linux-kernel - Re: [git patches] libata fixes

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Message-Id: <20070627003841.68fd0ea9.akpm@linux-foundation.org>
Date:	Wed, 27 Jun 2007 00:38:41 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Jeff Garzik <jeff@...zik.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-ide@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [git patches] libata fixes

On Wed, 27 Jun 2007 03:35:26 -0400 Jeff Garzik <jeff@...zik.org> wrote:

> +	/* Don't allow DMA if it isn't multiple of 16 bytes.  Quite a
> +	 * few ATAPI devices choke on such DMA requests.
> +	 */
> +	if (unlikely(qc->nbytes & 15))
> +		return 1;

It might be worth emitting a diagnostic when this happens.
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