HID: cp2112: fix sleep-while-atomic

A recent commit fixing DMA-buffers on stack added a shared transfer
buffer protected by a spinlock. This is broken as the USB HID request
callbacks can sleep. Fix this up by replacing the spinlock with a mutex.

Fixes: 1ffb3c40ffb5 ("HID: cp2112: make transfer buffers DMA capable")
Cc: stable <stable@vger.kernel.org>	# 4.9
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

path: root/net/ieee802154/sysfs.h

#ifndef __IEEE802154_SYSFS_H
#define __IEEE802154_SYSFS_H

int wpan_phy_sysfs_init(void);
void wpan_phy_sysfs_exit(void);

extern struct class wpan_phy_class;

#endif /* __IEEE802154_SYSFS_H */