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authorUlf Hansson <ulf.hansson@linaro.org>2013-06-10 17:03:39 +0200
committerChris Ball <cjb@laptop.org>2013-06-27 12:39:17 -0400
commit986892ca78eeddd9d6b629050fea432979ddd321 (patch)
tree32c3d793438b848af46ff10b7fcb28cb3982e4d0 /drivers/mmc
parent74590263384e5d4601de7f0ee2790477578829ea (diff)
downloadlinux-986892ca78eeddd9d6b629050fea432979ddd321.tar.bz2
mmc: core: Initiate suspend|resume from mmc bus instead of mmc host
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@linaro.org> Tested-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/core/bus.c19
-rw-r--r--drivers/mmc/core/core.c26
2 files changed, 19 insertions, 26 deletions
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index d9e8c2b7f4c5..3b7ca8ac0e61 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);
- int ret = 0;
+ struct mmc_host *host = card->host;
+ int ret;
- if (dev->driver && drv->suspend)
+ if (dev->driver && drv->suspend) {
ret = drv->suspend(card);
+ if (ret)
+ return ret;
+ }
+
+ ret = host->bus_ops->suspend(host);
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);
- int ret = 0;
+ struct mmc_host *host = card->host;
+ int ret;
+
+ ret = host->bus_ops->resume(host);
+ 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 da3b9078ea65..49a5bca418bd 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);