this is to prevent fence forever waiting if FLR occured during register accessing.
v2: use define instead of hardcode for the timeout msec Change-Id: I32cc219a08f5a67654beb26c45d1b95d2b60cc96 Signed-off-by: Monk Liu <[email protected]> Reviewed-by: Christian König <[email protected]> --- drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c index 966bf7f..757cbc4 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c @@ -22,6 +22,7 @@ */ #include "amdgpu.h" +#define MAX_KIQ_REG_WAIT 100000 int amdgpu_allocate_static_csa(struct amdgpu_device *adev) { @@ -128,10 +129,12 @@ uint32_t amdgpu_virt_kiq_rreg(struct amdgpu_device *adev, uint32_t reg) amdgpu_ring_commit(ring); mutex_unlock(&kiq->ring_mutex); - r = fence_wait(f, false); - if (r) - DRM_ERROR("wait for kiq fence error: %ld.\n", r); + r = fence_wait_timeout(f, false, msecs_to_jiffies(MAX_KIQ_REG_WAIT)); fence_put(f); + if (r < 1) { + DRM_ERROR("wait for kiq fence error: %ld.\n", r); + return ~0; + } val = adev->wb.wb[adev->virt.reg_val_offs]; @@ -154,8 +157,8 @@ void amdgpu_virt_kiq_wreg(struct amdgpu_device *adev, uint32_t reg, uint32_t v) amdgpu_ring_commit(ring); mutex_unlock(&kiq->ring_mutex); - r = fence_wait(f, false); - if (r) + r = fence_wait_timeout(f, false, msecs_to_jiffies(MAX_KIQ_REG_WAIT)); + if (r < 1) DRM_ERROR("wait for kiq fence error: %ld.\n", r); fence_put(f); } -- 2.7.4 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
