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authorDavid Brownell <david-b@pacbell.net>2007-04-29 10:09:47 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2007-05-22 23:45:48 -0700
commit4149b72eaa74583c361e3aaf5804eb74b72c51f1 (patch)
tree49191dc736116ff2e00686b3605ce7ea130da1cf /drivers/net/usb/cdc_ether.c
parent47f8468e6008a1d62f7dacbcff4ec3e115a500c8 (diff)
USB: handle more rndis_host oddities
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>
Diffstat (limited to 'drivers/net/usb/cdc_ether.c')
-rw-r--r--drivers/net/usb/cdc_ether.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/net/usb/cdc_ether.c b/drivers/net/usb/cdc_ether.c
index 5a21f06bf8a5..675ac99a79c6 100644
--- a/drivers/net/usb/cdc_ether.c
+++ b/drivers/net/usb/cdc_ether.c
@@ -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.
*/