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drm/amdgpu: validate XCP topology counts before division

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In aqua_vanjaram_get_xcp_res_info(), max_res[i] can be zero.
When res_lt_xcp is true the code divides num_xcp by max_res[i],
causing a divide fault.

Skip the loop body for absent resources.

v2: Remove redundant checks (Lijo)

Signed-off-by: Asad Kamal <asad.kamal@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Asad Kamal 2026-06-16 21:24:05 +08:00 committed by Alex Deucher
parent b68f165492
commit 0eda57ee30
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c
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@ -273,8 +273,10 @@ static int aqua_vanjaram_get_xcp_res_info(struct amdgpu_xcp_mgr *xcp_mgr,
xcp_cfg->num_res = ARRAY_SIZE(max_res);
for (i = 0; i < xcp_cfg->num_res; i++) {
res_lt_xcp = max_res[i] < num_xcp;
xcp_cfg->xcp_res[i].id = i;
if (!max_res[i])
continue;
res_lt_xcp = max_res[i] < num_xcp;
xcp_cfg->xcp_res[i].num_inst =
res_lt_xcp ? 1 : max_res[i] / num_xcp;
xcp_cfg->xcp_res[i].num_inst =