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

From: lindar_liu
Date: Tue Jun 18 2013 - 05:39:51 EST

It works, thanks.


-----Original Message-----
From: Yijing Wang [mailto:wangyijing@xxxxxxxxxx]
Sent: Tuesday, June 18, 2013 4:24 PM
To: James E.J. Bottomley
Cc: linux-kernel@xxxxxxxxxxxxxxx; Hanjun Guo; jiang.liu@xxxxxxxxxx; Yijing
Wang; xjtuwjp@xxxxxxxxx; lindar_liu@xxxxxxxxx; linux-scsi@xxxxxxxxxxxxxxx
Subject: [PATCH 8/9] scsi/pm8001: use pdev->pm_cap instead of

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@xxxxxxxxxx>
Cc: xjtuwjp@xxxxxxxxx
Cc: lindar_liu@xxxxxxxxx
Cc: "James E.J. Bottomley" <JBottomley@xxxxxxxxxxxxx>
Cc: linux-scsi@xxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
drivers/scsi/pm8001/pm8001_init.c | 7 +++----
1 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/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;
- 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);

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