linux-kernel - Re: [PATCH v5 4/5] net: wan: fsl_qmc_hdlc: Add runtime timeslots changes support

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Message-ID: <ZeCg24Iv8qDmxNV9@smile.fi.intel.com>
Date: Thu, 29 Feb 2024 17:20:59 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Herve Codina <herve.codina@...tlin.com>
Cc: Vadim Fedorenko <vadim.fedorenko@...ux.dev>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Yury Norov <yury.norov@...il.com>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, Andrew Lunn <andrew@...n.ch>,
	Mark Brown <broonie@...nel.org>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v5 4/5] net: wan: fsl_qmc_hdlc: Add runtime timeslots
 changes support

On Thu, Feb 29, 2024 at 03:15:52PM +0100, Herve Codina wrote:
> QMC channels support runtime timeslots changes but nothing is done at
> the QMC HDLC driver to handle these changes.
> 
> Use existing IFACE ioctl in order to configure the timeslots to use.

..

> +	bitmap_scatter(ts_mask, map, ts_mask_avail, 64);

Wondering if we may have returned value more useful and hence having something like

	n = bitmap_scatter(...);

> +	if (bitmap_weight(ts_mask, 64) != bitmap_weight(map, 64)) {

	if (n != ...) {

?

> +		dev_err(qmc_hdlc->dev, "Cannot translate timeslots %64pb -> (%64pb, %64pb)\n",
> +			map, ts_mask_avail, ts_mask);
> +		return -EINVAL;
> +	}

..

> +	bitmap_gather(map, ts_mask, ts_mask_avail, 64);
> +
> +	if (bitmap_weight(ts_mask, 64) != bitmap_weight(map, 64)) {
> +		dev_err(qmc_hdlc->dev, "Cannot translate timeslots (%64pb, %64pb) -> %64pb\n",
> +			ts_mask_avail, ts_mask, map);
> +		return -EINVAL;
> +	}

Ditto.

-- 
With Best Regards,
Andy Shevchenko