From: Janne Kanniainen <janne.kanniainen@gmail.com>
Date: Thu, 3 Jul 2014 17:17:08 +0000 (-0700)
Subject: HID: gt683r: fix race condition
X-Git-Tag: firefly_0821_release~176^2~3451^2~8
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=c3883ae918c8754f7c251564d63211e1d5648b08;p=firefly-linux-kernel-4.4.55.git

HID: gt683r: fix race condition

This will fix race condition noticed by Oliver Neukum. Sysfs files are
created before mutex and work are initialized.

Signed-off-by: Janne Kanniainen <janne.kanniainen@gmail.com>
Reviewed-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
---

diff --git a/drivers/hid/hid-gt683r.c b/drivers/hid/hid-gt683r.c
index 077f7a19c9d5..073bd80ec839 100644
--- a/drivers/hid/hid-gt683r.c
+++ b/drivers/hid/hid-gt683r.c
@@ -227,6 +227,9 @@ static int gt683r_led_probe(struct hid_device *hdev,
 	if (!led)
 		return -ENOMEM;
 
+	mutex_init(&led->lock);
+	INIT_WORK(&led->work, gt683r_led_work);
+
 	led->mode = GT683R_LED_NORMAL;
 	led->hdev = hdev;
 	hid_set_drvdata(hdev, led);
@@ -271,9 +274,6 @@ static int gt683r_led_probe(struct hid_device *hdev,
 		goto fail;
 	}
 
-	mutex_init(&led->lock);
-	INIT_WORK(&led->work, gt683r_led_work);
-
 	return 0;
 
 fail: