From: Chen Yu Date: Fri, 23 Oct 2020 11:02:54 +0000 (+0800) Subject: PM: sleep: Print driver flags for all devices during suspend/resume X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=f39ee99f5118a71ea162f8f66d743a8c4c401540;p=linux.git PM: sleep: Print driver flags for all devices during suspend/resume Currently there are 4 driver flags to control system suspend/resume behavior: DPM_FLAG_NO_DIRECT_COMPLETE, DPM_FLAG_SMART_PREPARE, DPM_FLAG_SMART_SUSPEND and DPM_FLAG_MAY_SKIP_RESUME. Print these flags during suspend/resume so as to get a brief understanding of the expected behavior of each device, and to facilitate suspend/resume debugging/tuning. To enable this tracing: echo 'file drivers/base/power/main.c +p' > /sys/kernel/debug/dynamic_debug/control Signed-off-by: Chen Yu [ rjw: Subject and changelog edits ] Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index c7ac49042cee6..2b4255dc101e0 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -441,9 +441,9 @@ static pm_callback_t pm_noirq_op(const struct dev_pm_ops *ops, pm_message_t stat static void pm_dev_dbg(struct device *dev, pm_message_t state, const char *info) { - dev_dbg(dev, "%s%s%s\n", info, pm_verb(state.event), + dev_dbg(dev, "%s%s%s driver flags: %x\n", info, pm_verb(state.event), ((state.event & PM_EVENT_SLEEP) && device_may_wakeup(dev)) ? - ", may wakeup" : ""); + ", may wakeup" : "", dev->power.driver_flags); } static void pm_dev_err(struct device *dev, pm_message_t state, const char *info,