From: Chen Yu <yu.c.chen@xxxxxxxxx> The PM core introduced the ability to keep devices runtime suspended during the entire system sleep process with commit aae4518b3124 ("PM / sleep: Mechanism to avoid resuming runtime-suspended devices unnecessarily"). Drivers opt in to this so-called "direct_complete" mechanism by returning a positive value from their ->prepare hook. Usually this is achieved with a "return 1;" statement, which looks somewhat cryptic to readers not intimately familiar with the PM core. Improve clarity by defining a DPM_DIRECT_COMPLETE constant which drivers may use instead. Suggested-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Acked-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx> Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Cc: Lee Jones <lee.jones@xxxxxxxxxx> Signed-off-by: Chen Yu <yu.c.chen@xxxxxxxxx> [LW: separate this hunk out of mfd patch, add commit message] Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx> --- include/linux/pm.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/linux/pm.h b/include/linux/pm.h index f926af4..2d651a3 100644 --- a/include/linux/pm.h +++ b/include/linux/pm.h @@ -788,4 +788,11 @@ enum dpm_order { DPM_ORDER_DEV_LAST, }; +/* + * Return this from system suspend/hibernation ->prepare() callback to + * request the core to leave the device runtime-suspended during system + * suspend if possible. + */ +#define DPM_DIRECT_COMPLETE 1 + #endif /* _LINUX_PM_H */ -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html