linux-kernel - Re: PCIE

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Message-ID: <adazm3v89hv.fsf@cisco.com>
Date:	Wed, 23 May 2007 15:23:40 -0700
From:	Roland Dreier <rdreier@...co.com>
To:	Manu Abraham <abraham.manu@...il.com>
Cc:	Greg KH <greg@...ah.com>, linux-pci@...ey.karlin.mff.cuni.cz,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: PCIE

 > If i uncomment the saa716x_read or write, what i get is a solid freeze
 > on module load. If i leave it commented out, the module loads fine.

That sounds like a typical bug during driver development... you're
probably wedging the hardware by doing the wrong access.

I didn't see the source for saa716x_read or write in the code you
posted, so it's hard to say if there's a problem with them.

Is your interrupt handler getting called?  Is the device generating
interrupts?

 > That part is then fine. Does MSI require any special tinkering ?

Just pci_enable_msi() as usual.

 - R.
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