linux-kernel - Re: [RFC] Simple userspace interface for PCI drivers

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Date:	Sun, 03 Sep 2006 10:34:19 +0200
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Pavel Machek <pavel@....cz>
Cc:	Greg KH <greg@...ah.com>, linux-kernel@...r.kernel.org
Subject: Re: [RFC] Simple userspace interface for PCI drivers

On Fri, 2006-09-01 at 21:17 +0000, Pavel Machek wrote:
> Hi!
> 
> > And the name is a bit ackward, anyone have a better suggestion?
> 
> drivers/uio (for userspace io driver)?

not too bad.

> And yes, I think this one _should_ taint the kernel. When userspace
> starts playing with interrupts, chances of kernel crash are high.

Userspace does not play with interrupts directly. You still have a small
stub driver, which does the primary interrupt handling, else you would
have a hard time to deal with shared irqs.

> Does it work properly with pci shared interrupts?

See the SERCOS example I posted.

	tglx



-- 
VGER BF report: U 0.500128
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