linux-kernel - [PATCH 5/6] staging/et131x: Use cached pci_dev->pcie_mpss and pcie_set

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Date:	Mon, 9 Sep 2013 21:13:07 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Chris Metcalf <cmetcalf@...era.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	David Airlie <airlied@...ux.ie>,
	Mike Marciniszyn <infinipath@...el.com>,
	Roland Dreier <roland@...nel.org>,
	Roland Dreier <roland@...estorage.com>
CC:	<linux-kernel@...r.kernel.org>, Mark Einon <mark.einon@...il.com>,
	Sean Hefty <sean.hefty@...el.com>,
	Hal Rosenstock <hal.rosenstock@...il.com>,
	<linux-rdma@...r.kernel.org>, <linux-pci@...r.kernel.org>,
	Yijing Wang <wangyijing@...wei.com>,
	Hanjun Guo <guohanjun@...wei.com>
Subject: [PATCH 5/6] staging/et131x: Use cached pci_dev->pcie_mpss and pcie_set_readrq() to simplif code

The PCI core caches the "PCI-E Max Payload Size Supported" in
pci_dev->pcie_mpss, so use that instead of pcie_capability_read_dword().
Also use pcie_set_readrq() instead of pcie_capability_clear_and_set_word()
to simplify code.

Signed-off-by: Yijing Wang <wangyijing@...wei.com>
---
 drivers/staging/et131x/et131x.c |   14 +++-----------
 1 files changed, 3 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/et131x/et131x.c b/drivers/staging/et131x/et131x.c
index f73e58f..876881d 100644
--- a/drivers/staging/et131x/et131x.c
+++ b/drivers/staging/et131x/et131x.c
@@ -3605,17 +3605,10 @@ static int et131x_pci_init(struct et131x_adapter *adapter,
 		goto err_out;
 	}
 
-	/* Let's set up the PORT LOGIC Register.  First we need to know what
-	 * the max_payload_size is
-	 */
-	if (pcie_capability_read_word(pdev, PCI_EXP_DEVCAP, &max_payload)) {
-		dev_err(&pdev->dev,
-		    "Could not read PCI config space for Max Payload Size\n");
-		goto err_out;
-	}
+	/* Let's set up the PORT LOGIC Register. */
 
 	/* Program the Ack/Nak latency and replay timers */
-	max_payload &= 0x07;
+	max_payload = pdev->pcie_mpss;
 
 	if (max_payload < 2) {
 		static const u16 acknak[2] = { 0x76, 0xD0 };
@@ -3645,8 +3638,7 @@ static int et131x_pci_init(struct et131x_adapter *adapter,
 	}
 
 	/* Change the max read size to 2k */
-	if (pcie_capability_clear_and_set_word(pdev, PCI_EXP_DEVCTL,
-				PCI_EXP_DEVCTL_READRQ, 0x4 << 12)) {
+	if (pcie_set_readrq(pdev, 2048)) {
 		dev_err(&pdev->dev,
 			"Couldn't change PCI config space for Max read size\n");
 		goto err_out;
-- 
1.7.1


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