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

[Sasha Levin]

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

[ Upstream commit 1a00f2ac82d6bc6689388c7edcd2a4bd82664f3c ]

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

Signed-off-by: Jesse Zhang <jesse.zh...@amd.com>
Suggested-by: Lijo Lazar <lijo.la...@amd.com>
Reviewed-by: Lijo Lazar <lijo.la...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Sasha Levin <sas...@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