staging: most: hdm-usb: make use of is_channel_healthy flag

This patch makes the write completion handler use the is_channel_healthy
flag to prevent the hdm from scheduling a second clear_halt workqueue in
case an endpoint reported a STALL condition.

Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/most/hdm-usb/hdm_usb.c b/drivers/staging/most/hdm-usb/hdm_usb.c
index c2ba5a1..57d6c6d 100644 (file)
--- a/drivers/staging/most/hdm-usb/hdm_usb.c
+++ b/drivers/staging/most/hdm-usb/hdm_usb.c
@@ -418,6 +418,7 @@ static void hdm_write_completion(struct urb *urb)
                case -EPIPE:
                        dev_warn(dev, "Broken OUT pipe detected\n");
                        most_stop_enqueue(&mdev->iface, channel);
+                       mdev->is_channel_healthy[channel] = false;
                        mbo->status = MBO_E_INVAL;
                        mdev->clear_work[channel].pipe = urb->pipe;
                        schedule_work(&mdev->clear_work[channel].ws);
@@ -582,6 +583,7 @@ static void hdm_read_completion(struct urb *urb)
                case -EPIPE:
                        dev_warn(dev, "Broken IN pipe detected\n");
                        most_stop_enqueue(&mdev->iface, channel);
+                       mdev->is_channel_healthy[channel] = false;
                        mbo->status = MBO_E_INVAL;
                        mdev->clear_work[channel].pipe = urb->pipe;
                        schedule_work(&mdev->clear_work[channel].ws);
@@ -938,6 +940,7 @@ 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");
 
+       mdev->is_channel_healthy[channel] = true;
        most_resume_enqueue(&mdev->iface, channel);
        mutex_unlock(&mdev->io_mutex);
 }