[PATCH 5.10 322/406] fbdev/ep93xx-fb: Do not assign to struct fb_info.dev

Greg Kroah-Hartman
2023-09-17T19:38:36Z

From: Thomas Zimmermann <tzimmermann@suse.de>

commit f90a0e5265b60cdd3c77990e8105f79aa2fac994 upstream.

Do not assing the Linux device to struct fb_info.dev. The call to
register_framebuffer() initializes the field to the fbdev device.
Drivers should not override its value.

Fixes a bug where the driver incorrectly decreases the hardware
device's reference counter and leaks the fbdev device.

v2:
* add Fixes tag (Dan)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: 88017bda96a5 ("ep93xx video driver")
Cc: <stable@vger.kernel.org> # v2.6.32+
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230613110953.24176-15-tzimmermann@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/video/fbdev/ep93xx-fb.c | 1 -
1 file changed, 1 deletion(-)

--- a/drivers/video/fbdev/ep93xx-fb.c
+++ b/drivers/video/fbdev/ep93xx-fb.c
@@ -474,7 +474,6 @@ static int ep93xxfb_probe(struct platfor
if (!info)
return -ENOMEM;

- info->dev = &pdev->dev;
platform_set_drvdata(pdev, info);
fbi = info->par;
fbi->mach_info = mach_info;