Rafael J. Wysocki 45f0a85c82
PM / Runtime: Rework the "runtime idle" helper routine ...
The "runtime idle" helper routine, rpm_idle(), currently ignores
return values from .runtime_idle() callbacks executed by it.
However, it turns out that many subsystems use
pm_generic_runtime_idle() which checks the return value of the
driver's callback and executes pm_runtime_suspend() for the device
unless that value is not 0. If that logic is moved to rpm_idle()
instead, pm_generic_runtime_idle() can be dropped and its users
will not need any .runtime_idle() callbacks any more.
Moreover, the PCI, SCSI, and SATA subsystems' .runtime_idle()
routines, pci_pm_runtime_idle(), scsi_runtime_idle(), and
ata_port_runtime_idle(), respectively, as well as a few drivers'
ones may be simplified if rpm_idle() calls rpm_suspend() after 0 has
been returned by the .runtime_idle() callback executed by it.
To reduce overall code bloat, make the changes described above.
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com >
Tested-by: Kevin Hilman <khilman@linaro.org >
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com >
Acked-by: Kevin Hilman <khilman@linaro.org >
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org >
Acked-by: Alan Stern <stern@rowland.harvard.edu >
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