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clean up

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This commit is contained in:
hathach 2020-09-09 16:29:45 +07:00
parent 33f0a18523
commit fe1b5dfa23
1 changed files with 3 additions and 4 deletions
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7
src/class/cdc/cdc_device.c
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@ -164,11 +164,10 @@ uint32_t tud_cdc_n_write_flush (uint8_t itf)
uint8_t const rhport = TUD_OPT_RHPORT; uint8_t const rhport = TUD_OPT_RHPORT;
// claim the endpoint first // Claim the endpoint first
TU_VERIFY( usbd_edpt_claim(rhport, p_cdc->ep_in), 0 ); TU_VnERIFY( usbd_edpt_claim(rhport, p_cdc->ep_in), 0 );
// we can be blocked by another write()/write_flush() from other thread. // Pull data from FIFO
// causing us to attempt to transfer on an busy endpoint.
uint16_t const count = tu_fifo_read_n(&p_cdc->tx_ff, p_cdc->epin_buf, sizeof(p_cdc->epin_buf)); uint16_t const count = tu_fifo_read_n(&p_cdc->tx_ff, p_cdc->epin_buf, sizeof(p_cdc->epin_buf));
if ( count && tud_cdc_n_connected(itf) ) if ( count && tud_cdc_n_connected(itf) )