diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2022-05-16 20:12:33 +0200 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2022-05-26 20:56:33 +0200 |
| commit | a0ccc717c4ab3ef572f023fdceffb4b6df496a0d (patch) | |
| tree | eaec551db400ad6c6295d9939bd11515abbdd21f /drivers/gpu | |
| parent | drm/amd/display: add Coverage blend mode for overlay plane (diff) | |
| download | linux-a0ccc717c4ab3ef572f023fdceffb4b6df496a0d.tar.xz linux-a0ccc717c4ab3ef572f023fdceffb4b6df496a0d.zip | |
drm/amdgpu/discovery: validate VCN and SDMA instances
Validate the VCN and SDMA instances against the driver
structure sizes to make sure we don't get into a
situation where the firmware reports more instances than
the driver supports.
Reviewed-by: Guchun Chen <guchun.chen@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c index 16cdfb30b013..47f0344205ed 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c @@ -1130,13 +1130,24 @@ static int amdgpu_discovery_reg_base_init(struct amdgpu_device *adev) adev->vcn.vcn_config[adev->vcn.num_vcn_inst] = ip->revision & 0xc0; ip->revision &= ~0xc0; - adev->vcn.num_vcn_inst++; + if (adev->vcn.num_vcn_inst < AMDGPU_MAX_VCN_INSTANCES) + adev->vcn.num_vcn_inst++; + else + dev_err(adev->dev, "Too many VCN instances: %d vs %d\n", + adev->vcn.num_vcn_inst + 1, + AMDGPU_MAX_VCN_INSTANCES); } if (le16_to_cpu(ip->hw_id) == SDMA0_HWID || le16_to_cpu(ip->hw_id) == SDMA1_HWID || le16_to_cpu(ip->hw_id) == SDMA2_HWID || - le16_to_cpu(ip->hw_id) == SDMA3_HWID) - adev->sdma.num_instances++; + le16_to_cpu(ip->hw_id) == SDMA3_HWID) { + if (adev->sdma.num_instances < AMDGPU_MAX_SDMA_INSTANCES) + adev->sdma.num_instances++; + else + dev_err(adev->dev, "Too many SDMA instances: %d vs %d\n", + adev->sdma.num_instances + 1, + AMDGPU_MAX_SDMA_INSTANCES); + } if (le16_to_cpu(ip->hw_id) == UMC_HWID) adev->gmc.num_umc++; |