pm_runtime_get_sync will increment pm usage counter even it failed. Forgetting to putting operation will result in reference leak here. Fix it by replacing it with pm_runtime_resume_and_get to keep usage counter balanced.
Reported-by: Hulk Robot hulkci@huawei.com Signed-off-by: Yu Kuai yukuai3@huawei.com --- drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c index bcaf271b39bf..eb7f9d20dad7 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c @@ -1058,7 +1058,7 @@ static ssize_t amdgpu_debugfs_gfxoff_read(struct file *f, char __user *buf, if (size & 0x3 || *pos & 0x3) return -EINVAL;
- r = pm_runtime_get_sync(adev_to_drm(adev)->dev); + r = pm_runtime_resume_and_get(adev_to_drm(adev)->dev); if (r < 0) return r;
[AMD Official Use Only]
thanks Kuai. But code below matches the other code block in this file.
r = pm_runtime_get_sync(dev->dev); if (r < 0) { pm_runtime_put_autosuspend(dev->dev); return r; }
________________________________________ 发件人: Yu Kuai yukuai3@huawei.com 发送时间: 2021年5月17日 16:16 收件人: Deucher, Alexander; Koenig, Christian; Pan, Xinhui; airlied@linux.ie; daniel@ffwll.ch 抄送: amd-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org; linux-kernel@vger.kernel.org; yukuai3@huawei.com; yi.zhang@huawei.com 主题: [PATCH] drm/amdgpu: fix PM reference leak in amdgpu_debugfs_gfxoff_rea()
pm_runtime_get_sync will increment pm usage counter even it failed. Forgetting to putting operation will result in reference leak here. Fix it by replacing it with pm_runtime_resume_and_get to keep usage counter balanced.
Reported-by: Hulk Robot hulkci@huawei.com Signed-off-by: Yu Kuai yukuai3@huawei.com --- drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c index bcaf271b39bf..eb7f9d20dad7 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c @@ -1058,7 +1058,7 @@ static ssize_t amdgpu_debugfs_gfxoff_read(struct file *f, char __user *buf, if (size & 0x3 || *pos & 0x3) return -EINVAL;
- r = pm_runtime_get_sync(adev_to_drm(adev)->dev); + r = pm_runtime_resume_and_get(adev_to_drm(adev)->dev); if (r < 0) return r;
-- 2.25.4
dri-devel@lists.freedesktop.org
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Pan, Xinhui -
Yu Kuai