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| /openbmc/linux/drivers/gpu/drm/i915/ |
| H A D | i915_irq.c | diff 792496368bcd766926239a5ad105ca9aad797b34 Fri Sep 07 21:43:42 CDT 2012 Ben Widawsky <ben@bwidawsk.net> drm/i915: Error checks in gen6_set_rps
With the new "standardized" sysfs interfaces we need to be a bit more
careful about setting the RPS values.
Because the sysfs code and the rps workqueue can run at the same time,
if the sysfs setter wins the race to the mutex, the workqueue can come
in and set a value which is out of range (ie. we're no longer protecting
by RPINTLIM).
I was not able to actually make this error occur in testing.
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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