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Upstream sync #425

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Merged
VIXIVIXIV merged 1 commit into from
Mar 25, 2026
Merged

Upstream sync #425

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3 changes: 2 additions & 1 deletion src/stm32/usbotg.c
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Original file line number Diff line number Diff line change
Expand Up @@ -242,7 +242,8 @@ usb_send_bulk_in(void *data, uint_fast8_t len)
usb_irq_enable();
return len;
}
if (ctl & USB_OTG_DIEPCTL_EPENA) {
int dbuf_busy = CONFIG_STM32_USB_DOUBLE_BUFFER_TX && TX_BUF.len;
if (ctl & USB_OTG_DIEPCTL_EPENA || dbuf_busy) {
if (!CONFIG_STM32_USB_DOUBLE_BUFFER_TX || TX_BUF.len || !len) {
// Wait for space to transmit
OTGD->DAINTMSK |= 1 << USB_CDC_EP_BULK_IN;
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