From: Felix Kuehling <Felix.Kuehling@amd.com>
Date: Wed, 21 Nov 2018 01:52:37 +0000 (-0500)
Subject: drm/amdkfd: Add NULL-pointer check
X-Git-Tag: v5.4-rc1~1841^2~9^2~15
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3704d56e1a64bb0e951815f91149ae7bb726aa76;p=platform%2Fkernel%2Flinux-rpi.git

drm/amdkfd: Add NULL-pointer check

top_dev->gpu is NULL for CPUs. Avoid dereferencing it if NULL.

Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
index aa793fc..c5ed21e 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_topology.c
@@ -101,7 +101,7 @@ struct kfd_dev *kfd_device_by_pci_dev(const struct pci_dev *pdev)
 	down_read(&topology_lock);
 
 	list_for_each_entry(top_dev, &topology_device_list, list)
-		if (top_dev->gpu->pdev == pdev) {
+		if (top_dev->gpu && top_dev->gpu->pdev == pdev) {
 			device = top_dev->gpu;
 			break;
 		}