diff options
| author | Johan Hovold <johan@kernel.org> | 2017-01-30 11:26:38 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2017-01-31 12:59:32 +0100 |
| commit | 7a7b5df84b6b4e5d599c7289526eed96541a0654 (patch) | |
| tree | cf7514c7ddf4410fe37ca9099a2785e1cf08fa7d /drivers/usb/serial/ch341.c | |
| parent | 877a021e08ccb6434718c0cc781fdf943c884cc0 (diff) | |
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>
Diffstat (limited to 'drivers/usb/serial/ch341.c')