linux-kernel - [patch] hp_accel: Silence an uninitialized variable warning

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-next>] [day] [month] [year] [list]

Date:	Fri, 15 Apr 2016 17:47:20 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Eric Piel <eric.piel@...mplin-utc.net>
Cc:	Darren Hart <dvhart@...radead.org>,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] hp_accel: Silence an uninitialized variable warning

If acpi_evaluate_integer() fails then "lret" isn't initialized.  I've
tweaked the error handling to avoid this issue.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/platform/x86/hp_accel.c b/drivers/platform/x86/hp_accel.c
index 10ce6cb..746918e 100644
--- a/drivers/platform/x86/hp_accel.c
+++ b/drivers/platform/x86/hp_accel.c
@@ -127,8 +127,10 @@ static int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
 	arg0.integer.value = reg;
 
 	status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
+	if (ACPI_FAILURE(status))
+		return -EINVAL;
 	*ret = lret;
-	return (status != AE_OK) ? -EINVAL : 0;
+	return 0;
 }
 
 /**