From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
To: Ulrich Hecht <uli+renesas@fpond.eu>, linux-renesas-soc@vger.kernel.org
Cc: netdev@vger.kernel.org, davem@davemloft.net, wsa@the-dreams.de,
horms@verge.net.au, magnus.damm@gmail.com
Subject: Re: [PATCH] ravb: implement MTU change while device is up
Date: Wed, 8 May 2019 18:59:01 +0300 [thread overview]
Message-ID: <1f7be29e-c85a-d63d-c83f-357a76e8ca45@cogentembedded.com> (raw)
In-Reply-To: <1557328882-24307-1-git-send-email-uli+renesas@fpond.eu>
Hello!
On 05/08/2019 06:21 PM, Ulrich Hecht wrote:
> Uses the same method as various other drivers: shut the device down,
> change the MTU, then bring it back up again.
>
> Tested on Renesas D3 Draak board.
>
> Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
You should have CC'ed me (as an reviewer for the Renesas drivers).
> ---
> drivers/net/ethernet/renesas/ravb_main.c | 11 +++++++----
> 1 file changed, 7 insertions(+), 4 deletions(-)
What about sh_eth?
>
> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index ef8f089..02c247c 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> @@ -1810,13 +1810,16 @@ static int ravb_do_ioctl(struct net_device *ndev, struct ifreq *req, int cmd)
>
> static int ravb_change_mtu(struct net_device *ndev, int new_mtu)
> {
> - if (netif_running(ndev))
> - return -EBUSY;
> + if (!netif_running(ndev)) {
> + ndev->mtu = new_mtu;
> + netdev_update_features(ndev);
> + return 0;
> + }
>
> + ravb_close(ndev);
> ndev->mtu = new_mtu;
> - netdev_update_features(ndev);
>
> - return 0;
> + return ravb_open(ndev);
How about the code below instead?
if (netif_running(ndev))
ravb_close(ndev);
ndev->mtu = new_mtu;
netdev_update_features(ndev);
if (netif_running(ndev))
return ravb_open(ndev);
return 0;
[...]
MBR, Sergei
next prev parent reply other threads:[~2019-05-08 15:59 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-08 15:21 [PATCH] ravb: implement MTU change while device is up Ulrich Hecht
2019-05-08 15:59 ` Sergei Shtylyov [this message]
2019-05-08 16:52 ` Niklas Söderlund
2019-05-09 6:57 ` Ulrich Hecht
2019-05-09 10:10 ` Simon Horman
2019-05-09 15:32 ` Ulrich Hecht
2019-05-13 12:18 ` Simon Horman
2019-05-20 12:09 ` Wolfram Sang
2019-05-22 11:59 ` Simon Horman
2019-05-23 1:02 ` Ulrich Hecht
2019-05-08 16:50 ` Niklas Söderlund
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