2.6.27-stable review patch. If anyone has any objections, please let us know. ------------------ From: Takashi Iwai commit f3f80a9205da74fa56d613f4c14b88b6e4e6caa8 upstream. The snd-usb-caiaq driver causes Oops occasionally when accessing MIDI devices. This patch fixes the Oops and invalid URB submission errors as well. Signed-off-by: Takashi Iwai Signed-off-by: Greg Kroah-Hartman --- sound/usb/caiaq/caiaq-device.h | 1 + sound/usb/caiaq/caiaq-midi.c | 32 ++++++++++++++++++-------------- 2 files changed, 19 insertions(+), 14 deletions(-) --- 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]; --- a/sound/usb/caiaq/caiaq-midi.c +++ b/sound/usb/caiaq/caiaq-midi.c @@ -59,6 +59,11 @@ static int snd_usb_caiaq_midi_output_ope static int snd_usb_caiaq_midi_output_close(struct snd_rawmidi_substream *substream) { + struct snd_usb_caiaqdev *dev = substream->rmidi->private_data; + if (dev->midi_out_active) { + usb_kill_urb(&dev->midi_out_urb); + dev->midi_out_active = 0; + } return 0; } @@ -69,7 +74,8 @@ static void snd_usb_caiaq_midi_send(stru dev->midi_out_buf[0] = EP1_CMD_MIDI_WRITE; dev->midi_out_buf[1] = 0; /* port */ - len = snd_rawmidi_transmit_peek(substream, dev->midi_out_buf+3, EP1_BUFSIZE-3); + len = snd_rawmidi_transmit(substream, dev->midi_out_buf + 3, + EP1_BUFSIZE - 3); if (len <= 0) return; @@ -79,24 +85,24 @@ static void snd_usb_caiaq_midi_send(stru ret = usb_submit_urb(&dev->midi_out_urb, GFP_ATOMIC); if (ret < 0) - log("snd_usb_caiaq_midi_send(%p): usb_submit_urb() failed, %d\n", - substream, ret); + log("snd_usb_caiaq_midi_send(%p): usb_submit_urb() failed," + "ret=%d, len=%d\n", + substream, ret, len); + else + dev->midi_out_active = 1; } static void snd_usb_caiaq_midi_output_trigger(struct snd_rawmidi_substream *substream, int up) { struct snd_usb_caiaqdev *dev = substream->rmidi->private_data; - if (dev->midi_out_substream != NULL) - return; - - if (!up) { + if (up) { + dev->midi_out_substream = substream; + if (!dev->midi_out_active) + snd_usb_caiaq_midi_send(dev, substream); + } else { dev->midi_out_substream = NULL; - return; } - - dev->midi_out_substream = substream; - snd_usb_caiaq_midi_send(dev, substream); } @@ -161,16 +167,14 @@ int snd_usb_caiaq_midi_init(struct snd_u void snd_usb_caiaq_midi_output_done(struct urb* urb) { struct snd_usb_caiaqdev *dev = urb->context; - char *buf = urb->transfer_buffer; + dev->midi_out_active = 0; if (urb->status != 0) return; if (!dev->midi_out_substream) return; - snd_rawmidi_transmit_ack(dev->midi_out_substream, buf[2]); - dev->midi_out_substream = NULL; snd_usb_caiaq_midi_send(dev, dev->midi_out_substream); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/