net: stmmac: Remove VLAN perfect matching dead code

Browse source

stmmac_vlan_update() falls back to "perfect matching" when the VLAN hash
filter is unavailable (!priv->dma_cap.vlhash). This fallback has been
unreachable in normal operation since its introduction in
commit c7ab0b8088 ("net: stmmac: Fallback to VLAN Perfect filtering if
HASH is not available") because the NETIF_F_HW_VLAN_{CTAG,STAG}_FILTER
features are advertised only when priv->dma_cap.vlhash is true.

The fallback is also duplicating the code in vlan_add_hw_rx_fltr(), which
is always available since stmmac_get_num_vlan() returns at least 1.

Therefore, remove it.

Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@renesas.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://patch.msgid.link/20260928203441.34876-2-ovidiu.panait.rb@renesas.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

...

This commit is contained in:

Ovidiu Panait 2026-09-28 20:34:37 +00:00 • committed by Jakub Kicinski

parent e3f33b0a1d

commit 11705541e7

3 changed files with 4 additions and 52 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

drivers/net/ethernet/stmicro/stmmac/hwif.h

View file

13

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

View file

41

drivers/net/ethernet/stmicro/stmmac/stmmac_vlan.c

View file