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/bpfc/Makefile

bpfc-libs =

bpfc-objs =	xmalloc.o \
		str.o \
		bpf.o \
		bpf_lexer.yy.o \
		bpf_parser.tab.o \
		die.o \
		sysctl.o \
		proc.o \
		cpp.o \
		bpfc.o

bpfc-lex =	bpf_lexer.yy.o

bpfc-yaac =	bpf_parser.tab.o

bpfc-eflags =	-I..

bpfc-confs =

bpfc_clean_custom:
	$(Q)$(call RM,$(BUILD_DIR)/*.h $(BUILD_DIR)/*.c)