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| author | Ulf Hansson <ulf.hansson@linaro.org> | 2021-06-08 12:02:48 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-14 12:15:21 +0300 |
| commit | 2cbbd78e08bc8645a2a39eba17f0bcbbf467a6f4 (patch) | |
| tree | 64db5f84b94d18a944237f90f40233622ff4bda1 /drivers | |
| parent | 46026bb057c35f5bb111bf95e00cd8366d2e34d4 (diff) | |
| download | linux-2cbbd78e08bc8645a2a39eba17f0bcbbf467a6f4.tar.xz | |
PM: runtime: Improve path in rpm_idle() when no callback
[ Upstream commit 5a2bd1b1c64e1ac5627db3767ac465f18606315c ]
When pm_runtime_no_callbacks() has been called for a struct device to set
the dev->power.no_callbacks flag for it, it enables rpm_idle() to take a
slightly quicker path by assuming that a ->runtime_idle() callback would
have returned 0 to indicate success.
A device that does not have the dev->power.no_callbacks flag set for it,
may still be missing a corresponding ->runtime_idle() callback, in which
case the slower path in rpm_idle() is taken. Let's improve the behaviour
for this case, by aligning code to the quicker path.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Stable-dep-of: bc80c2e438dc ("PM: runtime: Do not call __rpm_callback() from rpm_idle()")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/power/runtime.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c index 835a39e84c1d..532d910fe1cf 100644 --- a/drivers/base/power/runtime.c +++ b/drivers/base/power/runtime.c @@ -464,7 +464,10 @@ static int rpm_idle(struct device *dev, int rpmflags) /* Pending requests need to be canceled. */ dev->power.request = RPM_REQ_NONE; - if (dev->power.no_callbacks) + callback = RPM_GET_CALLBACK(dev, runtime_idle); + + /* If no callback assume success. */ + if (!callback || dev->power.no_callbacks) goto out; /* Carry out an asynchronous or a synchronous idle notification. */ @@ -480,10 +483,7 @@ static int rpm_idle(struct device *dev, int rpmflags) dev->power.idle_notification = true; - callback = RPM_GET_CALLBACK(dev, runtime_idle); - - if (callback) - retval = __rpm_callback(callback, dev); + retval = __rpm_callback(callback, dev); dev->power.idle_notification = false; wake_up_all(&dev->power.wait_queue); |