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

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Message-ID: <001401ce6c05$bd0ff920$372feb60$@com>
Date:	Tue, 18 Jun 2013 17:25:09 +0800
From:	"lindar_liu" <lindar_liu@...sh.com>
To:	"'Yijing Wang'" <wangyijing@...wei.com>,
	"'James E.J. Bottomley'" <JBottomley@...allels.com>
Cc:	<linux-kernel@...r.kernel.org>,
	"'Hanjun Guo'" <guohanjun@...wei.com>, <jiang.liu@...wei.com>,
	<xjtuwjp@...il.com>, <linux-scsi@...r.kernel.org>
Subject: RE: [PATCH 8/9] scsi/pm8001: use pdev->pm_cap instead of pci_find_capability(..,PCI_CAP_ID_PM)

It works, thanks.

Lindar.

-----Original Message-----
From: Yijing Wang [mailto:wangyijing@...wei.com] 
Sent: Tuesday, June 18, 2013 4:24 PM
To: James E.J. Bottomley
Cc: linux-kernel@...r.kernel.org; Hanjun Guo; jiang.liu@...wei.com; Yijing
Wang; xjtuwjp@...il.com; lindar_liu@...sh.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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