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authorChunming Zhou <David1.Zhou@amd.com>2017-05-11 18:22:17 +0800
committerAlex Deucher <alexander.deucher@amd.com>2017-05-24 16:49:09 -0400
commit7c4378f4523d4af05b5941ea906e7032631eb753 (patch)
tree3144ae64bdaec125ab44e78d294c44dfb32248b8 /drivers
parent3d18e33735a02b1a90aecf14410bf3edbfd4d3dc (diff)
downloadlinux-7c4378f4523d4af05b5941ea906e7032631eb753.tar.bz2
drm/amdgpu: fix NULL pointer panic of emit_gds_switch
[ 338.384770] BUG: unable to handle kernel NULL pointer dereference at (null) [ 338.384817] IP: [< (null)>] (null) [ 338.385505] RIP: 0010:[<0000000000000000>] [< (null)>] (null) [ 338.385950] Call Trace: [ 338.385993] [<ffffffffa05d2313>] ? amdgpu_vm_flush+0x283/0x400 [amdgpu] [ 338.386025] [<ffffffff811818d3>] ? printk+0x4d/0x4f [ 338.386074] [<ffffffffa05d4906>] amdgpu_ib_schedule+0x4a6/0x4d0 [amdgpu] [ 338.386140] [<ffffffffa0673e54>] amdgpu_job_run+0x64/0x180 [amdgpu] [ 338.386203] [<ffffffffa0672e09>] amd_sched_main+0x2e9/0x4a0 [amdgpu] [ 338.386232] [<ffffffff810bfce0>] ? prepare_to_wait_event+0x110/0x110 [ 338.386295] [<ffffffffa0672b20>] ? amd_sched_select_entity+0xe0/0xe0 [amdgpu] [ 338.386327] [<ffffffff8109b423>] kthread+0xd3/0xf0 [ 338.386349] [<ffffffff8109b350>] ? kthread_park+0x60/0x60 [ 338.386376] [<ffffffff817e1ee5>] ret_from_fork+0x25/0x30 [ 338.386401] Code: Bad RIP value. [ 338.386420] RIP [< (null)>] (null) [ 338.386443] RSP <ffffc90001bd7d40> [ 338.386458] CR2: 0000000000000000 [ 338.398508] ---[ end trace 4c66fcdc74b9a0a2 ]--- Signed-off-by: Chunming Zhou <David1.Zhou@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 1bf36c3542c1..8ecf82c5fe74 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -634,7 +634,7 @@ int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job)
mutex_unlock(&id_mgr->lock);
}
- if (gds_switch_needed) {
+ if (ring->funcs->emit_gds_switch && gds_switch_needed) {
id->gds_base = job->gds_base;
id->gds_size = job->gds_size;
id->gws_base = job->gws_base;