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drm/amdgpu: Check if FB BAR is enabled for ROM read

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Some configurations don't have FB BAR enabled. Avoid reading ROM image
from FB BAR region in such cases.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Lijo Lazar
2021-03-02 16:28:43 +08:00
committed by Alex Deucher
parent a364782f49
commit f78313fae9
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_bios.c
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@ -97,6 +97,10 @@ static bool igp_read_bios_from_vram(struct amdgpu_device *adev)
if (amdgpu_device_need_post(adev))
return false;
/* FB BAR not enabled */
if (pci_resource_len(adev->pdev, 0) == 0)
return false;
adev->bios = NULL;
vram_base = pci_resource_start(adev->pdev, 0);
bios = ioremap_wc(vram_base, size);