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From:   Thomas Zimmermann <tzimmermann@suse.de>
To:     daniel@ffwll.ch, javierm@redhat.com, sam@ravnborg.org,
        deller@gmx.de, geert+renesas@glider.be, lee@kernel.org,
        daniel.thompson@linaro.org, jingoohan1@gmail.com,
        dan.carpenter@linaro.org, michael.j.ruhl@intel.com
Cc:     linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org,
        linux-sh@vger.kernel.org, linux-omap@vger.kernel.org,
        linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org,
        Thomas Zimmermann <tzimmermann@suse.de>,
        Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>,
        Yoshinori Sato <ysato@users.sourceforge.jp>,
        Rich Felker <dalias@libc.org>,
        John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
        stable@vger.kernel.org
Subject: [PATCH v3 05/38] backlight/lv5207lp: Compare against struct fb_info.device
Date:   Tue, 13 Jun 2023 13:06:40 +0200
Message-ID: <20230613110953.24176-6-tzimmermann@suse.de>
In-Reply-To: <20230613110953.24176-1-tzimmermann@suse.de>
References: <20230613110953.24176-1-tzimmermann@suse.de>
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Struct lv5207lp_platform_data refers to a platform device within
the Linux device hierarchy. The test in lv5207lp_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: 82e5c40d88f9 ("backlight: Add Sanyo LV5207LP backlight driver")
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Lee Jones <lee@kernel.org>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: linux-sh@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v3.12+
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
---
 drivers/video/backlight/lv5207lp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/backlight/lv5207lp.c b/drivers/video/backlight/lv5207lp.c
index 00673c8b66ac5..99ba4bc0a500d 100644
--- a/drivers/video/backlight/lv5207lp.c
+++ b/drivers/video/backlight/lv5207lp.c
@@ -67,7 +67,7 @@ static int lv5207lp_backlight_check_fb(struct backlight_device *backlight,
 {
 	struct lv5207lp *lv = bl_get_data(backlight);
 
-	return lv->pdata->fbdev == NULL || lv->pdata->fbdev == info->dev;
+	return lv->pdata->fbdev == NULL || lv->pdata->fbdev == info->device;
 }
 
 static const struct backlight_ops lv5207lp_backlight_ops = {
-- 
2.41.0