From: Yu Kuai <yukuai3@huawei.com>
To: <alexander.deucher@amd.com>, <christian.koenig@amd.com>,
<Xinhui.Pan@amd.com>, <airlied@linux.ie>, <daniel@ffwll.ch>
Cc: <amd-gfx@lists.freedesktop.org>,
<dri-devel@lists.freedesktop.org>, <linux-kernel@vger.kernel.org>,
<yukuai3@huawei.com>, <yi.zhang@huawei.com>
Subject: [PATCH] drm/amdgpu: fix PM reference leak in amdgpu_debugfs_gfxoff_rea()
Date: Mon, 17 May 2021 16:16:32 +0800 [thread overview]
Message-ID: <20210517081632.1563569-1-yukuai3@huawei.com> (raw)
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
next reply other threads:[~2021-05-17 8:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-17 8:16 Yu Kuai [this message]
2021-05-17 8:22 ` 回复: [PATCH] drm/amdgpu: fix PM reference leak in amdgpu_debugfs_gfxoff_rea() Pan, Xinhui
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