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-rw-r--r--drivers/mmc/core/core.c35
-rw-r--r--drivers/mmc/core/core.h4
-rw-r--r--drivers/mmc/core/mmc.c15
-rw-r--r--drivers/mmc/core/sd.c15
-rw-r--r--drivers/mmc/core/sdio.c54
5 files changed, 69 insertions, 54 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 0842f68..7dab2e5 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -1236,6 +1236,8 @@ EXPORT_SYMBOL(mmc_card_can_sleep);
*/
int mmc_suspend_host(struct mmc_host *host, pm_message_t state)
{
+ int err = 0;
+
if (host->caps & MMC_CAP_DISABLE)
cancel_delayed_work(&host->disable);
cancel_delayed_work(&host->detect);
@@ -1244,21 +1246,26 @@ int mmc_suspend_host(struct mmc_host *host, pm_message_t state)
mmc_bus_get(host);
if (host->bus_ops && !host->bus_dead) {
if (host->bus_ops->suspend)
- host->bus_ops->suspend(host);
- if (!host->bus_ops->resume) {
+ 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);
+ err = 0;
}
}
mmc_bus_put(host);
- mmc_power_off(host);
+ if (!err)
+ mmc_power_off(host);
- return 0;
+ return err;
}
EXPORT_SYMBOL(mmc_suspend_host);
@@ -1269,12 +1276,26 @@ EXPORT_SYMBOL(mmc_suspend_host);
*/
int mmc_resume_host(struct mmc_host *host)
{
+ int err = 0;
+
mmc_bus_get(host);
if (host->bus_ops && !host->bus_dead) {
mmc_power_up(host);
mmc_select_voltage(host, host->ocr);
BUG_ON(!host->bus_ops->resume);
- host->bus_ops->resume(host);
+ err = host->bus_ops->resume(host);
+ if (err) {
+ printk(KERN_WARNING "%s: error %d during resume "
+ "(card was removed?)\n",
+ mmc_hostname(host), err);
+ if (host->bus_ops->remove)
+ host->bus_ops->remove(host);
+ mmc_claim_host(host);
+ mmc_detach_bus(host);
+ mmc_release_host(host);
+ /* no need to bother upper layers */
+ err = 0;
+ }
}
mmc_bus_put(host);
@@ -1284,7 +1305,7 @@ int mmc_resume_host(struct mmc_host *host)
*/
mmc_detect_change(host, 1);
- return 0;
+ return err;
}
EXPORT_SYMBOL(mmc_resume_host);
diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h
index c386348..67ae6ab 100644
--- a/drivers/mmc/core/core.h
+++ b/drivers/mmc/core/core.h
@@ -20,8 +20,8 @@ struct mmc_bus_ops {
int (*sleep)(struct mmc_host *);
void (*remove)(struct mmc_host *);
void (*detect)(struct mmc_host *);
- void (*suspend)(struct mmc_host *);
- void (*resume)(struct mmc_host *);
+ int (*suspend)(struct mmc_host *);
+ int (*resume)(struct mmc_host *);
void (*power_save)(struct mmc_host *);
void (*power_restore)(struct mmc_host *);
};
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index ddddad4..bfefce3 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -530,7 +530,7 @@ static void mmc_detect(struct mmc_host *host)
/*
* Suspend callback from host.
*/
-static void mmc_suspend(struct mmc_host *host)
+static int mmc_suspend(struct mmc_host *host)
{
BUG_ON(!host);
BUG_ON(!host->card);
@@ -540,6 +540,8 @@ static void mmc_suspend(struct mmc_host *host)
mmc_deselect_cards(host);
host->card->state &= ~MMC_STATE_HIGHSPEED;
mmc_release_host(host);
+
+ return 0;
}
/*
@@ -548,7 +550,7 @@ static void mmc_suspend(struct mmc_host *host)
* This function tries to determine if the same card is still present
* and, if so, restore all state to it.
*/
-static void mmc_resume(struct mmc_host *host)
+static int mmc_resume(struct mmc_host *host)
{
int err;
@@ -559,14 +561,7 @@ static void mmc_resume(struct mmc_host *host)
err = mmc_init_card(host, host->ocr, host->card);
mmc_release_host(host);
- if (err) {
- mmc_remove(host);
-
- mmc_claim_host(host);
- mmc_detach_bus(host);
- mmc_release_host(host);
- }
-
+ return err;
}
static void mmc_power_restore(struct mmc_host *host)
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index 13b3a6b..10b2a4d 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -564,7 +564,7 @@ static void mmc_sd_detect(struct mmc_host *host)
/*
* Suspend callback from host.
*/
-static void mmc_sd_suspend(struct mmc_host *host)
+static int mmc_sd_suspend(struct mmc_host *host)
{
BUG_ON(!host);
BUG_ON(!host->card);
@@ -574,6 +574,8 @@ static void mmc_sd_suspend(struct mmc_host *host)
mmc_deselect_cards(host);
host->card->state &= ~MMC_STATE_HIGHSPEED;
mmc_release_host(host);
+
+ return 0;
}
/*
@@ -582,7 +584,7 @@ static void mmc_sd_suspend(struct mmc_host *host)
* This function tries to determine if the same card is still present
* and, if so, restore all state to it.
*/
-static void mmc_sd_resume(struct mmc_host *host)
+static int mmc_sd_resume(struct mmc_host *host)
{
int err;
@@ -593,14 +595,7 @@ static void mmc_sd_resume(struct mmc_host *host)
err = mmc_sd_init_card(host, host->ocr, host->card);
mmc_release_host(host);
- if (err) {
- mmc_sd_remove(host);
-
- mmc_claim_host(host);
- mmc_detach_bus(host);
- mmc_release_host(host);
- }
-
+ return err;
}
static void mmc_sd_power_restore(struct mmc_host *host)
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index f4c8637..cdb845b 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -302,6 +302,7 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
goto err;
}
card = oldcard;
+ return 0;
}
/*
@@ -399,62 +400,65 @@ static void mmc_sdio_detect(struct mmc_host *host)
* Therefore all registered functions must have drivers with suspend
* and resume methods. Failing that we simply remove the whole card.
*/
-static void mmc_sdio_suspend(struct mmc_host *host)
+static int mmc_sdio_suspend(struct mmc_host *host)
{
- int i;
+ int i, err = 0;
- /* make sure all registered functions can suspend/resume */
for (i = 0; i < host->card->sdio_funcs; i++) {
struct sdio_func *func = host->card->sdio_func[i];
if (func && sdio_func_present(func) && func->dev.driver) {
const struct dev_pm_ops *pmops = func->dev.driver->pm;
if (!pmops || !pmops->suspend || !pmops->resume) {
- /* just remove the entire card in that case */
- mmc_sdio_remove(host);
- mmc_claim_host(host);
- mmc_detach_bus(host);
- mmc_release_host(host);
- return;
- }
+ /* force removal of entire card in that case */
+ err = -ENOSYS;
+ } else
+ err = pmops->suspend(&func->dev);
+ if (err)
+ break;
}
}
-
- /* now suspend them */
- for (i = 0; i < host->card->sdio_funcs; i++) {
+ while (err && --i >= 0) {
struct sdio_func *func = host->card->sdio_func[i];
if (func && sdio_func_present(func) && func->dev.driver) {
const struct dev_pm_ops *pmops = func->dev.driver->pm;
- pmops->suspend(&func->dev);
+ pmops->resume(&func->dev);
}
}
+
+ return err;
}
-static void mmc_sdio_resume(struct mmc_host *host)
+static int mmc_sdio_resume(struct mmc_host *host)
{
int i, err;
BUG_ON(!host);
BUG_ON(!host->card);
+ /* Basic card reinitialization. */
mmc_claim_host(host);
err = mmc_sdio_init_card(host, host->ocr, host->card);
mmc_release_host(host);
- if (err) {
- mmc_sdio_remove(host);
- mmc_claim_host(host);
- mmc_detach_bus(host);
- mmc_release_host(host);
- return;
- }
- /* resume all functions */
- for (i = 0; i < host->card->sdio_funcs; i++) {
+ /*
+ * If the card looked to be the same as before suspending, then
+ * we proceed to resume all card functions. If one of them returns
+ * an error then we simply return that error to the core and the
+ * card will be redetected as new. It is the responsibility of
+ * the function driver to perform further tests with the extra
+ * knowledge it has of the card to confirm the card is indeed the
+ * same as before suspending (same MAC address for network cards,
+ * etc.) and return an error otherwise.
+ */
+ for (i = 0; !err && i < host->card->sdio_funcs; i++) {
struct sdio_func *func = host->card->sdio_func[i];
if (func && sdio_func_present(func) && func->dev.driver) {
const struct dev_pm_ops *pmops = func->dev.driver->pm;
- pmops->resume(&func->dev);
+ err = pmops->resume(&func->dev);
}
}
+
+ return err;
}
static const struct mmc_bus_ops mmc_sdio_ops = {
generated by cgit v1.1 at 2024-12-25 22:01:02 +0000