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mmc: remove MMC bus legacy suspend/resume method 

MMC bus is using legacy suspend/resume method, which is not compatible if
runtime pm callbacks are used. In this scenario, MMC bus suspend/resume
callbacks cannot be called when system entering S3. So change to use the
new defined dev_pm_ops for system sleeping mode.

Tested on AM335x Platform. Solves major issue/crash reported at
http://www.mail-archive.com/linux-omap@vger.kernel.org/msg65425.html

Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
Tested-by: Hebbar, Gururaja <gururaja.hebbar@ti.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Ulf Hansson <ulf.hansson@stericsson.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Chuanxiao Dong 2012-04-11 19:54:38 +08:00 committed by Chris Ball
parent 4d048f915f
commit 32d317c60e
3 changed files with 11 additions and 19 deletions
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2
drivers/mmc/card/block.c
View File

@ -1824,7 +1824,7 @@ 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);

26
drivers/mmc/core/bus.c
View File

@ -122,14 +122,14 @@ 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;
}
@ -165,20 +165,14 @@ static int mmc_runtime_idle(struct device *dev)
return pm_runtime_suspend(dev);
}
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,
};
#define MMC_PM_OPS_PTR (&mmc_bus_pm_ops)
#else /* !CONFIG_PM_RUNTIME */
#define MMC_PM_OPS_PTR NULL
#endif /* !CONFIG_PM_RUNTIME */
static const struct dev_pm_ops mmc_bus_pm_ops = {
SET_RUNTIME_PM_OPS(mmc_runtime_suspend, mmc_runtime_resume,
mmc_runtime_idle)
SET_SYSTEM_SLEEP_PM_OPS(mmc_bus_suspend, mmc_bus_resume)
};
static struct bus_type mmc_bus_type = {
.name = "mmc",
.dev_attrs = mmc_dev_attrs,
@ -186,9 +180,7 @@ 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)

2
include/linux/mmc/card.h
View File

@ -481,7 +481,7 @@ 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 *);
};