linux-kernel - [PATCH v3 30/32] PCI/tsi721: use PCIe capabilities access functions to simplify implementation

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Message-Id: <1343836477-7287-31-git-send-email-jiang.liu@huawei.com>
Date:	Wed,  1 Aug 2012 23:54:35 +0800
From:	Jiang Liu <liuj97@...il.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Don Dutile <ddutile@...hat.com>,
	Matt Porter <mporter@...nel.crashing.org>,
	Alexandre Bounine <alexandre.bounine@....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>,
	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	Jiang Liu <liuj97@...il.com>
Subject: [PATCH v3 30/32] PCI/tsi721: use PCIe capabilities access functions to simplify implementation

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

Use PCIe capabilities access functions to simplify tsi721 driver's
implementation.

Signed-off-by: Jiang Liu <liuj97@...il.com>
---
 drivers/rapidio/devices/tsi721.c |   19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/drivers/rapidio/devices/tsi721.c b/drivers/rapidio/devices/tsi721.c
index 722246c..5970c43 100644
--- a/drivers/rapidio/devices/tsi721.c
+++ b/drivers/rapidio/devices/tsi721.c
@@ -2212,9 +2212,8 @@ static int __devinit tsi721_probe(struct pci_dev *pdev,
 				  const struct pci_device_id *id)
 {
 	struct tsi721_device *priv;
-	int i, cap;
+	int i;
 	int err;
-	u32 regval;
 
 	priv = kzalloc(sizeof(struct tsi721_device), GFP_KERNEL);
 	if (priv == NULL) {
@@ -2320,20 +2319,16 @@ static int __devinit tsi721_probe(struct pci_dev *pdev,
 			dev_info(&pdev->dev, "Unable to set consistent DMA mask\n");
 	}
 
-	cap = pci_pcie_cap(pdev);
-	BUG_ON(cap == 0);
+	BUG_ON(!pci_is_pcie(pdev));
 
 	/* Clear "no snoop" and "relaxed ordering" bits, use default MRRS. */
-	pci_read_config_dword(pdev, cap + PCI_EXP_DEVCTL, &regval);
-	regval &= ~(PCI_EXP_DEVCTL_READRQ | PCI_EXP_DEVCTL_RELAX_EN |
-		    PCI_EXP_DEVCTL_NOSNOOP_EN);
-	regval |= 0x2 << MAX_READ_REQUEST_SZ_SHIFT;
-	pci_write_config_dword(pdev, cap + PCI_EXP_DEVCTL, regval);
+	pci_pcie_capability_change_dword(pdev, PCI_EXP_DEVCTL,
+		0x2 << MAX_READ_REQUEST_SZ_SHIFT,
+		PCI_EXP_DEVCTL_READRQ | PCI_EXP_DEVCTL_RELAX_EN |
+		PCI_EXP_DEVCTL_NOSNOOP_EN);
 
 	/* Adjust PCIe completion timeout. */
-	pci_read_config_dword(pdev, cap + PCI_EXP_DEVCTL2, &regval);
-	regval &= ~(0x0f);
-	pci_write_config_dword(pdev, cap + PCI_EXP_DEVCTL2, regval | 0x2);
+	pci_pcie_capability_change_dword(pdev, PCI_EXP_DEVCTL2, 0x2, 0xf);
 
 	/*
 	 * FIXUP: correct offsets of MSI-X tables in the MSI-X Capability Block
-- 
1.7.9.5

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