[RFC/PATCH] mmc: omap_hsmmc: introduce omap_hsmmc_prepare/complete

[Venkatraman S]

On Mon, Oct 22, 2012 at 6:29 PM, Felipe Balbi <balbi at ti.com> wrote:
> prepare() is supposed to prevent new children from
> being registered. On the MMC subsystem, children
> (new cards) registration starts with the card
> detect IRQ.
>
> Move card detect IRQ disabling to prepare() so that
> no new cards will be registered while we're trying
> to suspend.
>
> Likewise, move card detect IRQ enabling to complete()
> so we only try to register new children after our MMC
> IP is back up.
>
> Signed-off-by: Felipe Balbi <balbi at ti.com>
> ---
>
> Venkat, do you think the patch below makes sense ?

Except for the minor nit mentioned below, it works well.
I'll include it in my patch series.

>
> cheers
>
>  drivers/mmc/host/omap_hsmmc.c | 45 ++++++++++++++++++++++++-------------------
>  1 file changed, 25 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
> index 54bfd0c..4c8b41e 100644
> --- a/drivers/mmc/host/omap_hsmmc.c
> +++ b/drivers/mmc/host/omap_hsmmc.c
> @@ -2022,6 +2022,26 @@ static int __devexit omap_hsmmc_remove(struct platform_device *pdev)
>  }
>
>  #ifdef CONFIG_PM
> +static int omap_hsmmc_prepare(struct device *dev)
> +{
> +       struct omap_hsmmc_host *host = dev_get_drvdata(dev);
> +
> +       if (host->pdata->suspend)
> +               return host->pdata->suspend(dev, host->slot_id);
> +
> +       return 0;
> +}
> +
> +static int omap_hsmmc_complete(struct device *dev)

The .complete() function prototype requires to return void.
This one emits a compilation warning.