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drm/amdgpu: fix mc_data out-of-bounds read warning

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[ Upstream commit 51dfc0a4d6 ]

Clear warning that read mc_data[i-1] may out-of-bounds.

Signed-off-by: Tim Huang <Tim.Huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Tim Huang 2024-05-06 16:30:01 +08:00 committed by Greg Kroah-Hartman
parent f2b7a9f383
commit d0a43bf367
1 changed files with 2 additions and 0 deletions
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drivers/gpu/drm/amd/amdgpu/amdgpu_atombios.c
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@ -1476,6 +1476,8 @@ int amdgpu_atombios_init_mc_reg_table(struct amdgpu_device *adev,
(u32)le32_to_cpu(*((u32 *)reg_data + j));
j++;
} else if ((reg_table->mc_reg_address[i].pre_reg_data & LOW_NIBBLE_MASK) == DATA_EQU_PREV) {
if (i == 0)
continue;
reg_table->mc_reg_table_entry[num_ranges].mc_data[i] =
reg_table->mc_reg_table_entry[num_ranges].mc_data[i - 1];
}