From: Jonathan McDowell <noodles@earth.li>
To: Giuseppe Cavallaro <peppe.cavallaro@st.com>,
Alexandre Torgue <alexandre.torgue@st.com>,
Jose Abreu <joabreu@synopsys.com>,
David Miller <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org,
linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH net 1/2] net: stmmac: dwmac1000: provide multicast filter fallback
Date: Wed, 12 Aug 2020 20:37:01 +0100 [thread overview]
Message-ID: <69708c8942a1f3717d15da861609344bd9a16bae.1597260787.git.noodles@earth.li> (raw)
In-Reply-To: <cover.1597260787.git.noodles@earth.li>
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@vger.kernel.org
Signed-off-by: Jonathan McDowell <noodles@earth.li>
---
drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
index efc6ec1b8027..fc8759f146c7 100644
--- 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 mac_device_info *hw,
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;
--
2.20.1
next prev parent reply other threads:[~2020-08-12 19:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-12 19:36 [PATCH net 0/2] net: stmmac: Fix multicast filter on IPQ806x Jonathan McDowell
2020-08-12 19:37 ` Jonathan McDowell [this message]
2020-08-12 19:37 ` [PATCH net 2/2] net: ethernet: stmmac: Disable hardware multicast filter Jonathan McDowell
2020-08-12 20:13 ` [PATCH net 0/2] net: stmmac: Fix multicast filter on IPQ806x David Miller
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