netdev - Re: [patch net-next v4 6/7] rocker: remove nowait from switchdev callbacks.

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Message-ID: <CAE4R7bDfDCEGcHY=y+77DbC0z09ogN9jiO_qBhb+utwXTUzmHw@mail.gmail.com>
Date:	Mon, 12 Oct 2015 21:02:28 -0700
From:	Scott Feldman <sfeldma@...il.com>
To:	Jiri Pirko <jiri@...nulli.us>
Cc:	Netdev <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Ido Schimmel <idosch@...lanox.com>,
	Elad Raz <eladr@...lanox.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
	"andrew@...n.ch" <andrew@...n.ch>,
	john fastabend <john.fastabend@...il.com>,
	David Laight <David.Laight@...lab.com>,
	"stephen@...workplumber.org" <stephen@...workplumber.org>
Subject: Re: [patch net-next v4 6/7] rocker: remove nowait from switchdev callbacks.

On Mon, Oct 12, 2015 at 11:03 AM, Jiri Pirko <jiri@...nulli.us> wrote:
> From: Jiri Pirko <jiri@...lanox.com>
>
> No need to avoid sleeping in switchdev callbacks now, as the switchdev
> core allows it.
>
> Signed-off-by: Jiri Pirko <jiri@...lanox.com>
> ---
>  drivers/net/ethernet/rocker/rocker.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/ethernet/rocker/rocker.c b/drivers/net/ethernet/rocker/rocker.c
> index bb956a5..9629c5b5 100644
> --- a/drivers/net/ethernet/rocker/rocker.c
> +++ b/drivers/net/ethernet/rocker/rocker.c
> @@ -3672,7 +3672,7 @@ static int rocker_port_fdb_flush(struct rocker_port *rocker_port,
>             rocker_port->stp_state == BR_STATE_FORWARDING)
>                 return 0;
>
> -       flags |= ROCKER_OP_FLAG_REMOVE;
> +       flags |= ROCKER_OP_FLAG_NOWAIT | ROCKER_OP_FLAG_REMOVE;

I understand the two changes below where you're removing NOWAIT, but
here you're adding NOWAIT which I'm not sure how that is related to
the switchdev core changes.  Is this two patches?


>         spin_lock_irqsave(&rocker->fdb_tbl_lock, lock_flags);
>
> @@ -4382,8 +4382,7 @@ static int rocker_port_attr_set(struct net_device *dev,
>
>         switch (attr->id) {
>         case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
> -               err = rocker_port_stp_update(rocker_port, trans,
> -                                            ROCKER_OP_FLAG_NOWAIT,
> +               err = rocker_port_stp_update(rocker_port, trans, 0,
>                                              attr->u.stp_state);
>                 break;
>         case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
> @@ -4517,7 +4516,7 @@ static int rocker_port_fdb_del(struct rocker_port *rocker_port,
>                                const struct switchdev_obj_port_fdb *fdb)
>  {
>         __be16 vlan_id = rocker_port_vid_to_vlan(rocker_port, fdb->vid, NULL);
> -       int flags = ROCKER_OP_FLAG_NOWAIT | ROCKER_OP_FLAG_REMOVE;
> +       int flags = ROCKER_OP_FLAG_REMOVE;
>
>         if (!rocker_port_is_bridged(rocker_port))
>                 return -EINVAL;
> --
> 1.9.3
>
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