On ke, 2015-11-18 at 12:56 +0200, Imre Deak wrote: > The runtime PM core doesn't treat EBUSY and EAGAIN retvals from the driver > suspend hooks as errors, but they still show up as errors in dmesg. Tune > them down. > > One problem caused by this was noticed by Daniel: the i915 driver > returns EAGAIN to signal a temporary failure to suspend and as a request > towards the RPM core for scheduling a suspend again. This is a normal > event, but the resulting error message flags a breakage during the > driver's automated testing which parses dmesg and picks up the error. > > v2: > - fix compile breake when CONFIG_PM_SLEEP=n (0-day builder) > > Reported-by: Daniel Vetter <daniel.vet...@intel.com> > Signed-off-by: Imre Deak <imre.d...@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=92992 > --- > drivers/base/power/main.c | 7 +++++-- > drivers/pci/pci-driver.c | 2 +- > include/linux/pm.h | 11 +++++++++-- > 3 files changed, 15 insertions(+), 5 deletions(-) > > diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c > index 1710c26..39d2090 100644 > --- a/drivers/base/power/main.c > +++ b/drivers/base/power/main.c > @@ -1679,9 +1679,12 @@ int dpm_suspend_start(pm_message_t state) > } > EXPORT_SYMBOL_GPL(dpm_suspend_start); > > -void __suspend_report_result(const char *function, void *fn, int ret) > +void __suspend_report_result(const char *function, void *fn, int ret, > + bool runtime_pm) > { > - if (ret) > + if (runtime_pm && (ret == -EBUSY || ret == -EAGAIN)) > + printk(KERN_DEBUG "%s(): %pF returns %d\n", function, fn, ret); > + else if (ret) > printk(KERN_ERR "%s(): %pF returns %d\n", function, fn, ret); > } > EXPORT_SYMBOL_GPL(__suspend_report_result); > diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c > index 108a311..9569572 100644 > --- a/drivers/pci/pci-driver.c > +++ b/drivers/pci/pci-driver.c > @@ -1142,7 +1142,7 @@ static int pci_pm_runtime_suspend(struct device *dev) > pci_dev->state_saved = false; > pci_dev->no_d3cold = false; > error = pm->runtime_suspend(dev); > - suspend_report_result(pm->runtime_suspend, error); > + rpm_suspend_report_result(pm->runtime_suspend, error); > if (error) > return error; > if (!pci_dev->d3cold_allowed) > diff --git a/include/linux/pm.h b/include/linux/pm.h > index 35d599e..54f37e3 100644 > --- a/include/linux/pm.h > +++ b/include/linux/pm.h > @@ -702,11 +702,17 @@ extern int dpm_suspend_late(pm_message_t state); > extern int dpm_suspend(pm_message_t state); > extern int dpm_prepare(pm_message_t state); > > -extern void __suspend_report_result(const char *function, void *fn, int ret); > +extern void __suspend_report_result(const char *function, void *fn, int ret, > + bool runtime_pm); > > #define suspend_report_result(fn, ret) > \ > do { \ > - __suspend_report_result(__func__, fn, ret); \ > + __suspend_report_result(__func__, fn, ret, false); \ > + } while (0) > + > +#define rpm_suspend_report_result(fn, ret) \ > + do { \ > + __suspend_report_result(__func__, fn, ret, true); \ > } while (0) > > extern int device_pm_wait_for_dev(struct device *sub, struct device *dev); > @@ -744,6 +750,7 @@ static inline int dpm_suspend_start(pm_message_t state) > } > > #define suspend_report_result(fn, ret) do {} while (0) > +#define rpm_suspend_report_result(fn, ret) do {} while (0) > > static inline int device_pm_wait_for_dev(struct device *a, struct device *b) > { _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
