From: Felipe Balbi <balbi@ti.com>
Date: Sat, 27 Aug 2011 12:10:09 +0000 (+0300)
Subject: usb: dwc3: gadget: set request dma to invalid when unmapping
X-Git-Tag: firefly_0821_release~3680^2~4327^2~148^2~39
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f198ead21bcb7b03d7bb2cba7ba0f5ad615a3862;p=firefly-linux-kernel-4.4.55.git

usb: dwc3: gadget: set request dma to invalid when unmapping

if we don't set DMA address to invalid when unmapping,
we might fall in a situation where request buffer
can't be mapped to DMA again.

Signed-off-by: Felipe Balbi <balbi@ti.com>
---

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 2ee6714bda4b..4d232c3646cc 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -83,6 +83,7 @@ void dwc3_unmap_buffer_from_dma(struct dwc3_request *req)
 				req->request.length, req->direction
 				? DMA_TO_DEVICE : DMA_FROM_DEVICE);
 		req->mapped = 0;
+		req->request.dma = DMA_ADDR_INVALID;
 	} else {
 		dma_sync_single_for_cpu(dwc->dev, req->request.dma,
 				req->request.length, req->direction