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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-06-03 21:49:52 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-06-03 21:49:52 +0200 |
| commit | 45f0a85c8258741d11bda25c0a5669c06267204a (patch) | |
| tree | a618cce0583426a5c7f53f56cf19139a6f9733ce /drivers/dma/intel_mid_dma.c | |
| parent | cd38ca854de15b26eb91009137cbe157d8a8e773 (diff) | |
| download | linux-45f0a85c8258741d11bda25c0a5669c06267204a.tar.gz linux-45f0a85c8258741d11bda25c0a5669c06267204a.tar.bz2 linux-45f0a85c8258741d11bda25c0a5669c06267204a.zip | |
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>
Diffstat (limited to 'drivers/dma/intel_mid_dma.c')
| -rw-r--r-- | drivers/dma/intel_mid_dma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/dma/intel_mid_dma.c b/drivers/dma/intel_mid_dma.c index a0de82e21a7c..a975ebebea8a 100644 --- a/drivers/dma/intel_mid_dma.c +++ b/drivers/dma/intel_mid_dma.c @@ -1405,7 +1405,7 @@ static int dma_runtime_idle(struct device *dev) return -EAGAIN; } - return pm_schedule_suspend(dev, 0); + return 0; } /****************************************************************************** |