linux-kernel - Re: [git patches] libata fixes for .26

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Message-ID: <486EE804.6020202@kernel.org>
Date:	Sat, 05 Jul 2008 12:18:28 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Jeff Garzik <jeff@...zik.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-ide@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [git patches] libata fixes for .26

Tejun Heo wrote:
> so, it basically behaves like level triggered IRQ latch for ports,
> which also creates an easy-to-miss requirement for MSI implementation
> where the controller should generate a new MSI message when the driver
> clears some of the IRQ pending bits but not all.

Oops, confused.  The easy-to-miss requirement is the controller needing
to resend the message if the irq_stat is cleared but port IRQ is still
pending.  Resending on partial clear is always necessary.

Thanks.

-- 
tejun
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