usb: gadget: udc: core: Fix argument of dev_err() in usb_gadget_map_request()

BugLink: http://bugs.launchpad.net/bugs/1588945

commit 5096c4d3 upstream.

The argument of dev_err() in usb_gadget_map_request() should be dev
instead of &gadget->dev.

Fixes: 7ace8fc8 ("usb: gadget: udc: core: Fix argument of dma_map_single for IOMMU")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>

drivers/usb/gadget/udc/udc-core.c

@@ -71,7 +71,7 @@ int usb_gadget_map_request(struct usb_gadget *gadget,
 		mapped = dma_map_sg(dev, req->sg, req->num_sgs,
 				is_in ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
 		if (mapped == 0) {
-			dev_err(&gadget->dev, "failed to map SGs\n");
+			dev_err(dev, "failed to map SGs\n");
 			return -EFAULT;
 		}