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drm/amdgpu: Handle null atom context in VBIOS info ioctl

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On some APU systems, there is no atom context and so the
atom_context struct is null.

Add a check to the VBIOS_INFO branch of amdgpu_info_ioctl
to handle this case, returning all zeroes.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: David Francis <David.Francis@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
David Francis
2023-09-05 10:13:51 -04:00
committed by Alex Deucher
parent ffde72107b
commit 86f2ec2265
1 changed files with 11 additions and 6 deletions
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17
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
View File

@@ -951,12 +951,17 @@ int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
struct atom_context *atom_context;
atom_context = adev->mode_info.atom_context;
memcpy(vbios_info.name, atom_context->name, sizeof(atom_context->name));
memcpy(vbios_info.vbios_pn, atom_context->vbios_pn, sizeof(atom_context->vbios_pn));
vbios_info.version = atom_context->version;
memcpy(vbios_info.vbios_ver_str, atom_context->vbios_ver_str,
sizeof(atom_context->vbios_ver_str));
memcpy(vbios_info.date, atom_context->date, sizeof(atom_context->date));
if (atom_context) {
memcpy(vbios_info.name, atom_context->name,
sizeof(atom_context->name));
memcpy(vbios_info.vbios_pn, atom_context->vbios_pn,
sizeof(atom_context->vbios_pn));
vbios_info.version = atom_context->version;
memcpy(vbios_info.vbios_ver_str, atom_context->vbios_ver_str,
sizeof(atom_context->vbios_ver_str));
memcpy(vbios_info.date, atom_context->date,
sizeof(atom_context->date));
}
return copy_to_user(out, &vbios_info,
min((size_t)size, sizeof(vbios_info))) ? -EFAULT : 0;