drm/radeon: fix & improve ih ring handling v3

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The spinlock was actually there to protect the
rptr, but rptr was read outside of the locked area.

Also we don't really need a spinlock here, an
atomic should to quite fine since we only need to
prevent it from being reentrant.

v2: Keep the spinlock....
v3: Back to an atomic again after finding & fixing the real bug.

Signed-off-by: Christian Koenig <christian.koenig@amd.com>

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This commit is contained in:

Christian Koenig 2012-05-16 21:45:24 +02:00 • committed by Christian König

parent 6823d74003

commit c20dc3698d

5 changed files with 41 additions and 47 deletions

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26

drivers/gpu/drm/radeon/evergreen.c

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29

drivers/gpu/drm/radeon/r600.c

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3

drivers/gpu/drm/radeon/radeon.h

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3

drivers/gpu/drm/radeon/radeon_device.c

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27

drivers/gpu/drm/radeon/si.c

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