ALSA: caiaq - Fix Oops with MIDI

The snd-usb-caiaq driver causes Oops occasionally when accessing MIDI
devices.  This patch fixes the Oops and invalid URB submission errors
as well.

Cc: stable@kernel.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/sound/usb/caiaq/caiaq-device.h b/sound/usb/caiaq/caiaq-device.h
index f9fbdbae269d..ab56e738c5fc 100644
--- a/sound/usb/caiaq/caiaq-device.h
+++ b/sound/usb/caiaq/caiaq-device.h
@@ -75,6 +75,7 @@ struct snd_usb_caiaqdev {
         wait_queue_head_t ep1_wait_queue;
         wait_queue_head_t prepare_wait_queue;
         int spec_received, audio_parm_answer;
+        int midi_out_active;
 
         char vendor_name[CAIAQ_USB_STR_LEN];
         char product_name[CAIAQ_USB_STR_LEN];