ALSA: usb-audio: Don't resubmit pending URBs at MIDI error recovery

[firefly-linux-kernel-4.4.55.git] / sound / usb / midi.c

diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index d3d49525a16bef649194ae410f64b72f243fc1f2..5bfb695547f832e22c8ad80042bf382292460e64 100644 (file)
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -365,6 +365,8 @@ static void snd_usbmidi_error_timer(unsigned long data)
                if (in && in->error_resubmit) {
                        in->error_resubmit = 0;
                        for (j = 0; j < INPUT_URBS; ++j) {
+                               if (atomic_read(&in->urbs[j]->use_count))
+                                       continue;
                                in->urbs[j]->dev = umidi->dev;
                                snd_usbmidi_submit_urb(in->urbs[j], GFP_ATOMIC);
                        }