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: <51CAB867.9000001@huawei.com>
Date:	Wed, 26 Jun 2013 17:46:15 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	Jack Wang <xjtuwjp@...il.com>
CC:	"James E.J. Bottomley" <JBottomley@...allels.com>,
	<linux-kernel@...r.kernel.org>, Hanjun Guo <guohanjun@...wei.com>,
	<jiang.liu@...wei.com>, <lindar_liu@...sh.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)

On 2013/6/26 17:33, Jack Wang wrote:
> On 06/18/2013 10:23 AM, Yijing Wang wrote:
>> 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.
>>
> I think Lindar already replied to you, and tested it on hardware.

I didn't receive the reply, I will check my email client, maybe I lose some emails.
Jack, Lindar thank you very much.

> 
> So you can add her:
> Acked-by or Tested-by

ok, I will add them.


> 
> 
> Regards,
> Jack
>> 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);
>>
> 
> 
> .
> 


-- 
Thanks!
Yijing

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