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drm/radeon: fix semaphore value init
Semaphore values have 64 bits, not 32. This fixes a very subtle bug that disables synchronization when the upper 32bits wasn't zero. Signed-off-by: Christian König <christian.koenig@amd.com> Cc: stable@vger.kernel.org Reviewed-By: Grigori Goronzy <greg@chown.ath.cx> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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