Hi,
While working with "permanent" mmc/sdio devices we may want to skip new
suspend/resume functionality.
commit 4c40080bb1d4f68000b7a4c397c1bc8a623668fa
Author: Dmitry Shmidt <dimitrysh@xxxxxxxxxxx>
Date: Mon Oct 11 11:28:54 2010 -0700
mmc: Add "ignore mmc pm notify" functionality
Signed-off-by: Dmitry Shmidt <dimitrysh@xxxxxxxxxxx>
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index d80cfdc..ba684e6 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -137,7 +137,8 @@ int mmc_add_host(struct mmc_host *host)
#endif
mmc_start_host(host);
- register_pm_notifier(&host->pm_notify);
+ if (!(host->pm_flags & MMC_PM_IGNORE_PM_NOTIFY))
+ register_pm_notifier(&host->pm_notify);
return 0;
}
@@ -154,7 +155,9 @@ EXPORT_SYMBOL(mmc_add_host);
*/
void mmc_remove_host(struct mmc_host *host)
{
- unregister_pm_notifier(&host->pm_notify);
+ if (!(host->pm_flags & MMC_PM_IGNORE_PM_NOTIFY))
+ unregister_pm_notifier(&host->pm_notify);
+
mmc_stop_host(host);
#ifdef CONFIG_DEBUG_FS
diff --git a/include/linux/mmc/pm.h b/include/linux/mmc/pm.h
index d37aac4..3903823 100644
--- a/include/linux/mmc/pm.h
+++ b/include/linux/mmc/pm.h
@@ -26,5 +26,6 @@ typedef unsigned int mmc_pm_flag_t;
#define MMC_PM_KEEP_POWER (1 << 0) /* preserve card power during
suspend */
#define MMC_PM_WAKE_SDIO_IRQ (1 << 1) /* wake up host system on SDIO
IRQ assertion */
+#define MMC_PM_IGNORE_PM_NOTIFY (1 << 2) /* ignore mmc pm notify
*/
#endif
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