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From: Jing Xu <xujing_cn2001@yahoo.com>
To: linux-kernel@vger.kernel.org
Subject: how to reserve irqs at boot time
Date: Mon, 1 Dec 2003 14:28:32 -0800 (PST)	[thread overview]
Message-ID: <20031201222832.9385.qmail@web41301.mail.yahoo.com> (raw)

Hello, 
 
I'm running linux 2.4.20 and rtai 24.1.11. My linux
kernel module needs to use IRQ 9 10 11 for AGP graphic
card, sound card and PCI-Dio24 IO card. These irqs are
also shared by USB controllers. My module hangs when
it tries to request the above irqs used by USB
devices. I figured it would be a good idea to remove
this apparent conflict. I have scoured the web and
found that I can reserve these IRQs by specifying
pci=irqmask= on the kernel boot line.

I have tried to set "pci=irqmask=0xf1e8" to reserve
Irq 9 10 11 4 from my driver, and it hasn't had any
effect - those irqs are still used by usb controllers
on initialization. 
 
How do I reserve these IRQ's?  Is there some other
configuration file I haven't found? 

Thanks in advance,

jing 


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                 reply	other threads:[~2003-12-01 22:28 UTC|newest]

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