usbmon: Drop DMA mapping for setup packet

Setup packet must be visible in virtual space. There's absolutely no
good reason to implement any kind of zero-copy transfer of 8 bytes, and
the documentation in usb.h is explicit about it. So, drop DMA remapping.
Signed-off-by: NPete Zaitcev <zaitcev@redhat.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/mon/mon_bin.c

@@ -361,10 +361,6 @@ static inline char mon_bin_get_setup(unsigned char *setupb,
 	if (!usb_endpoint_xfer_control(&urb->ep->desc) || ev_type != 'S')
 		return '-';
 
-	if (urb->dev->bus->uses_dma &&
-	    (urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) {
-		return mon_dmapeek(setupb, urb->setup_dma, SETUP_LEN);
-	}
 	if (urb->setup_packet == NULL)
 		return 'Z';
 

drivers/usb/mon/mon_text.c

@@ -127,10 +127,6 @@ static inline char mon_text_get_setup(struct mon_event_text *ep,
 	if (ep->xfertype != USB_ENDPOINT_XFER_CONTROL || ev_type != 'S')
 		return '-';
 
-	if (urb->dev->bus->uses_dma &&
-	    (urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) {
-		return mon_dmapeek(ep->setup, urb->setup_dma, SETUP_MAX);
-	}
 	if (urb->setup_packet == NULL)
 		return 'Z';	/* '0' would be not as pretty. */