rndis_host: Poll status before control channel where necessary

Some RNDIS devices don't respond on the control channel until polled
on the status channel.  In particular, this was reported to be the
case for the 2Wire HomePortal 1000SW and for some Windows Mobile
devices.

This is roughly based on a patch by John Carr <john.carr@unrouted.co.uk>
which is currently applied by Mandriva.

Reported-by: Mark Glassberg <vzeeaxwl@myfairpoint.net>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/usb/rndis_host.h b/include/linux/usb/rndis_host.h
index 05ef52861988..88fceb718c77 100644
--- a/include/linux/usb/rndis_host.h
+++ b/include/linux/usb/rndis_host.h
@@ -256,6 +256,8 @@ struct rndis_keepalive_c {	/* IN (optionally OUT) */
 #define FLAG_RNDIS_PHYM_NOT_WIRELESS    0x0001
 #define FLAG_RNDIS_PHYM_WIRELESS        0x0002
 
+/* Flags for driver_info::data */
+#define RNDIS_DRIVER_DATA_POLL_STATUS   1       /* poll status before control */
 
 extern void rndis_status(struct usbnet *dev, struct urb *urb);
 extern int