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: Pete Zaitcev <zaitcev@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 0 insertions, 4 deletions

diff --git a/drivers/usb/mon/mon_bin.c b/drivers/usb/mon/mon_bin.c
index 5185e93dedef..3d6f03819ffd 100644
--- a/drivers/usb/mon/mon_bin.c
+++ b/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';