From: David Francis <david.fran...@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.deuc...@amd.com>
Signed-off-by: David Francis <david.fran...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Sasha Levin <sas...@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;
--
2.40.1
