From: Vladimir Oltean <olteanv@gmail.com>
To: Gilles DOFFE <gilles.doffe@savoirfairelinux.com>
Cc: netdev@vger.kernel.org, Woojung Huh <woojung.huh@microchip.com>,
UNGLinuxDriver@microchip.com, Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH net 4/6] net: dsa: ksz: do not change tagging on del
Date: Thu, 14 Jan 2021 02:15:06 +0200 [thread overview]
Message-ID: <20210114001506.d2hg6b6evju3iyl6@skbuf> (raw)
In-Reply-To: <c3effba30b2ae979a4b7990bbf6096ca26e3de7a.1610540603.git.gilles.doffe@savoirfairelinux.com>
On Wed, Jan 13, 2021 at 01:45:20PM +0100, Gilles DOFFE wrote:
> If a VLAN is removed, the tagging policy should not be changed as
> still active VLANs could be impacted.
>
> Signed-off-by: Gilles DOFFE <gilles.doffe@savoirfairelinux.com>
> ---
> drivers/net/dsa/microchip/ksz8795.c | 3 ---
> 1 file changed, 3 deletions(-)
>
> diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
> index 193f03ef9160..b55fb2761993 100644
> --- a/drivers/net/dsa/microchip/ksz8795.c
> +++ b/drivers/net/dsa/microchip/ksz8795.c
> @@ -880,7 +880,6 @@ static void ksz8795_port_vlan_add(struct dsa_switch *ds, int port,
> static int ksz8795_port_vlan_del(struct dsa_switch *ds, int port,
> const struct switchdev_obj_port_vlan *vlan)
> {
> - bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
> struct ksz_device *dev = ds->priv;
> u16 data, vid, pvid, new_pvid = 0;
> u8 fid, member, valid;
> @@ -888,8 +887,6 @@ static int ksz8795_port_vlan_del(struct dsa_switch *ds, int port,
> ksz_pread16(dev, port, REG_PORT_CTRL_VID, &pvid);
> pvid = pvid & 0xFFF;
>
> - ksz_port_cfg(dev, port, P_TAG_CTRL, PORT_REMOVE_TAG, untagged);
> -
> for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++) {
> ksz8795_r_vlan_table(dev, vid, &data);
> ksz8795_from_vlan(data, &fid, &member, &valid);
> --
> 2.25.1
>
What do you mean the tagging policy "should not be changed". Nothing is
changed, the write to PORT_REMOVE_TAG is identical to the one done on
.port_vlan_add. If anything, the egress untagging policy is reinforced
on delete, not changed...
What's the actual problem (beside for the fact that the driver is
obviously a lot more broken than you can fix through patches to "net")?
next prev parent reply other threads:[~2021-01-14 0:28 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-13 12:45 [PATCH net 0/6] Fixes on Microchip KSZ8795 DSA switch driver Gilles DOFFE
2021-01-13 12:45 ` [PATCH net 1/6] net: dsa: ksz: fix FID management Gilles DOFFE
2021-01-13 14:01 ` Gilles Doffe
2021-01-13 23:26 ` Vladimir Oltean
2021-01-13 12:45 ` [PATCH net 2/6] net: dsa: ksz: move tag/untag action Gilles DOFFE
2021-01-13 23:35 ` Florian Fainelli
2021-01-14 0:00 ` Vladimir Oltean
2021-01-13 12:45 ` [PATCH net 3/6] net: dsa: ksz: insert tag on ks8795 ingress packets Gilles DOFFE
2021-01-13 23:41 ` Florian Fainelli
2021-01-14 0:10 ` Vladimir Oltean
2021-01-13 12:45 ` [PATCH net 4/6] net: dsa: ksz: do not change tagging on del Gilles DOFFE
2021-01-13 23:48 ` Florian Fainelli
2021-01-14 0:15 ` Vladimir Oltean [this message]
2021-01-13 12:45 ` [PATCH net 5/6] net: dsa: ksz: fix wrong pvid Gilles DOFFE
2021-01-13 17:23 ` Florian Fainelli
2021-01-13 23:54 ` Vladimir Oltean
2021-01-13 12:45 ` [PATCH net 6/6] net: dsa: ksz: fix wrong read cast to u64 Gilles DOFFE
2021-01-13 23:39 ` Vladimir Oltean
2021-01-14 0:26 ` [PATCH net 0/6] Fixes on Microchip KSZ8795 DSA switch driver Vladimir Oltean
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