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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-01-30 14:54:29 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-02-03 21:10:37 +0300 |
| commit | e79aee49bcf9ad005b3f2f4cf68b17dc2c22d9c2 (patch) | |
| tree | 15ccff24ec3b0f789c2c0da116551e6759516c94 /drivers/base | |
| parent | 5be6ada39f3f11a14fae9c6c328bcc78cf476e2e (diff) | |
| download | linux-e79aee49bcf9ad005b3f2f4cf68b17dc2c22d9c2.tar.xz | |
PM: Avoid false-positive warnings in dev_pm_domain_set()
There is a WARN_ON() in dev_pm_domain_set() that triggers on attempts
to set the pm_domain pointer for devices with a driver bound.
However, that WARN_ON() triggers on attempts to clear the pointer
too and the test it uses is based on checking the device's
p->knode_driver pointer which still is set when the device bus
type's/driver's ->remove callback has been executed. This
leads to false-positive warnings when bus type code calls
dev_pm_domain_set() to clear the pm_domain pointer after
invoking the driver's ->remove() callback.
To avoid those false-positives, make dev_pm_domain_set() check
if the pointer passed to it is NULL and skip the warning in
that case.
Fixes: 989561de9b51 (PM / Domains: add setter for dev.pm_domain)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Sinan Kaya <okaya@codeaurora.org>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/common.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c index 93ed14cc2252..f6a9ad52cbbf 100644 --- a/drivers/base/power/common.c +++ b/drivers/base/power/common.c @@ -146,7 +146,7 @@ void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd) if (dev->pm_domain == pd) return; - WARN(device_is_bound(dev), + WARN(pd && device_is_bound(dev), "PM domains can only be changed for unbound devices\n"); dev->pm_domain = pd; device_pm_check_callbacks(dev); |