Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm/amdgpu: Handle null atom context in VBIOS info ioctl
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>
authored by
David Francis
and committed by
Alex Deucher
86f2ec22
ffde7210
+11
-6
+11
-6
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+11
-6
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
···
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struct atom_context *atom_context;
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atom_context = adev->mode_info.atom_context;
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-
memcpy(vbios_info.name, atom_context->name, sizeof(atom_context->name));
955
-
memcpy(vbios_info.vbios_pn, atom_context->vbios_pn, sizeof(atom_context->vbios_pn));
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-
vbios_info.version = atom_context->version;
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memcpy(vbios_info.vbios_ver_str, atom_context->vbios_ver_str,
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sizeof(atom_context->vbios_ver_str));
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-
memcpy(vbios_info.date, atom_context->date, sizeof(atom_context->date));
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+
if (atom_context) {
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memcpy(vbios_info.name, atom_context->name,
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+
sizeof(atom_context->name));
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+
memcpy(vbios_info.vbios_pn, atom_context->vbios_pn,
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+
sizeof(atom_context->vbios_pn));
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vbios_info.version = atom_context->version;
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memcpy(vbios_info.vbios_ver_str, atom_context->vbios_ver_str,
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sizeof(atom_context->vbios_ver_str));
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+
memcpy(vbios_info.date, atom_context->date,
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+
sizeof(atom_context->date));
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+
}
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return copy_to_user(out, &vbios_info,
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min((size_t)size, sizeof(vbios_info))) ? -EFAULT : 0;