diff options
| author | Mario Limonciello <mario.limonciello@amd.com> | 2026-08-26 13:51:02 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-09-02 14:51:22 -0400 |
| commit | d8a0affd207c813bd063fa2c27786f449eaf92b8 (patch) | |
| tree | 74a891c1c4706296903b401aa43f993661888dac | |
| parent | 063422c226e30c75a2562a2455643c5dabb03092 (diff) | |
| download | linux-next-d8a0affd207c813bd063fa2c27786f449eaf92b8.tar.gz linux-next-d8a0affd207c813bd063fa2c27786f449eaf92b8.zip | |
drm/amdgpu: restrict BAR0 fallback read to SR-IOV VFs only
The BAR0 fallback read path was introduced as a workaround for SR-IOV VFs
where the VRAM aperture is not available during early init. Restrict this
workaround to only SR-IOV VFs where it's needed.
Reported-by: gloveless@jqluv.com
Fixes: cba4928cdffa ("drm/amdgpu: reduce early full GPU access during SR-IOV init")
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patch.msgid.link/20260826185102.2269511-1-mario.limonciello@amd.com
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index ea25d5281559..2b01cbc063c3 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -776,6 +776,9 @@ static int amdgpu_device_read_fb_via_bar0(struct amdgpu_device *adev, if (!buf || !size) return -EINVAL; + if (!amdgpu_sriov_vf(adev)) + return -EINVAL; + flags = pci_resource_flags(adev->pdev, 0); if ((flags & IORESOURCE_UNSET) || !(flags & IORESOURCE_MEM)) return -EINVAL; |