Some RNDIS devices include a bogus CDC Union descriptor pointing
to non-existing interfaces. The RNDIS code is already prepared
to handle devices without a CDC Union descriptor, so we can just
ignore it.
Cc: Markus Kolb <linux-201011@xxxxxxxxxxxx>
Cc: Iker Salmón San Millán <shaola@xxxxxxxxxxxx>
Cc: Jonathan Nieder <jrnieder@xxxxxxxxx>
Cc: Oliver Neukum <oliver@xxxxxxxxxxx>
Cc: 655387@xxxxxxxxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Bjørn Mork <bjorn@xxxxxxx>
---
How about this, which IMHO is less intrusive? Only build-tested, as I
don't have any of the failing devices, so it will obviously need
testing from anyone with such a device.
drivers/net/usb/cdc_ether.c | 10 +++++++++-
1 files changed, 9 insertions(+), 1 deletions(-)
diff --git a/drivers/net/usb/cdc_ether.c b/drivers/net/usb/cdc_ether.c
index 41a61ef..2109f34 100644
--- a/drivers/net/usb/cdc_ether.c
+++ b/drivers/net/usb/cdc_ether.c
@@ -195,7 +195,15 @@ int usbnet_generic_cdc_bind(struct usbnet *dev, struct usb_interface *intf)
info->control,
info->u->bSlaveInterface0,
info->data);
- goto bad_desc;
+ /* Fallback to guessing for rndis
+ * class devices with bogus union
+ * descriptor.
+ * Fixes some Samsung Android devices
+ */
+ if (rndis)
+ info->u = NULL;
+ else
+ goto bad_desc;
}
if (info->control != intf) {
dev_dbg(&intf->dev, "bogus CDC Union\n");
--
1.7.7.3
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