linux-kernel - Re: [PATCH 1/1] libata: Blackfin Pata Driver: Add proper PM operation into ATAPI driver.

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Message-ID: <386072610808280120u7fb5073an52c10bc98b8448d8@mail.gmail.com>
Date:	Thu, 28 Aug 2008 16:20:49 +0800
From:	"Bryan Wu" <cooloney@...nel.org>
To:	"Andrew Morton" <akpm@...ux-foundation.org>
Cc:	jgarzik@...ox.com, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	"Sonic Zhang" <sonic.zhang@...log.com>
Subject: Re: [PATCH 1/1] libata: Blackfin Pata Driver: Add proper PM operation into ATAPI driver.

On Thu, Aug 28, 2008 at 11:51 AM, Andrew Morton
<akpm@...ux-foundation.org> wrote:
> On Wed, 27 Aug 2008 11:51:18 +0800 Bryan Wu <cooloney@...nel.org> wrote:
>
>> From: Sonic Zhang <sonic.zhang@...log.com>
>>
>> Signed-off-by: Sonic Zhang <sonic.zhang@...log.com>
>> Signed-off-by: Bryan Wu <cooloney@...nel.org>
>> ---
>>  drivers/ata/pata_bf54x.c |   29 ++++++++++++++++++++++++-----
>>  1 files changed, 24 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/ata/pata_bf54x.c b/drivers/ata/pata_bf54x.c
>> index d393290..60f4872 100644
>> --- a/drivers/ata/pata_bf54x.c
>> +++ b/drivers/ata/pata_bf54x.c
>> @@ -1632,6 +1632,8 @@ static int __devinit bfin_atapi_probe(struct platform_device *pdev)
>>               return -ENODEV;
>>       }
>>
>> +     dev_set_drvdata(&pdev->dev, host);
>> +
>>       return 0;
>>  }
>>
>> @@ -1648,6 +1650,7 @@ static int __devexit bfin_atapi_remove(struct platform_device *pdev)
>>       struct ata_host *host = dev_get_drvdata(dev);
>>
>>       ata_host_detach(host);
>> +     dev_set_drvdata(&pdev->dev, NULL);
>>
>>       peripheral_free_list(atapi_io_port);
>>
>> @@ -1657,11 +1660,27 @@ static int __devexit bfin_atapi_remove(struct platform_device *pdev)
>>  #ifdef CONFIG_PM
>>  int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state)
>>  {
>> -     return 0;
>> +     struct ata_host *host = dev_get_drvdata(&pdev->dev);
>> +     if (host)
>> +             return ata_host_suspend(host, state);
>> +     else
>> +             return 0;
>>  }
>>
>>  int bfin_atapi_resume(struct platform_device *pdev)
>>  {
>> +     struct ata_host *host = dev_get_drvdata(&pdev->dev);
>> +     int ret;
>> +
>> +     if (host) {
>> +             ret = bfin_reset_controller(host);
>> +             if (ret) {
>> +                     printk(KERN_ERR DRV_NAME ": Error during HW init\n");
>> +                     return ret;
>> +             }
>> +             ata_host_resume(host);
>> +     }
>> +
>>       return 0;
>>  }
>>  #endif
>> @@ -1669,13 +1688,13 @@ int bfin_atapi_resume(struct platform_device *pdev)
>>  static struct platform_driver bfin_atapi_driver = {
>>       .probe                  = bfin_atapi_probe,
>>       .remove                 = __devexit_p(bfin_atapi_remove),
>> +#ifdef CONFIG_PM
>> +     .suspend                = bfin_atapi_suspend,
>> +     .resume                 = bfin_atapi_resume,
>> +#endif
>>       .driver = {
>>               .name           = DRV_NAME,
>>               .owner          = THIS_MODULE,
>> -#ifdef CONFIG_PM
>> -             .suspend        = bfin_atapi_suspend,
>> -             .resume         = bfin_atapi_resume,
>> -#endif
>>       },
>>  };
>
> I think we can make these fixes while we're there?
>
> From: Andrew Morton <akpm@...ux-foundation.org>
>
> - remove the ifdefs using the usual pattern
>
> - make things static
>

Right, I agree here.

-Bryan

> Cc: Bryan Wu <cooloney@...nel.org>
> Cc: Jeff Garzik <jeff@...zik.org>
> Cc: Sonic Zhang <sonic.zhang@...log.com>
> Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
> ---
>
>  drivers/ata/pata_bf54x.c |    9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff -puN drivers/ata/pata_bf54x.c~libata-blackfin-pata-driver-add-proper-pm-operation-into-atapi-driver-fix drivers/ata/pata_bf54x.c
> --- a/drivers/ata/pata_bf54x.c~libata-blackfin-pata-driver-add-proper-pm-operation-into-atapi-driver-fix
> +++ a/drivers/ata/pata_bf54x.c
> @@ -1658,7 +1658,7 @@ static int __devexit bfin_atapi_remove(s
>  }
>
>  #ifdef CONFIG_PM
> -int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state)
> +static int bfin_atapi_suspend(struct platform_device *pdev, pm_message_t state)
>  {
>        struct ata_host *host = dev_get_drvdata(&pdev->dev);
>        if (host)
> @@ -1667,7 +1667,7 @@ int bfin_atapi_suspend(struct platform_d
>                return 0;
>  }
>
> -int bfin_atapi_resume(struct platform_device *pdev)
> +static int bfin_atapi_resume(struct platform_device *pdev)
>  {
>        struct ata_host *host = dev_get_drvdata(&pdev->dev);
>        int ret;
> @@ -1683,15 +1683,16 @@ int bfin_atapi_resume(struct platform_de
>
>        return 0;
>  }
> +#else
> +#define bfin_atapi_suspend NULL
> +#define bfin_atapi_resume NULL
>  #endif
>
>  static struct platform_driver bfin_atapi_driver = {
>        .probe                  = bfin_atapi_probe,
>        .remove                 = __devexit_p(bfin_atapi_remove),
> -#ifdef CONFIG_PM
>        .suspend                = bfin_atapi_suspend,
>        .resume                 = bfin_atapi_resume,
> -#endif
>        .driver = {
>                .name           = DRV_NAME,
>                .owner          = THIS_MODULE,
> _
>
>
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