Commit 729e6574 authored Nov 16, 2016 by Razmik Karapetyan Committed by Felipe Balbi Nov 18, 2016

usb: dwc2: Don't program DMA address for 0 length request



Check the request length in dwc2_hsotg_start_req() function. If
length == 0, do not write DMA address to control register.

Signed-off-by: Razmik Karapetyan <razmik@synopsys.com>
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>

parent 9d8da857

drivers/usb/dwc2/gadget.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1018,7 +1018,7 @@ static void dwc2_hsotg_start_req(struct dwc2_hsotg *hsotg,
		/* write size / packets */
		dwc2_writel(epsize, hsotg->regs + epsize_reg);

		if (using_dma(hsotg) && !continuing) {
		if (using_dma(hsotg) && !continuing && (length != 0)) {
		/*
		* write DMA address to control register, buffer
		* already synced by dwc2_hsotg_ep_queue().