linux-kernel - Re: [PATCH] Fix MSI-X with NIU cards

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Date:	Tue, 12 May 2009 00:30:11 +1000
From:	Michael Ellerman <michael@...erman.id.au>
To:	David Miller <davem@...emloft.net>
Cc:	matthew@....cx, jbarnes@...tuousgeek.org,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Fix MSI-X with NIU cards

On Sun, 2009-05-10 at 22:36 -0700, David Miller wrote:
> From: Michael Ellerman <michael@...erman.id.au>
> Date: Mon, 11 May 2009 11:21:51 +1000
> 
> > So I guess this device is just silently ignoring that write?
> 
> No, it signals a fault on the PCI bus, which is how we noticed
> this problem in the first place.

But the patch doesn't change that? It just removes the readl AFAICS:

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 6f2e629..3627732 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -455,8 +455,6 @@ static int msix_capability_init(struct pci_dev *dev,
                entry->msi_attrib.default_irq = dev->irq;
                entry->msi_attrib.pos = pos;
                entry->mask_base = base;
-               entry->masked = readl(base + j * PCI_MSIX_ENTRY_SIZE +
-                                       PCI_MSIX_ENTRY_VECTOR_CTRL_OFFSET);
                msix_mask_irq(entry, 1);
 

Or has msix_mask_irq() changed since 413f81eba?

cheers

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