linux-kernel - Re: [PATCH 02/10] net: stmmac: Honor DT parameter to force DMA store and forward mode

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Message-ID: <CAGb2v67ZNtbQm+ZW5v_3wNbz1=oLhXks6gbTSjLYa=Nnoz8w-A@mail.gmail.com>
Date:	Sat, 7 Dec 2013 09:23:27 +0800
From:	Chen-Yu Tsai <wens@...e.org>
To:	David Miller <davem@...emloft.net>
Cc:	Giuseppe Cavallaro <peppe.cavallaro@...com>,
	netdev@...r.kernel.org, "rob.herring" <rob.herring@...xeda.com>,
	devicetree <devicetree@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-sunxi@...glegroups.com,
	Srinivas KANDAGATLA <srinivas.kandagatla@...com>,
	"maxime.ripard" <maxime.ripard@...e-electrons.com>
Subject: Re: [PATCH 02/10] net: stmmac: Honor DT parameter to force DMA store
 and forward mode

Resending reply due to incorrect MIME type.

On Sat, Dec 7, 2013 at 5:26 AM, David Miller <davem@...emloft.net> wrote:
>
> From: Chen-Yu Tsai <wens@...e.org>
> Date: Sat,  7 Dec 2013 01:29:35 +0800
>
> > @@ -47,6 +47,7 @@ static int stmmac_probe_config_dt(struct platform_device *pdev,
> >               plat->bus_id = 0;
> >
> >       of_property_read_u32(np, "snps,phy-addr", &plat->phy_addr);
> > +     plat->force_sf_dma_mode = of_property_read_bool(np, "snps,force_sf_dma_mode");
>
> Will this do the right thing for when the property is not present?
> Right now the force_sf_dma_mode value is always false.

of_property_read_bool will return false when the property is not present.

> In fact won't it override the explicit settings done elsewhere in the
> driver?

Point taken. The current implementation will override settings passed from
platform data. ORing the two would be better.


Thanks
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