This is a note to let you know that I've just added the patch titled
net: stmmac: dwmac1000: provide multicast filter fallback
to the 5.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-stmmac-dwmac1000-provide-multicast-filter-fallback.patch
and it can be found in the queue-5.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 592d751c1e174df5ff219946908b005eb48934b3 Mon Sep 17 00:00:00 2001
From: Jonathan McDowell <noodles@xxxxxxxx>
Date: Wed, 12 Aug 2020 20:37:01 +0100
Subject: net: stmmac: dwmac1000: provide multicast filter fallback
From: Jonathan McDowell <noodles@xxxxxxxx>
commit 592d751c1e174df5ff219946908b005eb48934b3 upstream.
If we don't have a hardware multicast filter available then instead of
silently failing to listen for the requested ethernet broadcast
addresses fall back to receiving all multicast packets, in a similar
fashion to other drivers with no multicast filter.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Jonathan McDowell <noodles@xxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
@@ -164,6 +164,9 @@ static void dwmac1000_set_filter(struct
value = GMAC_FRAME_FILTER_PR | GMAC_FRAME_FILTER_PCF;
} else if (dev->flags & IFF_ALLMULTI) {
value = GMAC_FRAME_FILTER_PM; /* pass all multi */
+ } else if (!netdev_mc_empty(dev) && (mcbitslog2 == 0)) {
+ /* Fall back to all multicast if we've no filter */
+ value = GMAC_FRAME_FILTER_PM;
} else if (!netdev_mc_empty(dev)) {
struct netdev_hw_addr *ha;
Patches currently in stable-queue which might be from noodles@xxxxxxxx are
queue-5.8/net-ethernet-stmmac-disable-hardware-multicast-filter.patch
queue-5.8/net-stmmac-dwmac1000-provide-multicast-filter-fallback.patch
