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| author | Nikita Zhandarovich <[email protected]> | 2023-05-19 15:33:27 +0000 |
|---|---|---|
| committer | Alex Deucher <[email protected]> | 2023-06-09 14:44:47 +0000 |
| commit | 1becc57cd1a905e2aa0e1eca60d2a37744525c4a (patch) | |
| tree | 0825c8f0fed3d269bd12b70890da51b2d36fddc9 /drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c | |
| parent | drm/radeon: stop including swiotlb.h (diff) | |
| download | kernel-1becc57cd1a905e2aa0e1eca60d2a37744525c4a.tar.gz kernel-1becc57cd1a905e2aa0e1eca60d2a37744525c4a.zip | |
drm/radeon: fix possible division-by-zero errors
Function rv740_get_decoded_reference_divider() may return 0 due to
unpredictable reference divider value calculated in
radeon_atom_get_clock_dividers(). This will lead to
division-by-zero error once that value is used as a divider
in calculating 'clk_s'.
While unlikely, this issue should nonetheless be prevented so add a
sanity check for such cases by testing 'decoded_ref' value against 0.
Found by Linux Verification Center (linuxtesting.org) with static
analysis tool SVACE.
v2: minor coding style fixes (Alex)
In practice this should actually happen as the vbios should be
properly populated.
Fixes: 66229b200598 ("drm/radeon/kms: add dpm support for rv7xx (v4)")
Signed-off-by: Nikita Zhandarovich <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c')
0 files changed, 0 insertions, 0 deletions