[PATCH 2/2] USB: usbdevfs: restore warning for nonsensical flags

[Oliver Neukum]

If we filter flags before they reach the core we need to generate our
own warnings.

Signed-off-by: Oliver Neukum <oneu...@suse.com>
Fixes: 0cb54a3e47cb ("USB: debugging code shouldn't alter control flow")
---
 drivers/usb/core/devio.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index 263dd2f309fb..244417d0dfd1 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1697,6 +1697,11 @@ static int proc_do_submiturb(struct usb_dev_state *ps, 
struct usbdevfs_urb *uurb
                u |= URB_NO_INTERRUPT;
        as->urb->transfer_flags = u;
 
+       if (!allow_short && uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
+               dev_warn(&ps->dev->dev, "Requested nonsensical 
USBDEVFS_URB_SHORT_NOT_OK.\n");
+       if (!allow_zero && uurb->flags & USBDEVFS_URB_ZERO_PACKET)
+               dev_warn(&ps->dev->dev, "Requested nonsensical 
USBDEVFS_URB_ZERO_PACKET.\n");
+
        as->urb->transfer_buffer_length = uurb->buffer_length;
        as->urb->setup_packet = (unsigned char *)dr;
        dr = NULL;
-- 
2.16.4