Commit 8c778db9 authored by Ajay Kumar Gupta's avatar Ajay Kumar Gupta Committed by Felipe Balbi
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usb: musb: host: release dma channels if no active io 



Currently DMA channels are allocated and they remain allocated
even if there is no active data transfer. Added channel_release()
whenever there is no pending request.

Signed-off-by: default avatarAjay Kumar Gupta <ajay.gupta@ti.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent d7dbdb5e

drivers/usb/musb/musb_host.c

+12 −2
Original line number Diff line number Diff line
@@ -375,11 +375,21 @@ static void musb_advance_schedule(struct musb *musb, struct urb *urb, 
	 */

	if (list_empty(&qh->hep->urb_list)) {

		struct list_head	*head;

		struct dma_controller	*dma = musb->dma_controller;



		if (is_in)

		if (is_in) {

			ep->rx_reinit = 1;

		else

			if (ep->rx_channel) {

				dma->channel_release(ep->rx_channel);

				ep->rx_channel = NULL;

			}

		} else {

			ep->tx_reinit = 1;

			if (ep->tx_channel) {

				dma->channel_release(ep->tx_channel);

				ep->tx_channel = NULL;

			}

		}



		/* Clobber old pointers to this qh */

		musb_ep_set_qh(ep, is_in, NULL);