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| author | Jean Pihet <jean.pihet@newoldbits.com> | 2012-09-19 14:17:20 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2012-09-19 14:17:20 +0200 |
| commit | fc2fb3a075c206927d3fbad251dae82ba82ccf2d (patch) | |
| tree | 12306571287f05058831654bbe516e54e0e76546 /CREDITS | |
| parent | c6a57bfffea5b673e5b4f9aeff85a00607e59077 (diff) | |
| download | blackbird-op-linux-fc2fb3a075c206927d3fbad251dae82ba82ccf2d.tar.gz blackbird-op-linux-fc2fb3a075c206927d3fbad251dae82ba82ccf2d.zip | |
PM QoS: Use spinlock in the per-device PM QoS constraints code
The per-device PM QoS locking requires a spinlock to be used. The reasons
are:
- an alignement with the PM QoS core code, which is used by the per-device
PM QoS code for the constraints lists management. The PM QoS core code
uses spinlocks to protect the constraints lists,
- some drivers need to use the per-device PM QoS functionality from
interrupt context or spinlock protected context.
An example of such a driver is the OMAP HSI (high-speed synchronous serial
interface) driver which needs to control the IP block idle state
depending on the FIFO empty state, from interrupt context.
Reported-by: Djamil Elaidi <d-elaidi@ti.com>
Signed-off-by: Jean Pihet <j-pihet@ti.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Diffstat (limited to 'CREDITS')
0 files changed, 0 insertions, 0 deletions
