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From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH 0/1] NIU: fix spurious interrupts
Date: Thu, 21 May 2009 15:18:41 -0700 (PDT)
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From: "Hong H. Pham" <hong.pham@windriver.com>
Date: Wed, 20 May 2009 11:57:16 -0400

> I've added the suggested instrumentations to dump out the LD interrupt
> registers
> when spurious interrupts occur.  Attached below is a kernel log.
> 
> In all cases, interrupts are being generated even though the LDG has
> been disarmed!

There's a bug in your debugging patch:

+		ld_im0_reg    = LD_IM0(ldn);
+		ldg_imgmt_reg = LDG_IMGMT(ldn);

You're reading the register "address", not the register's "value".
So all of the debugging output is bogus.

You need to do nr64(ld_im0_reg) and use that as the value, for
example.

Can you rerun the test with this fixed?  Thanks!