From: Daniel Mack <daniel@zonque.org>
Date: Fri, 13 Sep 2019 18:07:49 +0000 (+0200)
Subject: drivers: leds: tlc591xx: check error during device init
X-Git-Tag: v5.5-rc1~98^2~23
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=b46d2b4d3d8166ab51f491a2801e2cbed2e8a7aa;p=linux.git

drivers: leds: tlc591xx: check error during device init

The driver currently ignores errors from register writes at probe time.
It will hence register an LED class device no matter whether the
pyhsical device is present or not.

To fix this, make the device probe fail in case regmap operations
return an error.

Signed-off-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Pavel Machek <pavel@ucw.cz>
---

diff --git a/drivers/leds/leds-tlc591xx.c b/drivers/leds/leds-tlc591xx.c
index 59ff088c7d75..00702824d27c 100644
--- a/drivers/leds/leds-tlc591xx.c
+++ b/drivers/leds/leds-tlc591xx.c
@@ -147,7 +147,10 @@ tlc591xx_configure(struct device *dev,
 	unsigned int i;
 	int err = 0;
 
-	tlc591xx_set_mode(priv->regmap, MODE2_DIM);
+	err = tlc591xx_set_mode(priv->regmap, MODE2_DIM);
+	if (err < 0)
+		return err;
+
 	for (i = 0; i < TLC591XX_MAX_LEDS; i++) {
 		struct tlc591xx_led *led = &priv->leds[i];