linux-kernel - [RFC PATCH 07/14] hotplug/PCI: use PCIe cap access functions to simplify implementation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1341935655-5381-8-git-send-email-jiang.liu@huawei.com>
Date:	Tue, 10 Jul 2012 23:54:08 +0800
From:	Jiang Liu <liuj97@...il.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Don Dutile <ddutile@...hat.com>
Cc:	Jiang Liu <jiang.liu@...wei.com>, Yinghai Lu <yinghai@...nel.org>,
	Taku Izumi <izumi.taku@...fujitsu.com>,
	"Rafael J . Wysocki" <rjw@...k.pl>,
	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	Yijing Wang <wangyijing@...wei.com>,
	Keping Chen <chenkeping@...wei.com>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	Jiang Liu <liuj97@...il.com>
Subject: [RFC PATCH 07/14] hotplug/PCI: use PCIe cap access functions to simplify implementation

From: Jiang Liu <jiang.liu@...wei.com>

Use PCIe cap access functions to simplify pcihp_slot.c

Signed-off-by: Jiang Liu <liuj97@...il.com>
---
 drivers/pci/hotplug/pcihp_slot.c |   17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/pci/hotplug/pcihp_slot.c b/drivers/pci/hotplug/pcihp_slot.c
index 8c05a18..08ca019 100644
--- a/drivers/pci/hotplug/pcihp_slot.c
+++ b/drivers/pci/hotplug/pcihp_slot.c
@@ -103,8 +103,7 @@ static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
 		return;
 
 	/* Find PCI Express capability */
-	pos = pci_pcie_cap(dev);
-	if (!pos)
+	if (!pci_is_pcie(dev))
 		return;
 
 	if (hpp->revision > 1) {
@@ -114,16 +113,18 @@ static void program_hpp_type2(struct pci_dev *dev, struct hpp_type2 *hpp)
 	}
 
 	/* Initialize Device Control Register */
-	pci_read_config_word(dev, pos + PCI_EXP_DEVCTL, &reg16);
+	if (pci_pcie_cap_read_word(dev, PCI_EXP_DEVCTL, &reg16))
+		return;
 	reg16 = (reg16 & hpp->pci_exp_devctl_and) | hpp->pci_exp_devctl_or;
-	pci_write_config_word(dev, pos + PCI_EXP_DEVCTL, reg16);
+	pci_pcie_cap_write_word(dev, PCI_EXP_DEVCTL, reg16);
 
 	/* Initialize Link Control Register */
 	if (dev->subordinate) {
-		pci_read_config_word(dev, pos + PCI_EXP_LNKCTL, &reg16);
-		reg16 = (reg16 & hpp->pci_exp_lnkctl_and)
-			| hpp->pci_exp_lnkctl_or;
-		pci_write_config_word(dev, pos + PCI_EXP_LNKCTL, reg16);
+		if (pci_pcie_cap_read_word(dev, PCI_EXP_LNKCTL, &reg16)) {
+			reg16 = (reg16 & hpp->pci_exp_lnkctl_and)
+				| hpp->pci_exp_lnkctl_or;
+			pci_pcie_cap_write_word(dev, PCI_EXP_LNKCTL, reg16);
+		}
 	}
 
 	/* Find Advanced Error Reporting Enhanced Capability */
-- 
1.7.9.5

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/