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/vlan.h

#ifndef VLAN_H
#define VLAN_H

#include <stdbool.h>
#include <inttypes.h>

static inline uint16_t vlan_tci2prio(uint16_t tci)
{
	return (tci & 0xe000) >> 13;
}

static inline uint16_t vlan_tci2cfi(uint16_t tci)
{
	return (tci & 0x1000) >> 12;
}

static inline uint16_t vlan_tci2vid(uint16_t tci)
{
	return tci & 0x0fff;
}

#endif