6.5-stable review patch. If anyone has any objections, please let me know.
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From: David Francis David.Francis@amd.com
[ Upstream commit 5e7e82254270c8cf8b107451c5de01cee2f135ae ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c index f678bdd5f353d..b9fc7e2db5e59 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c @@ -940,12 +940,17 @@ 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;