Thanks, Fixed as suggested and sent as v2. - Tong
On Sun, Mar 21, 2021 at 9:26 AM Christian König christian.koenig@amd.com wrote:
Am 20.03.21 um 21:10 schrieb Tong Zhang:
TTM_PL_VRAM may not initialized at all when calling radeon_bo_evict_vram(). We need to check before doing eviction.
[ 2.160837] BUG: kernel NULL pointer dereference, address: 0000000000000020 [ 2.161212] #PF: supervisor read access in kernel mode [ 2.161490] #PF: error_code(0x0000) - not-present page [ 2.161767] PGD 0 P4D 0 [ 2.163088] RIP: 0010:ttm_resource_manager_evict_all+0x70/0x1c0 [ttm] [ 2.168506] Call Trace: [ 2.168641] radeon_bo_evict_vram+0x1c/0x20 [radeon] [ 2.168936] radeon_device_fini+0x28/0xf9 [radeon] [ 2.169224] radeon_driver_unload_kms+0x44/0xa0 [radeon] [ 2.169534] radeon_driver_load_kms+0x174/0x210 [radeon] [ 2.169843] drm_dev_register+0xd9/0x1c0 [drm] [ 2.170104] radeon_pci_probe+0x117/0x1a0 [radeon]
Signed-off-by: Tong Zhang ztong0001@gmail.com
drivers/gpu/drm/radeon/radeon_object.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c index 9b81786782de..04e9a8118b0e 100644 --- a/drivers/gpu/drm/radeon/radeon_object.c +++ b/drivers/gpu/drm/radeon/radeon_object.c @@ -384,7 +384,9 @@ int radeon_bo_evict_vram(struct radeon_device *rdev) } #endif man = ttm_manager_type(bdev, TTM_PL_VRAM);
return ttm_resource_manager_evict_all(bdev, man);
if (man)return ttm_resource_manager_evict_all(bdev, man);return 0;You should probably code this the other way around, e.g.
If (!man) return 0; ...
Apart from that looks good to me.
Christian.
}
void radeon_bo_force_delete(struct radeon_device *rdev)