linux-kernel - [PATCH 8/9] scsi/pm8001: use pdev->pm_cap instead of pci_find_capability(..,PCI_CAP_ID

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Date:	Wed, 26 Jun 2013 09:13:30 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	<linux-kernel@...r.kernel.org>,
	Yijing Wang <wangyijing@...wei.com>, <xjtuwjp@...il.com>,
	<lindar_liu@...sh.com>,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	<linux-scsi@...r.kernel.org>
Subject: [PATCH 8/9] scsi/pm8001: use pdev->pm_cap instead of pci_find_capability(..,PCI_CAP_ID_PM)

Pci core has been saved pm cap register offset by pdev->pm_cap in pci_pm_init()
in init path. So we can use pdev->pm_cap instead of using
pci_find_capability(pdev, PCI_CAP_ID_PM) for better performance and simplified code.

Signed-off-by: Yijing Wang <wangyijing@...wei.com>
Cc: xjtuwjp@...il.com
Cc: lindar_liu@...sh.com
Cc: "James E.J. Bottomley" <JBottomley@...allels.com>
Cc: linux-scsi@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
---
 drivers/scsi/pm8001/pm8001_init.c |    7 +++----
 1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/pm8001/pm8001_init.c b/drivers/scsi/pm8001/pm8001_init.c
index e4b9bc7..3861aa1 100644
--- a/drivers/scsi/pm8001/pm8001_init.c
+++ b/drivers/scsi/pm8001/pm8001_init.c
@@ -912,14 +912,13 @@ static int pm8001_pci_suspend(struct pci_dev *pdev, pm_message_t state)
 {
 	struct sas_ha_struct *sha = pci_get_drvdata(pdev);
 	struct pm8001_hba_info *pm8001_ha;
-	int i , pos;
+	int i;
 	u32 device_state;
 	pm8001_ha = sha->lldd_ha;
 	flush_workqueue(pm8001_wq);
 	scsi_block_requests(pm8001_ha->shost);
-	pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
-	if (pos == 0) {
-		printk(KERN_ERR " PCI PM not supported\n");
+	if (!pdev->pm_cap) {
+		dev_err(&pdev->dev, " PCI PM not supported\n");
 		return -ENODEV;
 	}
 	PM8001_CHIP_DISP->interrupt_disable(pm8001_ha, 0xFF);
-- 
1.7.1


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