[PATCH 19/22] drm/amdgpu: Fix the warning division or modulo by zero for the variable num_xcc_per_xcp

[Jesse Zhang]

Dividing expression num_xcc_per_xcp which may be zero has undefined behavior.

Signed-off-by: Jesse Zhang <Jesse.Zhang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c b/drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c
index 414ea3f560a7..5752c6760992 100644
--- a/drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c
+++ b/drivers/gpu/drm/amd/amdgpu/aqua_vanjaram.c
@@ -522,6 +522,9 @@ static int aqua_vanjaram_switch_partition_mode(struct amdgpu_xcp_mgr *xcp_mgr,
 		goto unlock;
 
 	num_xcc_per_xcp = __aqua_vanjaram_get_xcc_per_xcp(xcp_mgr, mode);
+	if (!num_xcc_per_xcp)
+		goto unlock;
+
 	if (adev->gfx.funcs->switch_partition_mode)
 		adev->gfx.funcs->switch_partition_mode(xcp_mgr->adev,
 						       num_xcc_per_xcp);
-- 
2.25.1