linux-kernel - Re: [PATCH v6 07/12] usb: chipidea: add a usb2 driver for ci13xxx

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Message-Id: <201409252112.07513.arnd@arndb.de>
Date:	Thu, 25 Sep 2014 21:12:07 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Antoine Tenart <antoine.tenart@...e-electrons.com>,
	sebastian.hesselbarth@...il.com, Peter.Chen@...escale.com,
	balbi@...com, p.zabel@...gutronix.de,
	thomas.petazzoni@...e-electrons.com, zmxu@...vell.com,
	devicetree@...r.kernel.org, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, alexandre.belloni@...e-electrons.com,
	jszhang@...vell.com
Subject: Re: [PATCH v6 07/12] usb: chipidea: add a usb2 driver for ci13xxx

On Tuesday 23 September 2014, Antoine Tenart wrote:
> +static int ci_hdrc_usb2_dt_probe(struct device *dev,
> +                                struct ci_hdrc_platform_data *ci_pdata)
> +{
> +       ci_pdata->phy = of_phy_get(dev->of_node, 0);

FWIW, I accidentally built a kernel with this driver enabled and got a warning
for this code. The problem is that ci_pdata->phy is a 'struct usb_phy' pointer,
while of_phy_get() returns a generic 'struct phy'. While the two have similar
behavior, they are not the same thing and this can't work.

	Arnd
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