From: Yonghua Zheng <younghua.zheng@gmail.com>
Date: Mon, 26 Aug 2013 15:38:35 +0000 (+0800)
Subject: HID: hidraw: Add spinlock in struct hidraw to protect list
X-Git-Tag: v3.12-rc1~125^2~1^7~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=277fe44dd862412ee034470ad1c13a79d24e533b;p=pandora-kernel.git

HID: hidraw: Add spinlock in struct hidraw to protect list

It is unsafe to call list_for_each_entry in hidraw_report_event to
traverse each hidraw_list node without a lock protection, the list
could be modified if someone calls hidraw_release and list_del to
remove itself from the list, this can cause hidraw_report_event
to touch a deleted list struct and panic.

To prevent this, introduce a spinlock in struct hidraw to protect
list from concurrent access.

Signed-off-by: Yonghua Zheng <younghua.zheng@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---

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