From: "Christian König" <christian.koenig@xxxxxxx>
Date: 2020-04-21 19:22:49
To: Bernard Zhao <bernard@xxxxxxxx>,Alex Deucher <alexander.deucher@xxxxxxx>,"David (ChunMing) Zhou" <David1.Zhou@xxxxxxx>,David Airlie <airlied@xxxxxxxx>,Daniel Vetter <daniel@xxxxxxxx>,Tom St Denis <tom.stdenis@xxxxxxx>,Ori Messinger <Ori.Messinger@xxxxxxx>,Sam Ravnborg <sam@xxxxxxxxxxxx>,amd-gfx@xxxxxxxxxxxxxxxxxxxxx,dri-devel@xxxxxxxxxxxxxxxxxxxxx,linux-kernel@xxxxxxxxxxxxxxx
Cc: opensource.kernel@xxxxxxxx
Subject: Re: [PATCH] amdgpu: fixes memleak issue when init failed>Am 21.04.20 um 13:17 schrieb Bernard Zhao:
>> VRAM manager and DRM MM when init failed, there is no operaction
>> to free kzalloc memory & remove device file.
>> This will lead to memleak & cause stability issue.
>
>NAK, failure to create sysfs nodes are not critical.
>
>Christian.
>
OK, get it.
By the way, should i modify this patch to just handle <kfree(mgr)> in error branch, or that it is also unnecessary?
Regards,
Bernard
>>
>> Signed-off-by: Bernard Zhao <bernard@xxxxxxxx>
>> ---
>> drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 24 ++++++++++++++++----
>> 1 file changed, 19 insertions(+), 5 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>> index 82a3299e53c0..4c5fb153e6b4 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
>> @@ -175,30 +175,44 @@ static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_total);
>> if (ret) {
>> DRM_ERROR("Failed to create device file mem_info_vram_total\n");
>> - return ret;
>> + goto VRAM_TOTAL_FAIL;
>> }
>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
>> if (ret) {
>> DRM_ERROR("Failed to create device file mem_info_vis_vram_total\n");
>> - return ret;
>> + goto VIS_VRAM_TOTA_FAIL;
>> }
>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_used);
>> if (ret) {
>> DRM_ERROR("Failed to create device file mem_info_vram_used\n");
>> - return ret;
>> + goto VRAM_USED_FAIL;
>> }
>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
>> if (ret) {
>> DRM_ERROR("Failed to create device file mem_info_vis_vram_used\n");
>> - return ret;
>> + goto VIS_VRAM_USED_FAIL;
>> }
>> ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_vendor);
>> if (ret) {
>> DRM_ERROR("Failed to create device file mem_info_vram_vendor\n");
>> - return ret;
>> + goto VRAM_VERDOR_FAIL;
>> }
>>
>> return 0;
>> +
>> +VRAM_VERDOR_FAIL:
>> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
>> +VIS_VRAM_USED_FAIL:
>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_used);
>> +RVAM_USED_FAIL:
>> + device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
>> +VIS_VRAM_TOTA_FAIL:
>> + device_remove_file(adev->dev, &dev_attr_mem_info_vram_total);
>> +VRAM_TOTAL_FAIL:
>> + kfree(mgr);
>> + man->priv = NULL;
>> +
>> + return ret;
>> }
>>
>> /**
>
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