linux-kernel - Re: PCI: MSI interrupts masked using prohibited method

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Message-ID: <m3wsjkemf0.fsf@maximus.localdomain>
Date:	Thu, 17 Jul 2008 14:16:03 +0200
From:	Krzysztof Halasa <khc@...waw.pl>
To:	Matthew Wilcox <matthew@....cx>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	David Vrabel <david.vrabel@....com>,
	Kernel development list <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: PCI: MSI interrupts masked using prohibited method

Matthew Wilcox <matthew@....cx> writes:

> For these devices, we call
>                         msi_set_enable(entry->dev, !flag);
>
> which turns off the PCI_MSI_FLAGS_ENABLE bit.  I'm not sure I see the
> bit in the PCI spec that says devices are then allowed to ignore the
> Interrupt Disable bit in the device control register, but I concede such
> devices may be out there.

Remember that MSI predates INTX disable bit.
-- 
Krzysztof Halasa
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