PM: runtime: Clarify ->runtime_idle() callback return value handling

This doc says "Negative error return codes are ignored by the PM core"
for ->runtime_idle(). This is misleading: any non-zero return value
(including negative error codes such as -EBUSY or -EAGAIN) tells the PM
core to abort automatic suspension of the device, which is commonly used
by subsystems to prevent immediate runtime suspend.

Clarify that unlike ->runtime_suspend() and ->runtime_resume(), the PM core
does not treat negative return values from ->runtime_idle() as a fatal
device error, and that any non-zero value stops the PM core from
suspending the device.

Signed-off-by: Brian Norris <briannorris@chromium.org>
Link: https://patch.msgid.link/20260929194956.v3.5.If6e26acac7770c65446dd0b81f891948abb38973@changeid
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

0 files changed, 0 insertions, 0 deletions