drm/amdgpu: create fence slab once when amdgpu module init.

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This avoids problems with multiple GPUs.  For example,
if the first GPU failed before amdgpu_fence_init() was
called, amdgpu_fence_slab_ref is still 0 and it will
get decremented in amdgpu_fence_driver_fini().  This
will lead to a crash during init of the second GPU since
amdgpu_fence_slab_ref is not 0.

v2: add functions for init/exit instead of
    moving the variables into the driver.

Signed-off-by: Rex Zhu <Rex.Zhu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Rex Zhu 2016-05-12 13:27:28 +08:00 • committed by Alex Deucher

parent 8b41e7a03a

commit d573de2d00

3 changed files with 20 additions and 12 deletions

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2

drivers/gpu/drm/amd/amdgpu/amdgpu.h

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5

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

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25

drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c

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