DPC_RECOVERED 1 diff --git a/include/linux/pci.h b/include/linux/pci.h index 60ca768bc867..869f2ec97a84 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -2503,6 +2503,11 @@ static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev) return NULL; } +static inline bool pci_dev_is_disconnected(const struct pci_dev *dev) +{ + return dev->error_state == pci_channel_io_perm_failure; +} + void pci_request_acs(void); bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags); bool pci_acs_path_enabled(struct pci_dev *start,