From: Edgar Toernig <froese@gmx.de>
To: Manu Abraham <manu@linuxtv.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: free free irq and Oops on cat /proc/interrupts
Date: Sun, 18 Sep 2005 03:26:33 +0200 [thread overview]
Message-ID: <20050918032633.15a9b1b6.froese@gmx.de> (raw)
In-Reply-To: <432BE7F7.90508@linuxtv.org>
Manu Abraham wrote:
>
> Can somebody give me a pointer as to what i am possibly doing wrong.
>
> i get a "free free IRQ" on free_irq()..
>
>[and a kernel oops]
| if (request_irq(pdev->irq, mantis_pci_irq, SA_SHIRQ | SA_INTERRUPT,
| DRIVER_NAME, mantis) < 0) {
|[...]
| free_irq(pdev->irq, pdev);
The last arg of request_irq and free_irq has to match - it is the id
that distinguishes different users of the same irq. As there never
was a request_irq with pdev you get that error on free_irq.
The module unload still takes place. So trying to cat /proc/interrupts
later on will stumble over the still installed handler with the mantis
id - unfortunately, the driver (and especially DRIVER_NAME) is no longer
in memory ...
Ciao, ET.
prev parent reply other threads:[~2005-09-18 1:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-17 9:55 Manu Abraham
2005-09-18 1:26 ` Edgar Toernig [this message]
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