linux-kernel - Re: [PATCH] sdio: fix suspend/resume regression

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Date:	Wed, 13 Oct 2010 09:54:29 +0200
From:	Vitaly Wool <vitalywool@...il.com>
To:	Ohad Ben-Cohen <ohad@...ery.com>
Cc:	linux-mmc@...r.kernel.org, Greg Kroah-Hartman <gregkh@...e.de>,
	Maxim Levitsky <maximlevitsky@...il.com>,
	libertas-dev@...ts.infradead.org, Nicolas Pitre <nico@...xnic.net>,
	Sven Neumann <s.neumann@...mfeld.com>,
	linux-kernel@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	Daniel Mack <daniel@...aq.de>,
	Colin Cross <ccross@...roid.com>, Chris Ball <cjb@...top.org>,
	stable@...nel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] sdio: fix suspend/resume regression

Hi Ohad,

On Wed, Oct 13, 2010 at 9:31 AM, Ohad Ben-Cohen <ohad@...ery.com> wrote:

> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index c94565d..515ff39 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -1682,6 +1682,19 @@ int mmc_suspend_host(struct mmc_host *host)
>        if (host->bus_ops && !host->bus_dead) {
>                if (host->bus_ops->suspend)
>                        err = host->bus_ops->suspend(host);
> +               if (err == -ENOSYS || !host->bus_ops->resume) {
> +                       /*
> +                        * We simply "remove" the card in this case.
> +                        * It will be redetected on resume.
> +                        */
> +                       if (host->bus_ops->remove)
> +                               host->bus_ops->remove(host);
> +                       mmc_claim_host(host);
> +                       mmc_detach_bus(host);
> +                       mmc_release_host(host);
> +                       host->pm_flags = 0;
> +                       err = 0;
> +               }
>        }
>        mmc_bus_put(host);
>

what about moving this logic to sdio bus_ops as this seems to be
completely specific to sdio right now?

Thanks,
   Vitaly
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