linux-kernel - Re: [PATCH] pinctrl: rockchip: Avoid losing interrupts when supporting both edges

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Message-ID: <CACRpkdYOqbsTgNMx8n_NmAe2vtfx+mGRGpw3zUCqjsrFiH0ZVw@mail.gmail.com>
Date:	Thu, 8 Jan 2015 20:25:02 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Doug Anderson <dianders@...omium.org>
Cc:	Heiko Stuebner <heiko@...ech.de>,
	Alexandru Stan <amstan@...omium.org>,
	"open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pinctrl: rockchip: Avoid losing interrupts when
 supporting both edges

On Mon, Dec 22, 2014 at 7:47 PM, Doug Anderson <dianders@...omium.org> wrote:

> I was seeing cases where I was losing interrupts when inserting and
> removing SD cards.  Sometimes the card would get "stuck" in the
> inserted state.
>
> I believe that the problem was related to the code to handle the case
> where we needed both rising and falling edges.  This code would
> disable the interrupt as the polarity was switched.  If an interrupt
> came at the wrong time it could be lost.
>
> We'll match what the gpio-dwapb.c driver does upstream and change the
> interrupt polarity without disabling things.
>
> Signed-off-by: Doug Anderson <dianders@...omium.org>

Patch applied for fixes.

Yours,
Linus Walleij
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