From: Arnd Bergmann <arnd@arndb.de>
Date: Sun, 11 Jul 2010 13:34:05 +0000 (+0200)
Subject: HID: hiddev: use usb_find_interface, get rid of BKL
X-Git-Tag: v2.6.36-rc1~567^2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bd25f4dd6972755579d0ea50d1a5ace2e9b00d1a;p=pandora-kernel.git

HID: hiddev: use usb_find_interface, get rid of BKL

This removes the private hiddev_table in the usbhid
driver and changes it to use usb_find_interface
instead.

The advantage is that we can avoid the race between
usb_register_dev and usb_open and no longer need the
big kernel lock.

This doesn't introduce race condition -- the intf pointer could be
invalidated only in hiddev_disconnect() through usb_deregister_dev(),
but that will block on minor_rwsem and not actually remove the device
until usb_open().

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Jiri Kosina <jkosina@suse.cz>
Cc: "Greg Kroah-Hartman" <gregkh@suse.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---

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