From: jsg <jsg@openbsd.org>
Date: Mon, 9 Sep 2024 09:30:22 +0000 (+0000)
Subject: drm/amdgpu: Fix the warning division or modulo by zero
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=f926a68b5c7b450eb425177d879d399faf8535c2;p=openbsd

drm/amdgpu: Fix the warning division or modulo by zero

From Jesse Zhang
d116bb921e8b104f45d1f30a473ea99ef4262b9a in linux-6.6.y/6.6.50
1a00f2ac82d6bc6689388c7edcd2a4bd82664f3c in mainline linux
---

diff --git a/sys/dev/pci/drm/amd/amdgpu/aqua_vanjaram.c b/sys/dev/pci/drm/amd/amdgpu/aqua_vanjaram.c
index 0284c9198a0..6c6f9d9b5d8 100644
--- a/sys/dev/pci/drm/amd/amdgpu/aqua_vanjaram.c
+++ b/sys/dev/pci/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",