usb: gadget: udc: core: don't starve DMA resources

Always unmap all SG entries as required by DMA API Fixes: a698908 ("usb: gadget: add generic map/unmap request utilities") Cc: <stable@vger.kernel.org> # v3.4+ Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
mariux64 · Aug 25, 2016 · 23fd537 · 23fd537
1 parent 511a36d
commit 23fd537
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/usb/gadget/udc/core.c b/drivers/usb/gadget/udc/core.c
@@ -827,7 +827,7 @@ void usb_gadget_unmap_request_by_dev(struct device *dev,
 		return;
 
 	if (req->num_mapped_sgs) {
-		dma_unmap_sg(dev, req->sg, req->num_mapped_sgs,
+		dma_unmap_sg(dev, req->sg, req->num_sgs,
 				is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
 
 		req->num_mapped_sgs = 0;