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| author | Lech Perczak <lech.perczak@gmail.com> | 2022-04-13 04:44:16 +0300 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2022-04-14 16:08:12 +0300 |
| commit | 171cfae6b78c3b73d8cd3d405a63e38f15f363f2 (patch) | |
| tree | 5718718ae3dd8cfaf28fd56d09b23f86fd343751 /drivers/net/usb/rndis_host.c | |
| parent | 36e747972d8b4c09e6e3275e31a3acba46e2c4d2 (diff) | |
| download | linux-171cfae6b78c3b73d8cd3d405a63e38f15f363f2.tar.xz | |
rndis_host: limit scope of bogus MAC address detection to ZTE devices
Reporting of bogus MAC addresses and ignoring configuration of new
destination address wasn't observed outside of a range of ZTE devices,
among which this seems to be the common bug. Align rndis_host driver
with implementation found in cdc_ether, which also limits this workaround
to ZTE devices.
Suggested-by: Bjørn Mork <bjorn@mork.no>
Cc: Kristian Evensen <kristian.evensen@gmail.com>
Cc: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Lech Perczak <lech.perczak@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'drivers/net/usb/rndis_host.c')
| -rw-r--r-- | drivers/net/usb/rndis_host.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/net/usb/rndis_host.c b/drivers/net/usb/rndis_host.c index 7a9ece2de2c5..4e70dec30e5a 100644 --- a/drivers/net/usb/rndis_host.c +++ b/drivers/net/usb/rndis_host.c @@ -418,10 +418,7 @@ generic_rndis_bind(struct usbnet *dev, struct usb_interface *intf, int flags) goto halt_fail_and_release; } - if (bp[0] & 0x02) - eth_hw_addr_random(net); - else - eth_hw_addr_set(net, bp); + eth_hw_addr_set(net, bp); /* set a nonzero filter to enable data transfers */ memset(u.set, 0, sizeof *u.set); @@ -463,6 +460,16 @@ static int rndis_bind(struct usbnet *dev, struct usb_interface *intf) return generic_rndis_bind(dev, intf, FLAG_RNDIS_PHYM_NOT_WIRELESS); } +static int zte_rndis_bind(struct usbnet *dev, struct usb_interface *intf) +{ + int status = rndis_bind(dev, intf); + + if (!status && (dev->net->dev_addr[0] & 0x02)) + eth_hw_addr_random(dev->net); + + return status; +} + void rndis_unbind(struct usbnet *dev, struct usb_interface *intf) { struct rndis_halt *halt; @@ -615,7 +622,7 @@ static const struct driver_info zte_rndis_info = { .description = "ZTE RNDIS device", .flags = FLAG_ETHER | FLAG_POINTTOPOINT | FLAG_FRAMING_RN | FLAG_NO_SETINT, .data = RNDIS_DRIVER_DATA_DST_MAC_FIXUP, - .bind = rndis_bind, + .bind = zte_rndis_bind, .unbind = rndis_unbind, .status = rndis_status, .rx_fixup = rndis_rx_fixup, |