linux-kernel - [PATCH AUTOSEL 5.15 21/23] fbdev: fbcon: Destroy mutex on freeing struct fb

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Date:   Tue, 30 Aug 2022 13:21:38 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Shigeru Yoshida <syoshida@...hat.com>,
        Helge Deller <deller@....de>, Sasha Levin <sashal@...nel.org>,
        daniel@...ll.ch, tzimmermann@...e.de, sam@...nborg.org,
        javierm@...hat.com, wangqing@...o.com, linux-fbdev@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.15 21/23] fbdev: fbcon: Destroy mutex on freeing struct fb_info

From: Shigeru Yoshida <syoshida@...hat.com>

[ Upstream commit 58559dfc1ebba2ae0c7627dc8f8991ae1984c6e3 ]

It's needed to destroy bl_curve_mutex on freeing struct fb_info since
the mutex is embedded in the structure and initialized when it's
allocated.

Signed-off-by: Shigeru Yoshida <syoshida@...hat.com>
Signed-off-by: Helge Deller <deller@....de>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/video/fbdev/core/fbsysfs.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/video/fbdev/core/fbsysfs.c b/drivers/video/fbdev/core/fbsysfs.c
index ce699396d6bad..09ee27e7fc25f 100644
--- a/drivers/video/fbdev/core/fbsysfs.c
+++ b/drivers/video/fbdev/core/fbsysfs.c
@@ -84,6 +84,10 @@ void framebuffer_release(struct fb_info *info)
 	if (WARN_ON(refcount_read(&info->count)))
 		return;
 
+#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
+	mutex_destroy(&info->bl_curve_mutex);
+#endif
+
 	kfree(info->apertures);
 	kfree(info);
 }
-- 
2.35.1