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USB: handle more rndis_host oddities

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Workaround another device firmware bug, wherein CDC descriptors get
placed in a wrong place never previously observed in the wild.

Fix a bug where a seeming RNDIS device returns a bogus response during
device initialization.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Brownell 2007-04-29 10:09:47 -07:00 committed by Greg Kroah-Hartman
parent 47f8468e60
commit 4149b72eaa
2 changed files with 17 additions and 0 deletions
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16
drivers/net/usb/cdc_ether.c
View File

@ -91,6 +91,22 @@ int usbnet_generic_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
"CDC descriptors on config\n");
}
/* Maybe CDC descriptors are after the endpoint? This bug has
* been seen on some 2Wire Inc RNDIS-ish products.
*/
if (len == 0) {
struct usb_host_endpoint *hep;
hep = intf->cur_altsetting->endpoint;
if (hep) {
buf = hep->extra;
len = hep->extralen;
}
if (len)
dev_dbg(&intf->dev,
"CDC descriptors on endpoint\n");
}
/* this assumes that if there's a non-RNDIS vendor variant
* of cdc-acm, it'll fail RNDIS requests cleanly.
*/

1
drivers/net/usb/rndis_host.c
View File

@ -515,6 +515,7 @@ static int rndis_bind(struct usbnet *dev, struct usb_interface *intf)
dev_err(&intf->dev,
"dev can't take %u byte packets (max %u)\n",
dev->hard_mtu, tmp);
retval = -EINVAL;
goto fail_and_release;
}