netdev - Re: [PATCH] mac802154_hwsim: allow users to specify the number of simulated radios dinamically instead of the previously hardcoded value of 2

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Message-ID: <CAK-6q+i1BAtsYbMHMBfYK89HfiyQbXONjivt51GDA_ihhe4-oA@mail.gmail.com>
Date: Sat, 7 Jun 2025 13:34:16 -0400
From: Alexander Aring <aahringo@...hat.com>
To: Ramon Fontes <ramonreisfontes@...il.com>
Cc: davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com, 
	linux-wpan@...r.kernel.org, alex.aring@...il.com, miquel.raynal@...tlin.com, 
	netdev@...r.kernel.org
Subject: Re: [PATCH] mac802154_hwsim: allow users to specify the number of
 simulated radios dinamically instead of the previously hardcoded value of 2

Hi,

On Tue, Jun 3, 2025 at 2:33 PM Ramon Fontes <ramonreisfontes@...il.com> wrote:
>
> * Added a new module parameter radios
> * Modified the loop in hwsim_probe()
> * Updated log message in hwsim_probe()
>

no problem with this patch, just a note see below.

Acked-by: Alexander Aring <aahringo@...hat.com>

> Signed-off-by: Ramon Fontes <ramonreisfontes@...il.com>
> ---
>  drivers/net/ieee802154/mac802154_hwsim.c | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/ieee802154/mac802154_hwsim.c b/drivers/net/ieee802154/mac802154_hwsim.c
> index 2f7520454..dadae6247 100644
> --- a/drivers/net/ieee802154/mac802154_hwsim.c
> +++ b/drivers/net/ieee802154/mac802154_hwsim.c
> @@ -27,6 +27,10 @@
>  MODULE_DESCRIPTION("Software simulator of IEEE 802.15.4 radio(s) for mac802154");
>  MODULE_LICENSE("GPL");
>
> +static int radios = 2;
> +module_param(radios, int, 0444);
> +MODULE_PARM_DESC(radios, "Number of simulated radios");
> +
>  static LIST_HEAD(hwsim_phys);
>  static DEFINE_MUTEX(hwsim_phys_lock);
>
> @@ -1018,13 +1022,13 @@ static int hwsim_probe(struct platform_device *pdev)
>         struct hwsim_phy *phy, *tmp;
>         int err, i;
>
> -       for (i = 0; i < 2; i++) {
> +       for (i = 0; i < radios; i++) {
>                 err = hwsim_add_one(NULL, &pdev->dev, true);
>                 if (err < 0)
>                         goto err_slave;
>         }
>
> -       dev_info(&pdev->dev, "Added 2 mac802154 hwsim hardware radios\n");
> +       dev_info(&pdev->dev, "Added %d mac802154 hwsim hardware radios\n", radios);
>         return 0;
>
>  err_slave:
> @@ -1057,6 +1061,9 @@ static __init int hwsim_init_module(void)
>  {
>         int rc;
>
> +       if (radios < 0)
> +               return -EINVAL;
> +

handle as unsigned then this check would not be necessary?

- Alex