[PATCH] net: stmmac: remove the limitation of adding vlan in promisc mode

[PATCH] net: stmmac: remove the limitation of adding vlan in promisc mode

[Clark Wang]

When using brctl to add eqos to a bridge, it will frist set eqos to
promisc mode and then set a VLAN for this bridge with a filer VID value
of 1.

These two error returns limit the use of brctl, resulting in the
inability of the bridge to be enabled on eqos. So remove them.

Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
index 8c7a0b7c9952..64bbe15a699e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
@@ -472,12 +472,6 @@ static int dwmac4_add_hw_vlan_rx_fltr(struct net_device *dev,
 	if (vid > 4095)
 		return -EINVAL;
 
-	if (hw->promisc) {
-		netdev_err(dev,
-			   "Adding VLAN in promisc mode not supported\n");
-		return -EPERM;
-	}
-
 	/* Single Rx VLAN Filter */
 	if (hw->num_vlan == 1) {
 		/* For single VLAN filter, VID 0 means VLAN promiscuous */
@@ -527,12 +521,6 @@ static int dwmac4_del_hw_vlan_rx_fltr(struct net_device *dev,
 {
 	int i, ret = 0;
 
-	if (hw->promisc) {
-		netdev_err(dev,
-			   "Deleting VLAN in promisc mode not supported\n");
-		return -EPERM;
-	}
-
 	/* Single Rx VLAN Filter */
 	if (hw->num_vlan == 1) {
 		if ((hw->vlan_filter[0] & GMAC_VLAN_TAG_VID) == vid) {
-- 
2.34.1


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Re: [Linux-stm32] [PATCH] net: stmmac: remove the limitation of adding vlan in promisc mode

[Ahmad Fatoum]

Hello Clark,

On 03.04.23 10:17, Clark Wang wrote:
> When using brctl to add eqos to a bridge, it will frist set eqos to
> promisc mode and then set a VLAN for this bridge with a filer VID value
> of 1.
> 
> These two error returns limit the use of brctl, resulting in the
> inability of the bridge to be enabled on eqos. So remove them.
> 
> Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>

Please add a suitable Fixes: tag pointing at the commit introducing
the regression.

Thanks,
Ahmad

> ---
>  drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c | 12 ------------
>  1 file changed, 12 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
> index 8c7a0b7c9952..64bbe15a699e 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
> @@ -472,12 +472,6 @@ static int dwmac4_add_hw_vlan_rx_fltr(struct net_device *dev,
>  	if (vid > 4095)
>  		return -EINVAL;
>  
> -	if (hw->promisc) {
> -		netdev_err(dev,
> -			   "Adding VLAN in promisc mode not supported\n");
> -		return -EPERM;
> -	}
> -
>  	/* Single Rx VLAN Filter */
>  	if (hw->num_vlan == 1) {
>  		/* For single VLAN filter, VID 0 means VLAN promiscuous */
> @@ -527,12 +521,6 @@ static int dwmac4_del_hw_vlan_rx_fltr(struct net_device *dev,
>  {
>  	int i, ret = 0;
>  
> -	if (hw->promisc) {
> -		netdev_err(dev,
> -			   "Deleting VLAN in promisc mode not supported\n");
> -		return -EPERM;
> -	}
> -
>  	/* Single Rx VLAN Filter */
>  	if (hw->num_vlan == 1) {
>  		if ((hw->vlan_filter[0] & GMAC_VLAN_TAG_VID) == vid) {

-- 
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RE: [Linux-stm32] [PATCH] net: stmmac: remove the limitation of adding vlan in promisc mode

[Clark Wang]

Hi Ahmad,

> -----Original Message-----
> From: Ahmad Fatoum <a.fatoum@pengutronix.de>
> Sent: 2023年4月3日 16:42
> To: Clark Wang <xiaoning.wang@nxp.com>; peppe.cavallaro@st.com;
> alexandre.torgue@foss.st.com; joabreu@synopsys.com;
> davem@davemloft.net; edumazet@google.com; kuba@kernel.org;
> pabeni@redhat.com; mcoquelin.stm32@gmail.com
> Cc: netdev@vger.kernel.org; linux-stm32@st-md-mailman.stormreply.com;
> linux-arm-kernel@lists.infradead.org; linux-kernel@vger.kernel.org
> Subject: Re: [Linux-stm32] [PATCH] net: stmmac: remove the limitation of
> adding vlan in promisc mode
> 
> Hello Clark,
> 
> On 03.04.23 10:17, Clark Wang wrote:
> > When using brctl to add eqos to a bridge, it will frist set eqos to
> > promisc mode and then set a VLAN for this bridge with a filer VID
> > value of 1.
> >
> > These two error returns limit the use of brctl, resulting in the
> > inability of the bridge to be enabled on eqos. So remove them.
> >
> > Signed-off-by: Clark Wang <xiaoning.wang@nxp.com>
> 
> Please add a suitable Fixes: tag pointing at the commit introducing the
> regression.


Thanks. I will add it in V2.

Best Regards,
Clark Wang
> 
> Thanks,
> Ahmad
> 
> > ---
> >  drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c | 12 ------------
> >  1 file changed, 12 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
> > b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
> > index 8c7a0b7c9952..64bbe15a699e 100644
> > --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
> > +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
> > @@ -472,12 +472,6 @@ static int dwmac4_add_hw_vlan_rx_fltr(struct
> net_device *dev,
> >  	if (vid > 4095)
> >  		return -EINVAL;
> >
> > -	if (hw->promisc) {
> > -		netdev_err(dev,
> > -			   "Adding VLAN in promisc mode not supported\n");
> > -		return -EPERM;
> > -	}
> > -
> >  	/* Single Rx VLAN Filter */
> >  	if (hw->num_vlan == 1) {
> >  		/* For single VLAN filter, VID 0 means VLAN promiscuous */ @@
> > -527,12 +521,6 @@ static int dwmac4_del_hw_vlan_rx_fltr(struct
> > net_device *dev,  {
> >  	int i, ret = 0;
> >
> > -	if (hw->promisc) {
> > -		netdev_err(dev,
> > -			   "Deleting VLAN in promisc mode not supported\n");
> > -		return -EPERM;
> > -	}
> > -
> >  	/* Single Rx VLAN Filter */
> >  	if (hw->num_vlan == 1) {
> >  		if ((hw->vlan_filter[0] & GMAC_VLAN_TAG_VID) == vid) {
> 
> --
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Re: [Linux-stm32] [PATCH] net: stmmac: remove the limitation of adding vlan in promisc mode

[Vladimir Oltean]

Hi Clark,

On Mon, Apr 03, 2023 at 08:43:54AM +0000, Clark Wang wrote:
> Thanks. I will add it in V2.

Please always check the latest state of net.git/main before submitting
patches. In this case, you seem to have missed the existence of commit
a7602e7332b9 ("net: stmmac: don't reject VLANs when IFF_PROMISC is set").

Please also check Documentation/process/maintainer-netdev.rst for next
time, especially the part where it says to designate the patch as
"[PATCH net]" (it also says to add a Fixes tag as Ahmad already pointed out).

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