diff options
| -rw-r--r-- | drivers/staging/most/usb/usb.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/staging/most/usb/usb.c b/drivers/staging/most/usb/usb.c index 87e7fec2af8a..1169635454f3 100644 --- a/drivers/staging/most/usb/usb.c +++ b/drivers/staging/most/usb/usb.c @@ -809,6 +809,21 @@ static void wq_clear_halt(struct work_struct *wq_obj) if (usb_clear_halt(mdev->usb_device, pipe)) dev_warn(&mdev->usb_device->dev, "Failed to reset endpoint.\n"); + /* If the functional Stall condition has been set on an + * asynchronous rx channel, we need to clear the tx channel + * too, since the hardware runs its clean-up sequence on both + * channels, as they are physically one on the network. + * + * The USB interface that exposes the asynchronous channels + * contains always two endpoints, and two only. + */ + if (mdev->conf[channel].data_type == MOST_CH_ASYNC && + mdev->conf[channel].direction == MOST_CH_RX) { + int peer = 1 - channel; + int snd_pipe = usb_sndbulkpipe(mdev->usb_device, + mdev->ep_address[peer]); + usb_clear_halt(mdev->usb_device, snd_pipe); + } mdev->is_channel_healthy[channel] = true; most_resume_enqueue(&mdev->iface, channel); mutex_unlock(&mdev->io_mutex); |