On Monday, July 11, 2011, Chuanxiao Dong wrote:
> MMC bus suspend/resume was using legacy method. In system entering
> S3 patch, the suspend/resume function cannot be called since MMC
> bus also implemented the new suspend/resume method (dev_pm_ops struct).
> So if dev_pm_ops is defined but .suspend/.resume callbacks not implemented,
> mmc_queue will not be suspended/resumed.
>
> This patch will remove the legacy suspend/resume method and change to
> use the new method totally.
>
> Signed-off-by: Chuanxiao Dong <chuanxiao.dong@xxxxxxxxx>
> ---
> drivers/mmc/card/block.c | 2 +-
> drivers/mmc/core/bus.c | 24 +++++++++++-------------
> include/linux/mmc/card.h | 2 +-
> 3 files changed, 13 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
> index 38d0149..224f1bb 100644
> --- a/drivers/mmc/card/block.c
> +++ b/drivers/mmc/card/block.c
> @@ -1549,7 +1549,7 @@ static void mmc_blk_remove(struct mmc_card *card)
> }
>
> #ifdef CONFIG_PM
> -static int mmc_blk_suspend(struct mmc_card *card, pm_message_t state)
> +static int mmc_blk_suspend(struct mmc_card *card)
> {
> struct mmc_blk_data *part_md;
> struct mmc_blk_data *md = mmc_get_drvdata(card);
> diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
> index 393d817..03be6d0 100644
> --- a/drivers/mmc/core/bus.c
> +++ b/drivers/mmc/core/bus.c
> @@ -120,14 +120,14 @@ static int mmc_bus_remove(struct device *dev)
> return 0;
> }
>
> -static int mmc_bus_suspend(struct device *dev, pm_message_t state)
> +static int mmc_bus_suspend(struct device *dev)
> {
> struct mmc_driver *drv = to_mmc_driver(dev->driver);
> struct mmc_card *card = mmc_dev_to_card(dev);
> int ret = 0;
>
> if (dev->driver && drv->suspend)
> - ret = drv->suspend(card, state);
> + ret = drv->suspend(card);
> return ret;
> }
>
> @@ -163,20 +163,20 @@ static int mmc_runtime_idle(struct device *dev)
> return pm_runtime_suspend(dev);
> }
>
> +#else /* !CONFIG_PM_RUNTIME */
> +#define mmc_runtime_suspend NULL
> +#define mmc_runtime_resume NULL
> +#define mmc_runtime_idle NULL
> +#endif /* !CONFIG_PM_RUNTIME */
> +
> static const struct dev_pm_ops mmc_bus_pm_ops = {
> .runtime_suspend = mmc_runtime_suspend,
> .runtime_resume = mmc_runtime_resume,
> .runtime_idle = mmc_runtime_idle,
> + .suspend = mmc_bus_suspend,
> + .resume = mmc_bus_resume,
> };
Please define hibernate callbacks too, for example by using the
SIMPLE_DEV_PM_OPS() convenience macro, defined in include/linux/pm.h.
Thanks,
Rafael
> -#define MMC_PM_OPS_PTR (&mmc_bus_pm_ops)
> -
> -#else /* !CONFIG_PM_RUNTIME */
> -
> -#define MMC_PM_OPS_PTR NULL
> -
> -#endif /* !CONFIG_PM_RUNTIME */
> -
> static struct bus_type mmc_bus_type = {
> .name = "mmc",
> .dev_attrs = mmc_dev_attrs,
> @@ -184,9 +184,7 @@ static struct bus_type mmc_bus_type = {
> .uevent = mmc_bus_uevent,
> .probe = mmc_bus_probe,
> .remove = mmc_bus_remove,
> - .suspend = mmc_bus_suspend,
> - .resume = mmc_bus_resume,
> - .pm = MMC_PM_OPS_PTR,
> + .pm = &mmc_bus_pm_ops,
> };
>
> int mmc_register_bus(void)
> diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
> index b460fc2..978f395 100644
> --- a/include/linux/mmc/card.h
> +++ b/include/linux/mmc/card.h
> @@ -393,7 +393,7 @@ struct mmc_driver {
> struct device_driver drv;
> int (*probe)(struct mmc_card *);
> void (*remove)(struct mmc_card *);
> - int (*suspend)(struct mmc_card *, pm_message_t);
> + int (*suspend)(struct mmc_card *);
> int (*resume)(struct mmc_card *);
> };
>
>
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