diff options
Diffstat (limited to 'src/class')
| -rw-r--r-- | src/class/cdc/cdc_device.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/src/class/cdc/cdc_device.c b/src/class/cdc/cdc_device.c index cd8904042..317355ed7 100644 --- a/src/class/cdc/cdc_device.c +++ b/src/class/cdc/cdc_device.c @@ -77,15 +77,13 @@ static void _prep_out_transaction (uint8_t itf) { cdcd_interface_t* p_cdc = &_cdcd_itf[itf]; + // Prepare for incoming data but only allow what we can store in the ring buffer. + uint16_t const available = tu_fifo_remaining(&p_cdc->rx_ff); + TU_VERIFY( available >= sizeof(p_cdc->epout_buf), ); + // claim endpoint TU_VERIFY( usbd_edpt_claim(TUD_OPT_RHPORT, p_cdc->ep_out), ); - - // Prepare for incoming data but only allow what we can store in the ring buffer. - uint16_t max_read = tu_fifo_remaining(&p_cdc->rx_ff); - if ( max_read >= sizeof(p_cdc->epout_buf) ) - { - usbd_edpt_xfer(TUD_OPT_RHPORT, p_cdc->ep_out, p_cdc->epout_buf, sizeof(p_cdc->epout_buf)); - } + usbd_edpt_xfer(TUD_OPT_RHPORT, p_cdc->ep_out, p_cdc->epout_buf, sizeof(p_cdc->epout_buf)); } //--------------------------------------------------------------------+ |