linux-kernel - [PATCH 7/7] backlight: atmel-pwm-bl: fix deferred probe from _

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Message-Id: <1379946452-25649-8-git-send-email-jhovold@gmail.com>
Date:	Mon, 23 Sep 2013 16:27:32 +0200
From:	Johan Hovold <jhovold@...il.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Grant Likely <grant.likely@...aro.org>,
	Mark Brown <broonie@...aro.org>, linux-kernel@...r.kernel.org,
	linux-mmc@...r.kernel.org, linux-mtd@...ts.infradead.org,
	linux-pcmcia@...ts.infradead.org, linux-usb@...r.kernel.org,
	linux-fbdev@...r.kernel.org, Johan Hovold <jhovold@...il.com>,
	Richard Purdie <rpurdie@...ys.net>,
	Jingoo Han <jg1.han@...sung.com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
Subject: [PATCH 7/7] backlight: atmel-pwm-bl: fix deferred probe from __init

Move probe out of __init section and don't use platform_driver_probe
which cannot be used with deferred probing.

Since commit e9354576 ("gpiolib: Defer failed gpio requests by default")
this driver might return -EPROBE_DEFER if a gpio_request fails.

Cc: Richard Purdie <rpurdie@...ys.net>
Cc: Jingoo Han <jg1.han@...sung.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
Signed-off-by: Johan Hovold <jhovold@...il.com>
---
 drivers/video/backlight/atmel-pwm-bl.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/video/backlight/atmel-pwm-bl.c b/drivers/video/backlight/atmel-pwm-bl.c
index 0393d82..f7447f7 100644
--- a/drivers/video/backlight/atmel-pwm-bl.c
+++ b/drivers/video/backlight/atmel-pwm-bl.c
@@ -118,7 +118,7 @@ static const struct backlight_ops atmel_pwm_bl_ops = {
 	.update_status  = atmel_pwm_bl_set_intensity,
 };
 
-static int __init atmel_pwm_bl_probe(struct platform_device *pdev)
+static int atmel_pwm_bl_probe(struct platform_device *pdev)
 {
 	struct backlight_properties props;
 	const struct atmel_pwm_bl_platform_data *pdata;
@@ -202,7 +202,7 @@ err_free_mem:
 	return retval;
 }
 
-static int __exit atmel_pwm_bl_remove(struct platform_device *pdev)
+static int atmel_pwm_bl_remove(struct platform_device *pdev)
 {
 	struct atmel_pwm_bl *pwmbl = platform_get_drvdata(pdev);
 
@@ -220,10 +220,11 @@ static struct platform_driver atmel_pwm_bl_driver = {
 		.name = "atmel-pwm-bl",
 	},
 	/* REVISIT add suspend() and resume() */
-	.remove = __exit_p(atmel_pwm_bl_remove),
+	.probe = atmel_pwm_bl_probe,
+	.remove = atmel_pwm_bl_remove,
 };
 
-module_platform_driver_probe(atmel_pwm_bl_driver, atmel_pwm_bl_probe);
+module_platform_driver(atmel_pwm_bl_driver);
 
 MODULE_AUTHOR("Hans-Christian egtvedt <hans-christian.egtvedt@...el.com>");
 MODULE_DESCRIPTION("Atmel PWM backlight driver");
-- 
1.8.3.2

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