[net,0/2] net: stmmac: Fix multicast filter on IPQ806x

Message

Jonathan McDowell Aug. 12, 2020, 7:36 p.m. UTC

This pair of patches are the result of discovering a failure to
correctly receive IPv6 multicast packets on such a device (in particular
DHCPv6 requests and RA solicitations). Putting the device into
promiscuous mode, or allmulti, both resulted in such packets correctly
being received. Examination of the vendor driver (nss-gmac from the
qsdk) shows that it does not enable the multicast filter and instead
falls back to allmulti.

Extend the base dwmac1000 driver to fall back when there's no suitable
hardware filter, and update the ipq806x platform to request this.

Jonathan McDowell (2):
  net: stmmac: dwmac1000: provide multicast filter fallback
  net: ethernet: stmmac: Disable hardware multicast filter

 drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c  | 1 +
 drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c | 3 +++
 2 files changed, 4 insertions(+)

Comments

David Miller Aug. 12, 2020, 8:13 p.m. UTC | #1

From: Jonathan McDowell <[e-mail]>
Date: Wed, 12 Aug 2020 20:36:54 +0100

> This pair of patches are the result of discovering a failure to
> correctly receive IPv6 multicast packets on such a device (in particular
> DHCPv6 requests and RA solicitations). Putting the device into
> promiscuous mode, or allmulti, both resulted in such packets correctly
> being received. Examination of the vendor driver (nss-gmac from the
> qsdk) shows that it does not enable the multicast filter and instead
> falls back to allmulti.
> 
> Extend the base dwmac1000 driver to fall back when there's no suitable
> hardware filter, and update the ipq806x platform to request this.

Series applied, thank you.