Commit ba3a1a91 authored Oct 04, 2019 by Cristian Birsan Committed by Felipe Balbi Oct 27, 2019

usb: gadget: udc: atmel: Fix interrupt storm in FIFO mode.



Fix interrupt storm generated by endpoints when working in FIFO mode.
The TX_COMPLETE interrupt is used only by control endpoints processing.
Do not enable it for other types of endpoints.

Fixes: 914a3f3b ("USB: add atmel_usba_udc driver")
Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

parent e92f30ac

drivers/usb/gadget/udc/atmel_usba_udc.c

+4 −2

Original line number	Diff line number	Diff line
		@@ -449,8 +449,10 @@ static void submit_request(struct usba_ep ep, struct usba_request req)
		next_fifo_transaction(ep, req);
		if (req->last_transaction) {
		usba_ep_writel(ep, CTL_DIS, USBA_TX_PK_RDY);
		if (ep_is_control(ep))
		usba_ep_writel(ep, CTL_ENB, USBA_TX_COMPLETE);
		} else {
		if (ep_is_control(ep))
		usba_ep_writel(ep, CTL_DIS, USBA_TX_COMPLETE);
		usba_ep_writel(ep, CTL_ENB, USBA_TX_PK_RDY);
		}