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/include/net/netns/unix.h

/*
 * Unix network namespace
 */
#ifndef __NETNS_UNIX_H__
#define __NETNS_UNIX_H__

struct ctl_table_header;
struct netns_unix {
	int			sysctl_max_dgram_qlen;
	struct ctl_table_header	*ctl;
};

#endif /* __NETNS_UNIX_H__ */