drm/omap: fix race with error_irq

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omapdrm tries to avoid error floods by unregistering the error irq when
an error happens, and then registering the error irq again later.
However, the code is racy, as it sometimes tries to unregister the error
irq when it's already unregistered, leading to WARN().

Also, the code only registers the error irq again when something is done
on that particular output, i.e. if only TV is used to flip the buffers,
and LCD is showing a same buffer, an error on LCD will cause the LCD
error irq to be unregistered and never registered again.

To fix this, let's keep the error irqs always enabled and trust the
DRM_ERROR_RATELIMITED to limit the flood.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

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This commit is contained in:

Tomi Valkeinen 2015-02-26 15:20:24 +02:00

parent 3b143fc80c

commit a36af73f5e

1 changed files with 13 additions and 8 deletions

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drivers/gpu/drm/omapdrm/omap_crtc.c

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