Hi Ulf,
On 05/30/2013 09:53 PM, Ulf Hansson wrote:
> From: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
>
> The host should be responsible to suspend|resume the host and not the
> card. This patch changes this behaviour, by moving the responsiblity
> to the mmc bus instead which already holds the card device.
>
> The exported functions mmc_suspend|resume_host are now to be considered
> as depcrecated. Once all host drivers moves away from using them, we
> can remove them. As of now, a successful error code is always returned.
>
> Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
> ---
> drivers/mmc/core/bus.c | 15 ++++++++++++++-
> drivers/mmc/core/core.c | 26 +++-----------------------
> 2 files changed, 17 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
> index d9e8c2b..2842684 100644
> --- a/drivers/mmc/core/bus.c
> +++ b/drivers/mmc/core/bus.c
> @@ -127,10 +127,16 @@ 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);
> + struct mmc_host *host = card->host;
> int ret = 0;
>
> - if (dev->driver && drv->suspend)
> + if (dev->driver && drv->suspend) {
> ret = drv->suspend(card);
> + if (ret)
> + return ret;
> + }
> +
> + ret = host->bus_ops->suspend(host);
Need not to check whether host->bus_ops->suspend is existed or not?
> return ret;
> }
>
> @@ -138,10 +144,17 @@ static int mmc_bus_resume(struct device *dev)
> {
> struct mmc_driver *drv = to_mmc_driver(dev->driver);
> struct mmc_card *card = mmc_dev_to_card(dev);
> + struct mmc_host *host = card->host;
> int ret = 0;
>
> + ret = host->bus_ops->resume(host);
Ditto
Best Regards,
Jaehoon Chung
> + if (ret)
> + pr_warn("%s: error %d during resume (card was removed?)\n",
> + mmc_hostname(host), ret);
> +
> if (dev->driver && drv->resume)
> ret = drv->resume(card);
> +
> return ret;
> }
> #endif
> diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
> index da3b907..49a5bca 100644
> --- a/drivers/mmc/core/core.c
> +++ b/drivers/mmc/core/core.c
> @@ -2619,16 +2619,8 @@ EXPORT_SYMBOL(mmc_cache_ctrl);
> */
> int mmc_suspend_host(struct mmc_host *host)
> {
> - int err = 0;
> -
> - mmc_bus_get(host);
> - if (host->bus_ops && !host->bus_dead) {
> - if (host->bus_ops->suspend)
> - err = host->bus_ops->suspend(host);
> - }
> - mmc_bus_put(host);
> -
> - return err;
> + /* This function is deprecated */
> + return 0;
> }
> EXPORT_SYMBOL(mmc_suspend_host);
>
> @@ -2638,19 +2630,7 @@ EXPORT_SYMBOL(mmc_suspend_host);
> */
> int mmc_resume_host(struct mmc_host *host)
> {
> - int err;
> -
> - mmc_bus_get(host);
> - if (host->bus_ops && !host->bus_dead) {
> - BUG_ON(!host->bus_ops->resume);
> - err = host->bus_ops->resume(host);
> - if (err)
> - pr_warning("%s: error %d during resume "
> - "(card was removed?)\n",
> - mmc_hostname(host), err);
> - }
> - mmc_bus_put(host);
> -
> + /* This function is deprecated */
> return 0;
> }
> EXPORT_SYMBOL(mmc_resume_host);
>
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