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Merge pull request #20987 from benpicco/backport/2024.10/stdio-cdc-acm-miss

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sys/usb_cdc_acm_stdio: only submit and flush for non-empty buffer [backport 2024.10]
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Marian Buschsieweke 2024-11-18 15:34:14 +00:00 committed by GitHub
commit a54faa777b
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1 changed files with 2 additions and 2 deletions
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sys/usb/usbus/cdc/acm/cdc_acm_stdio.c
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@ -37,13 +37,13 @@ static uint8_t _cdc_tx_buf_mem[CONFIG_USBUS_CDC_ACM_STDIO_BUF_SIZE];
static ssize_t _write(const void* buffer, size_t len) static ssize_t _write(const void* buffer, size_t len)
{ {
const char *start = buffer; const char *start = buffer;
do { while (len) {
size_t n = usbus_cdc_acm_submit(&cdcacm, buffer, len); size_t n = usbus_cdc_acm_submit(&cdcacm, buffer, len);
usbus_cdc_acm_flush(&cdcacm); usbus_cdc_acm_flush(&cdcacm);
/* Use tsrb and flush */ /* Use tsrb and flush */
buffer = (char *)buffer + n; buffer = (char *)buffer + n;
len -= n; len -= n;
} while (len); }
return (char *)buffer - start; return (char *)buffer - start;
} }