drm/radeon: fix a bug with the ring syncing code

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Rings need to lock in order, otherwise
the ring subsystem can deadlock.

v2: fix error handling and number of locked doublewords.
v3: stop creating unneeded semaphores.

Signed-off-by: Christian König <deathsimple@vodafone.de>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

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This commit is contained in:

Christian König 2012-05-02 15:11:18 +02:00 • committed by Dave Airlie

parent bfb9a07785

commit 8f676c4c6f

4 changed files with 93 additions and 50 deletions

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4

drivers/gpu/drm/radeon/radeon.h

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37

drivers/gpu/drm/radeon/radeon_cs.c

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56

drivers/gpu/drm/radeon/radeon_semaphore.c

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46

drivers/gpu/drm/radeon/radeon_ttm.c

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