From: Felipe Balbi <balbi@xxxxxx>
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@xxxxxx>
---
drivers/usb/dwc3/gadget.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 2ee6714..4d232c3 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
--
1.7.7
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