linux-kernel - [PATCH v2 2/4] leds: lm3532: Fixes for the driver for stability

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 13 Aug 2019 13:11:52 -0500
From:   Dan Murphy <dmurphy@...com>
To:     <jacek.anaszewski@...il.com>, <pavel@....cz>, <tony@...mide.com>,
        <sre@...nel.org>, <nekit1000@...il.com>, <mpartap@....net>,
        <merlijn@...zup.org>
CC:     <linux-leds@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Dan Murphy <dmurphy@...com>
Subject: [PATCH v2 2/4] leds: lm3532: Fixes for the driver for stability

Fixed misspelled words, added error check during probe
on the init of the registers, and fixed ALS/I2C control
mode.

Fixes: e37a7f8d77e1 ("leds: lm3532: Introduce the lm3532 LED driver")
Reported-by: Pavel Machek <pavel@....cz>
Signed-off-by: Dan Murphy <dmurphy@...com>
---

v2 - New patch due to separating out random fixes and brightness control
fix - https://lore.kernel.org/patchwork/patch/1109502/

 drivers/leds/leds-lm3532.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/leds/leds-lm3532.c b/drivers/leds/leds-lm3532.c
index b28b7f63198b..ef4c74cbcdc0 100644
--- a/drivers/leds/leds-lm3532.c
+++ b/drivers/leds/leds-lm3532.c
@@ -43,7 +43,7 @@
 #define LM3532_REG_ZONE_TRGT_C	0x7a
 #define LM3532_REG_MAX		0x7e
 
-/* Contorl Enable */
+/* Control Enable */
 #define LM3532_CTRL_A_ENABLE	BIT(0)
 #define LM3532_CTRL_B_ENABLE	BIT(1)
 #define LM3532_CTRL_C_ENABLE	BIT(2)
@@ -307,7 +307,7 @@ static int lm3532_led_disable(struct lm3532_led *led_data)
 	int ret;
 
 	ret = regmap_update_bits(led_data->priv->regmap, LM3532_REG_ENABLE,
-					 ctrl_en_val, ~ctrl_en_val);
+					 ctrl_en_val, 0);
 	if (ret) {
 		dev_err(led_data->priv->dev, "Failed to set ctrl:%d\n", ret);
 		return ret;
@@ -326,7 +326,7 @@ static int lm3532_brightness_set(struct led_classdev *led_cdev,
 
 	mutex_lock(&led->priv->lock);
 
-	if (led->mode == LM3532_BL_MODE_ALS) {
+	if (led->mode == LM3532_ALS_CTRL) {
 		if (brt_val > LED_OFF)
 			ret = lm3532_led_enable(led);
 		else
@@ -561,11 +561,14 @@ static int lm3532_parse_node(struct lm3532_data *priv)
 		}
 
 		if (led->mode == LM3532_BL_MODE_ALS) {
+			led->mode = LM3532_ALS_CTRL;
 			ret = lm3532_parse_als(priv);
 			if (ret)
 				dev_err(&priv->client->dev, "Failed to parse als\n");
 			else
 				lm3532_als_configure(priv, led);
+		} else {
+			led->mode = LM3532_I2C_CTRL;
 		}
 
 		led->num_leds = fwnode_property_count_u32(child, "led-sources");
@@ -606,7 +609,13 @@ static int lm3532_parse_node(struct lm3532_data *priv)
 			goto child_out;
 		}
 
-		lm3532_init_registers(led);
+		ret = lm3532_init_registers(led);
+		if (ret) {
+			dev_err(&priv->client->dev, "register init err: %d\n",
+				ret);
+			fwnode_handle_put(child);
+			goto child_out;
+		}
 
 		i++;
 	}
-- 
2.22.0.214.g8dca754b1e