From: Rafael J. Wysocki Date: Fri, 1 Dec 2017 13:58:34 +0000 (+0100) Subject: PM / runtime: Fix handling of suppliers with disabled runtime PM X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=31eb7431805493e10f4731f366cf4d4e3e952035;p=linux.git PM / runtime: Fix handling of suppliers with disabled runtime PM Prevent rpm_get_suppliers() from returning an error code if runtime PM is disabled for one or more of the supplier devices it wants to runtime-resume, so as to make runtime PM work for devices with links to suppliers that don't use runtime PM (such links may be created during device enumeration even before it is known whether or not runtime PM will be enabled for the devices in question, for example). Fixes: 21d5c57b3726 (PM / runtime: Use device links) Reported-by: Adrian Hunter Signed-off-by: Rafael J. Wysocki Reviewed-by: Lukas Wunner Tested-by: Adrian Hunter --- diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index 027d159ac3810..6e89b51ea3d92 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -276,7 +276,8 @@ static int rpm_get_suppliers(struct device *dev) continue; retval = pm_runtime_get_sync(link->supplier); - if (retval < 0) { + /* Ignore suppliers with disabled runtime PM. */ + if (retval < 0 && retval != -EACCES) { pm_runtime_put_noidle(link->supplier); return retval; }