linux-kernel - call request_irq before or after hardware initialization?

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Message-ID: <46855F19.5080900@ampex.com>
Date:	Fri, 29 Jun 2007 12:35:53 -0700
From:	Li Juen Hwang <lwen@...ex.com>
To:	linux1394-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: call request_irq before or after hardware initialization?

Hi,

    Most 1394 drivers on Linux, ohci1394 for instance, calls 
request_irq() before
    initializing/enabling hardware chip. I'd like to reverse the order 
so that driver
    can exit the kernel without calling free_irq() if hardware failed. 
Is that ok?
    will it cause side effect? Thanks.

    Li-Juen

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