From: David Brownell Date: Fri, 20 Mar 2009 08:08:20 +0000 (-0700) Subject: USB: gadget: fix rndis regression X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=090b90118207e786d2990310d063fda5d52cce6e;p=deliverable%2Flinux.git USB: gadget: fix rndis regression Restore some code that was wrongly dropped from the RNDIS driver, and caused interop problems observed with OpenMoko. The issue is with hardware which needs help conforming to part of the USB 2.0 spec (section 8.5.3.2); some can automagically send a ZLP in response to an unexpected IN, but not all chips will do that. We don't need to check the packet length ourselves the way earlier code did, since the UDC must already check it. But we do need to tell the UDC when it must force a short packet termination of the data stage. (Based on a patch from Aric D. Blumer ) Signed-off-by: David Brownell Cc: stable Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/gadget/f_rndis.c b/drivers/usb/gadget/f_rndis.c index 3a8bb53fc473..fd7b356f902d 100644 --- a/drivers/usb/gadget/f_rndis.c +++ b/drivers/usb/gadget/f_rndis.c @@ -437,7 +437,7 @@ invalid: DBG(cdev, "rndis req%02x.%02x v%04x i%04x l%d\n", ctrl->bRequestType, ctrl->bRequest, w_value, w_index, w_length); - req->zero = 0; + req->zero = (value < w_length); req->length = value; value = usb_ep_queue(cdev->gadget->ep0, req, GFP_ATOMIC); if (value < 0)