linux-kernel - [PATCH v2 5/7] leds: gpio: fix and simplify reading property "label"

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>] [day] [month] [year] [list]

Date:   Wed, 14 Sep 2016 20:55:18 +0200
From:   Heiner Kallweit <hkallweit1@...il.com>
To:     Jacek Anaszewski <j.anaszewski@...sung.com>
Cc:     "linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 5/7] leds: gpio: fix and simplify reading property "label"

Checking for the presence of the property first isn't strictly needed
as we can react on the return code of fwnode_property_read_string.
Also, even if the presence of a property "label" was checked,
reading a string value for it theoretically still can fail and
this case isn't handled.

Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
---
v2:
- rebased due to removal of patch 2 of the original series
---
 drivers/leds/leds-gpio.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index 171ba2f..00a24e3 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -181,16 +181,14 @@ static struct gpio_leds_priv *gpio_leds_create(struct platform_device *pdev)
 			goto err;
 		}
 
-		if (fwnode_property_present(child, "label")) {
-			fwnode_property_read_string(child, "label", &led.name);
-		} else {
-			if (IS_ENABLED(CONFIG_OF) && !led.name && np)
-				led.name = np->name;
-			if (!led.name) {
-				ret = -EINVAL;
-				goto err;
-			}
+		ret = fwnode_property_read_string(child, "label", &led.name);
+		if (ret && IS_ENABLED(CONFIG_OF) && np)
+			led.name = np->name;
+		if (!led.name) {
+			ret = -EINVAL;
+			goto err;
 		}
+
 		fwnode_property_read_string(child, "linux,default-trigger",
 					    &led.default_trigger);
 
-- 
2.9.2