sfc: Check firmware supports Ethernet PTP filter

[ Upstream commit c4413a20fa6d7c4888009fb7dd391685f196cd36 ]

Not all firmware variants support RSS filters. Do not fail all PTP
functionality when raw ethernet PTP filters fail to insert.

Fixes: e4616f64726b ("sfc: support PTP over Ethernet")
Signed-off-by: Alex Austin <alex.austin@amd.com>
Acked-by: Edward Cree <ecree.xilinx@gmail.com>
Reviewed-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@amd.com>
Link: https://lore.kernel.org/r/20230824164657.42379-1-alex.austin@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/ethernet/sfc/ptp.c b/drivers/net/ethernet/sfc/ptp.c
index eaef4a15008a3e3bef67270c0658de9fd0c7b0a3..692c7f132e9f90e4d9cae49d22d759646ea0c564 100644 (file)
--- a/drivers/net/ethernet/sfc/ptp.c
+++ b/drivers/net/ethernet/sfc/ptp.c
@@ -1387,7 +1387,8 @@ static int efx_ptp_insert_multicast_filters(struct efx_nic *efx)
                        goto fail;
 
                rc = efx_ptp_insert_eth_filter(efx);
-               if (rc < 0)
+               /* Not all firmware variants support this filter */
+               if (rc < 0 && rc != -EPROTONOSUPPORT)
                        goto fail;
        }