Re: [PATCH 1/2] drm/amdgpu/debugfs: fix memory leak when pm_runtime_get_sync failed

[Christian KÃnig]

Am 16.06.20 um 08:30 schrieb Chen Tao:
> Fix memory leak in amdgpu_debugfs_gpr_read not freeing data when
> pm_runtime_get_sync failed.
>
> Fixes: a9ffe2a983383 ("drm/amdgpu/debugfs: properly handle runtime pm")
> Signed-off-by: Chen Tao <chentao107@xxxxxxxxxx>

Probably better to remove the duplication of result and r here and then 
use "goto err".

Regards,
Christian

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> index 1a4894fa3693..bea8c36a53a4 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
> @@ -862,8 +862,10 @@ static ssize_t amdgpu_debugfs_gpr_read(struct file *f, char __user *buf,
>   		return -ENOMEM;
>   
>   	r = pm_runtime_get_sync(adev->ddev->dev);
> -	if (r < 0)
> +	if (r < 0) {
> +		kfree(data);
>   		return r;
> +	}
>   
>   	r = amdgpu_virt_enable_access_debugfs(adev);
>   	if (r < 0)