linux-kernel - [PATCH] drm/amdgpu: Add missing pm_runtime_put

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1642507272-17545-1-git-send-email-lyz_cs@pku.edu.cn>
Date:   Tue, 18 Jan 2022 04:01:12 -0800
From:   Yongzhi Liu <lyz_cs@....edu.cn>
To:     airlied@...ux.ie, daniel@...ll.ch, nirmoy.das@....com,
        lijo.lazar@....com, Jingwen.Chen2@....com, evan.quan@....com,
        Jack.Zhang1@....com, kevin1.wang@....com, tom.stdenis@....com
Cc:     amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Yongzhi Liu <lyz_cs@....edu.cn>
Subject: [PATCH] drm/amdgpu: Add missing pm_runtime_put_autosuspend

pm_runtime_get_sync() increments the runtime PM usage counter even
when it returns an error code, thus a matching decrement is needed
on the error handling path to keep the counter balanced.

Signed-off-by: Yongzhi Liu <lyz_cs@....edu.cn>
---
 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 9aea1cc..4b950de 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -1120,8 +1120,10 @@ static ssize_t amdgpu_debugfs_gfxoff_read(struct file *f, char __user *buf,
 		return -EINVAL;
 
 	r = pm_runtime_get_sync(adev_to_drm(adev)->dev);
-	if (r < 0)
+	if (r < 0) {
+		pm_runtime_put_autosuspend(adev_to_drm(adev)->dev);
 		return r;
+	}
 
 	while (size) {
 		uint32_t value;
-- 
2.7.4