[PATCH 1/2] drm/amdgpu: Fix kernel NULL pointer dereference when amdgpu fini
Rex Zhu
Rex.Zhu at amd.com
Tue Mar 20 08:37:10 UTC 2018
Change-Id: Ibef63da7a4725651065fd316385c8521ec31897b
Signed-off-by: Rex Zhu <Rex.Zhu at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 ++-
drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 5bb88aa..f105116 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1493,7 +1493,8 @@ static int amdgpu_device_ip_fini(struct amdgpu_device *adev)
continue;
if (adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_UVD &&
- adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_VCE) {
+ adev->ip_blocks[i].version->type != AMD_IP_BLOCK_TYPE_VCE &&
+ adev->ip_blocks[i].version->funcs->set_clockgating_state) {
/* ungate blocks before hw fini so that we can shutdown the blocks safely */
r = adev->ip_blocks[i].version->funcs->set_clockgating_state((void *)adev,
AMD_CG_STATE_UNGATE);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
index 11dfe57..3a5ca46 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
@@ -259,6 +259,7 @@ void amdgpu_irq_fini(struct amdgpu_device *adev)
}
}
kfree(adev->irq.client[i].sources);
+ adev->irq.client[i].sources = NULL;
}
}
--
1.9.1
More information about the amd-gfx
mailing list