From: Ben Hutchings <ben@decadent.org.uk>
Date: Sat, 3 Jul 2010 04:47:54 +0000 (-0700)
Subject: net: Revert "rndis_host: Poll status channel before control channel"
X-Git-Tag: v2.6.35-rc5~14^2~19
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7b00ac51ffcda994ef0839001257be894cc6e5a8;p=pandora-kernel.git

net: Revert "rndis_host: Poll status channel before control channel"

This reverts commit c17b274dc2aa538b68c1f02b01a3c4e124b435ba.

That change was reported to break rndis_wlan support for the WUSB54GS.

Reported-by: Luís Picciochi Oliveira <pitxyoki@gmail.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c
index 28d3ee175e7b..dd8a4adf48ca 100644
--- a/drivers/net/usb/rndis_host.c
+++ b/drivers/net/usb/rndis_host.c
@@ -104,10 +104,8 @@ static void rndis_msg_indicate(struct usbnet *dev, struct rndis_indicate *msg,
 int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf, int buflen)
 {
 	struct cdc_state	*info = (void *) &dev->data;
-	struct usb_cdc_notification notification;
 	int			master_ifnum;
 	int			retval;
-	int			partial;
 	unsigned		count;
 	__le32			rsp;
 	u32			xid = 0, msg_len, request_id;
@@ -135,17 +133,13 @@ int rndis_command(struct usbnet *dev, struct rndis_msg_hdr *buf, int buflen)
 	if (unlikely(retval < 0 || xid == 0))
 		return retval;
 
-	/* Some devices don't respond on the control channel until
-	 * polled on the status channel, so do that first. */
-	retval = usb_interrupt_msg(
-		dev->udev,
-		usb_rcvintpipe(dev->udev, dev->status->desc.bEndpointAddress),
-		&notification, sizeof(notification), &partial,
-		RNDIS_CONTROL_TIMEOUT_MS);
-	if (unlikely(retval < 0))
-		return retval;
+	// FIXME Seems like some devices discard responses when
+	// we time out and cancel our "get response" requests...
+	// so, this is fragile.  Probably need to poll for status.
 
-	/* Poll the control channel; the request probably completed immediately */
+	/* ignore status endpoint, just poll the control channel;
+	 * the request probably completed immediately
+	 */
 	rsp = buf->msg_type | RNDIS_MSG_COMPLETION;
 	for (count = 0; count < 10; count++) {
 		memset(buf, 0, CONTROL_BUFFER_SIZE);