linux-kernel - Re: [PATCH] USB: ehci-s5p: Fix phy reset

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Message-ID: <CAD=FV=W331nkdJJhXrXe739o+-iBSzGAS6anu+C_mmix0MbAUg@mail.gmail.com>
Date:	Wed, 13 Mar 2013 10:59:37 -0700
From:	Doug Anderson <dianders@...omium.org>
To:	Alexander Graf <agraf@...e.de>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-usb@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	dmueller@...e.de, Vivek Gautam <gautam.vivek@...sung.com>,
	Jingoo Han <jg1.han@...sung.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH] USB: ehci-s5p: Fix phy reset

Alexander,

On Wed, Mar 13, 2013 at 10:45 AM, Alexander Graf <agraf@...e.de> wrote:
>
>>> +       gpio_free(gpio);
>>
>> Freeing the gpio is a little on the iffy side since you actually care
>> about keeping the value.  Perhaps you can change this to
>> devm_gpio_request_one() and avoid the free?  I was about to submit a
>> patch to do just that (since otherwise you run into trouble if you
>> ever defer the probe) but then ran across your patch.
>
> I could also just return it when the function exits and only free it when we exit the probe function with a negative value. The reason I put it in here was that on probe deferral, the pin simply gets blocked.
>
> However, I could probably also just completely take the gpio_free() out of this patch and resubmit, as it should be pretty much unrelated. Then you can patch it properly.

Sure, if you want to resubmit without the gpio_free() I'll submit a
new patch atop yours with the change to devm and people can see if
they like it...
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