| Message ID | 20201023110254.26360-1-yu.c.chen@intel.com (mailing list archive) |
|---|---|
| State | Mainlined, archived |
| Headers | show |
| Series | PM / suspend: Print the driver flags of device during suspend resume | expand |
On Fri, Oct 23, 2020 at 1:02 PM Chen Yu <yu.c.chen@intel.com> wrote: > > 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 <yu.c.chen@intel.com> > --- > drivers/base/power/main.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c > index 205a06752ca9..be6744bdfc93 100644 > --- a/drivers/base/power/main.c > +++ b/drivers/base/power/main.c > @@ -442,9 +442,9 @@ 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, > -- Applied (with some edits in the subject and changelog) as 5.11 material, thanks!
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c index 205a06752ca9..be6744bdfc93 100644 --- a/drivers/base/power/main.c +++ b/drivers/base/power/main.c @@ -442,9 +442,9 @@ 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,
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 <yu.c.chen@intel.com> --- drivers/base/power/main.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)