mmc: Add "ignore mmc pm notify" functionality

Signed-off-by: Dmitry Shmidt <dimitrysh@google.com>

diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 2a3593d9f87df3bf01bb4229d74c5aef12ed3fdd..f5bb7c769c3e7a7ede4471e9175c9da71c724515 100644 (file)
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -511,7 +511,8 @@ int mmc_add_host(struct mmc_host *host)
        mmc_host_clk_sysfs_init(host);
 
        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;
 }
@@ -528,7 +529,9 @@ 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 4a139204c20c0bb8aab7a7759c74e7e5d5cde9a4..6e2d6a135c7e0d75f830af3a429fb5bc02ca07b2 100644 (file)
--- 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 /* LINUX_MMC_PM_H */