netdev - Re: [wpan v3 1/6] net: ieee802154: hwsim: Ensure proper channel selection at probe time

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Message-ID: <d3cab1bb-184d-73f9-7bd8-8eefc5e7e70c@datenfreihafen.org>
Date:   Tue, 25 Jan 2022 15:28:11 +0100
From:   Stefan Schmidt <stefan@...enfreihafen.org>
To:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Alexander Aring <alex.aring@...il.com>,
        linux-wpan@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        David Girault <david.girault@...vo.com>,
        Romuald Despres <romuald.despres@...vo.com>,
        Frederic Blain <frederic.blain@...vo.com>,
        Nicolas Schodet <nico@...fr.eu.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [wpan v3 1/6] net: ieee802154: hwsim: Ensure proper channel
 selection at probe time


Hello.

On 25.01.22 13:14, Miquel Raynal wrote:
> Drivers are expected to set the PHY current_channel and current_page
> according to their default state. The hwsim driver is advertising being
> configured on channel 13 by default but that is not reflected in its own
> internal pib structure. In order to ensure that this driver consider the
> current channel as being 13 internally, we at least need to set the
> pib->channel field to 13.
> 
> Fixes: f25da51fdc38 ("ieee802154: hwsim: add replacement for fakelb")
> Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
> ---
>   drivers/net/ieee802154/mac802154_hwsim.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/ieee802154/mac802154_hwsim.c b/drivers/net/ieee802154/mac802154_hwsim.c
> index 8caa61ec718f..00ec188a3257 100644
> --- a/drivers/net/ieee802154/mac802154_hwsim.c
> +++ b/drivers/net/ieee802154/mac802154_hwsim.c
> @@ -786,6 +786,7 @@ static int hwsim_add_one(struct genl_info *info, struct device *dev,
>   		goto err_pib;
>   	}
>   
> +	pib->page = 13;

You want to set channel not page here.

>   	rcu_assign_pointer(phy->pib, pib);
>   	phy->idx = idx;
>   	INIT_LIST_HEAD(&phy->edges);
> 

regards
Stefan Schmidt