linux-kernel - Re: [PATCH 06/10] sata: ahci_da850: implement a softreset quirk

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Message-ID: <20170115231208.GD14446@mtj.duckdns.org>
Date:   Sun, 15 Jan 2017 18:12:08 -0500
From:   Tejun Heo <tj@...nel.org>
To:     Bartosz Golaszewski <bgolaszewski@...libre.com>
Cc:     Kevin Hilman <khilman@...nel.org>, Sekhar Nori <nsekhar@...com>,
        Patrick Titiano <ptitiano@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        David Lechner <david@...hnology.com>,
        linux-ide@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 06/10] sata: ahci_da850: implement a softreset quirk

On Fri, Jan 13, 2017 at 01:38:00PM +0100, Bartosz Golaszewski wrote:
> +static int ahci_da850_softreset(struct ata_link *link,
> +				unsigned int *class, unsigned long deadline)
> +{
> +	int pmp, ret;
> +
> +	pmp = sata_srst_pmp(link);
> +
> +	ret = ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
> +	if (pmp && ret == -EBUSY)
> +		return ahci_do_softreset(link, class, 0,
> +					 deadline, ahci_check_ready);
> +
> +	return ret;
> +}

Please add some comments explaining what's going on.

Thanks.

-- 
tejun