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drm.7039
0113-drm-amdgpu-check-ring-being-ready-before-u...
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File 0113-drm-amdgpu-check-ring-being-ready-before-using.patch of Package drm.7039
From 8895ef4e5357fa54e614c5654eb4416623c2feb6 Mon Sep 17 00:00:00 2001 From: Ding Pixel <pding@amd.com> Date: Wed, 18 Jan 2017 17:26:38 +0800 Subject: [PATCH] drm/amdgpu: check ring being ready before using Mime-version: 1.0 Content-type: text/plain; charset=UTF-8 Content-transfer-encoding: 8bit References: bsc#1041744 [ Upstream commit c5f21c9f878b8dcd54d0b9739c025ca73cb4c091 ] Return success when the ring is properly initialized, otherwise return failure. Tonga SRIOV VF doesn't have UVD and VCE engines, the initialization of these IPs is bypassed. The system crashes if application submit IB to their rings which are not ready to use. It could be a common issue if IP having ring buffer is disabled for some reason on specific ASIC, so it should check the ring being ready to use. Bug: amdgpu_test crashes system on Tonga VF. Signed-off-by: Ding Pixel <Pixel.Ding@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Takashi Iwai <tiwai@suse.de> --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index 82dc8d20e28a..bfb4b91869e7 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -83,6 +83,13 @@ int amdgpu_cs_get_ring(struct amdgpu_device *adev, u32 ip_type, } break; } + + if (!(*out_ring && (*out_ring)->adev)) { + DRM_ERROR("Ring %d is not initialized on IP %d\n", + ring, ip_type); + return -EINVAL; + } + return 0; } -- 2.13.2
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