linux-kernel - Re: wlcore: might_sleep operation in interrupt handler

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Message-ID: <1343765698.4474.10.camel@jlt3.sipsolutions.net>
Date:	Tue, 31 Jul 2012 22:14:58 +0200
From:	Johannes Berg <johannes@...solutions.net>
To:	Denis Yefremov <yefremov.denis@...il.com>
Cc:	Luciano Coelho <coelho@...com>,
	"John W. Linville" <linville@...driver.com>,
	Eliad Peller <eliad@...ery.com>,
	Arik Nemtsov <arik@...ery.com>, Eyal Shapira <eyal@...ery.com>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, ldv-project@...ras.ru
Subject: Re: wlcore: might_sleep operation in interrupt handler

On Tue, 2012-07-31 at 22:28 +0400, Denis Yefremov wrote:
> Interrupt handler wlcore_irq in wlcore/main.c file
> invokes mutex_lock that is might sleep operation.

> int __devinit wlcore_probe(struct wl1271 *wl, struct platform_device *pdev)
> {
> ...
>         ret = request_threaded_irq(wl->irq, wl12xx_hardirq, wlcore_irq,
>                                    irqflags,
>                                    pdev->name, wl);

Yes, umm, why do you think they're using a *threaded* IRQ? :-)

johannes

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