linux-kernel - [PATCH v3 01/38] backlight/bd6107: Compare against struct fb

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Message-ID: <20230613110953.24176-2-tzimmermann@suse.de>
Date:   Tue, 13 Jun 2023 13:06:36 +0200
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     daniel@...ll.ch, javierm@...hat.com, sam@...nborg.org,
        deller@....de, geert+renesas@...der.be, lee@...nel.org,
        daniel.thompson@...aro.org, jingoohan1@...il.com,
        dan.carpenter@...aro.org, michael.j.ruhl@...el.com
Cc:     linux-fbdev@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-sh@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        stable@...r.kernel.org
Subject: [PATCH v3 01/38] backlight/bd6107: Compare against struct fb_info.device

Struct bd6107_platform_data refers to a platform device within
the Linux device hierarchy. The test in bd6107_backlight_check_fb()
compares it against the fbdev device in struct fb_info.dev, which
is different. Fix the test by comparing to struct fb_info.device.

Fixes a bug in the backlight driver and prepares fbdev for making
struct fb_info.dev optional.

v2:
	* move renames into separate patch (Javier, Sam, Michael)

Fixes: 67b43e590415 ("backlight: Add ROHM BD6107 backlight driver")
Signed-off-by: Thomas Zimmermann <tzimmermann@...e.de>
Cc: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
Cc: Lee Jones <lee@...nel.org>
Cc: Daniel Thompson <daniel.thompson@...aro.org>
Cc: Jingoo Han <jingoohan1@...il.com>
Cc: dri-devel@...ts.freedesktop.org
Cc: <stable@...r.kernel.org> # v3.12+
Reviewed-by: Javier Martinez Canillas <javierm@...hat.com>
Reviewed-by: Sam Ravnborg <sam@...nborg.org>
Reviewed-by: Daniel Thompson <daniel.thompson@...aro.org>
---
 drivers/video/backlight/bd6107.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/backlight/bd6107.c b/drivers/video/backlight/bd6107.c
index f4db6c064635b..e3410444ea235 100644
--- a/drivers/video/backlight/bd6107.c
+++ b/drivers/video/backlight/bd6107.c
@@ -104,7 +104,7 @@ static int bd6107_backlight_check_fb(struct backlight_device *backlight,
 {
 	struct bd6107 *bd = bl_get_data(backlight);
 
-	return bd->pdata->fbdev == NULL || bd->pdata->fbdev == info->dev;
+	return bd->pdata->fbdev == NULL || bd->pdata->fbdev == info->device;
 }
 
 static const struct backlight_ops bd6107_backlight_ops = {
-- 
2.41.0