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Date: Tue, 8 Dec 2020 10:01:09 +0100 From: Rasmus Villemoes <rasmus.villemoes@...vas.dk> To: netdev@...r.kernel.org Cc: Andrew Lunn <andrew@...n.ch>, Vivien Didelot <vivien.didelot@...il.com>, Jakub Kicinski <kuba@...nel.org>, "David S. Miller" <davem@...emloft.net>, Vladimir Oltean <olteanv@...il.com>, Hubert Feurstein <h.feurstein@...il.com>, Rasmus Villemoes <rasmus.villemoes@...vas.dk> Subject: [PATCH net-next] net: dsa: mv88e6xxx: don't set non-existing learn2all bit for 6220/6250 The 6220 and 6250 switches do not have a learn2all bit in global1, ATU control register; bit 3 is reserved. On the switches that do have that bit, it is used to control whether learning frames are sent out the ports that have the message_port bit set. So rather than adding yet another chip method, use the existence of the ->port_setup_message_port method as a proxy for determining whether the learn2all bit exists (and should be set). Signed-off-by: Rasmus Villemoes <rasmus.villemoes@...vas.dk> --- This doesn't fix anything from what I can tell, in particular not the VLAN problems I'm having, so just tagging for net-next. But I do think it's worth it on the general principle of not poking around in undocumented/reserved bits. drivers/net/dsa/mv88e6xxx/chip.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c index 25449f634889..0245f3dfc1cd 100644 --- a/drivers/net/dsa/mv88e6xxx/chip.c +++ b/drivers/net/dsa/mv88e6xxx/chip.c @@ -1347,9 +1347,11 @@ static int mv88e6xxx_atu_setup(struct mv88e6xxx_chip *chip) if (err) return err; - err = mv88e6xxx_g1_atu_set_learn2all(chip, true); - if (err) - return err; + if (chip->info->ops->port_setup_message_port) { + err = mv88e6xxx_g1_atu_set_learn2all(chip, true); + if (err) + return err; + } return mv88e6xxx_g1_atu_set_age_time(chip, 300000); } -- 2.23.0
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