[PATCH AUTOSEL 6.6 31/83] drm/amdgpu: Fix the warning division or modulo by zero

Sasha Levin
2024-08-01T00:23:44Z

From: Jesse Zhang <jesse.zhang@amd.com>

[ Upstream commit 1a00f2ac82d6bc6689388c7edcd2a4bd82664f3c ]

Checks the partition mode and returns an error for an invalid mode.

Signed-off-by: Jesse Zhang <Jesse.Zhang@amd.com>
Suggested-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c b/drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c
index 0284c9198a04a..6c6f9d9b5d897 100644
--- a/drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c
+++ b/drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c
@@ -500,6 +500,12 @@ static int aqua_vanjaram_switch_partition_mode(struct amdgpu_xcp_mgr *xcp_mgr,

if (mode == AMDGPU_AUTO_COMPUTE_PARTITION_MODE) {
mode = __aqua_vanjaram_get_auto_mode(xcp_mgr);
+ if (mode == AMDGPU_UNKNOWN_COMPUTE_PARTITION_MODE) {
+ dev_err(adev->dev,
+ "Invalid config, no compatible compute partition mode found, available memory partitions: %d",
+ adev->gmc.num_mem_partitions);
+ return -EINVAL;
+ }
} else if (!__aqua_vanjaram_is_valid_mode(xcp_mgr, mode)) {
dev_err(adev->dev,
"Invalid compute partition mode requested, requested: %s, available memory partitions: %d",
--
2.43.0