2016-06-01 Christian König deathsimple@vodafone.de:
From: Christian König christian.koenig@amd.com
Fence contexts are created on the fly (for example) by the GPU scheduler used in the amdgpu driver as a result of an userspace request. Because of this userspace could in theory force a wrap around of the 32bit context number if it doesn't behave well.
Avoid this by increasing the context number to 64bits. This way even when userspace manages to allocate a billion contexts per second it takes more than 500 years for the context number to wrap around.
v2: fix printf formats as well.
Signed-off-by: Christian König christian.koenig@amd.com
drivers/dma-buf/fence.c | 8 ++++---- drivers/gpu/drm/amd/amdgpu/amdgpu.h | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_sa.c | 2 +- drivers/gpu/drm/etnaviv/etnaviv_gpu.h | 2 +- drivers/gpu/drm/nouveau/nouveau_fence.h | 3 ++- drivers/gpu/drm/qxl/qxl_release.c | 2 +- drivers/gpu/drm/radeon/radeon.h | 2 +- drivers/gpu/drm/vmwgfx/vmwgfx_fence.c | 2 +- drivers/staging/android/sync.h | 3 ++- include/linux/fence.h | 13 +++++++------ 10 files changed, 21 insertions(+), 18 deletions(-)
Reviewed-by: Gustavo Padovan gustavo.padovan@collabora.co.uk
Gustavo