usb: gadget: net2280: unconditionally reset dma in usb_reset

If ep->dma is set, abort_dma() takes care of dma clean-up. If ep->dma
is not set, unconditionally reset dma channel.
Tested-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@intel.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/gadget/udc/net2280.c

@@ -1979,9 +1979,15 @@ static void usb_reset_338x(struct net2280 *dev)
 	/* clear old dma and irq state */
 	for (tmp = 0; tmp < 4; tmp++) {
 		struct net2280_ep *ep = &dev->ep[tmp + 1];
+		struct net2280_dma_regs __iomem *dma;
 
-		if (ep->dma)
+		if (ep->dma) {
 			abort_dma(ep);
+		} else {
+			dma = &dev->dma[tmp];
+			writel(BIT(DMA_ABORT), &dma->dmastat);
+			writel(0, &dma->dmactl);
+		}
 	}
 
 	writel(~0, &dev->regs->irqstat0), writel(~0, &dev->regs->irqstat1);