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drivers: usb: udc_dwc2: Notify upper layer on failed TX

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Change ensures that `dwc2_handle_xfer_next` would notify upper layer if
`dwc2_tx_fifo_write` fails. This is necessary to ensure that upper layer
is aware of the failed TX for the submitted transfer. It also ensures
that the submitted transfer is removed from the TX queue.

Signed-off-by: Marek Pieta <Marek.Pieta@nordicsemi.no>
Signed-off-by: Kamil Piszczek <Kamil.Piszczek@nordicsemi.no>
This commit is contained in:
Marek Pieta 2024-08-27 23:16:06 +02:00 • committed by Carles Cufí
commit 8b50d3768f
1 changed files with 12 additions and 3 deletions
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15
drivers/usb/udc/udc_dwc2.c
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@ -639,9 +639,18 @@ static void dwc2_handle_xfer_next(const struct device *dev,
if (USB_EP_DIR_IS_OUT(cfg->addr)) {
dwc2_prep_rx(dev, buf, cfg);
} else {
if (dwc2_tx_fifo_write(dev, cfg, buf)) {
LOG_ERR("Failed to start write to TX FIFO, ep 0x%02x",
cfg->addr);
int err = dwc2_tx_fifo_write(dev, cfg, buf);
if (err) {
LOG_ERR("Failed to start write to TX FIFO, ep 0x%02x (err: %d)",
cfg->addr, err);
buf = udc_buf_get(dev, cfg->addr);
if (udc_submit_ep_event(dev, buf, -ECONNREFUSED)) {
LOG_ERR("Failed to submit endpoint event");
};
return;
}
}