linux-kernel - ata_sff_data_xfer* return value

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Date:	Sun, 08 Nov 2009 20:27:02 +0100
From:	Krzysztof Halasa <khc@...waw.pl>
To:	linux-ide@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>
Subject: ata_sff_data_xfer* return value

Hi,

I wonder if this is entirely correct? If so, why?
Only relevant parts left.

 *	RETURNS:
 *	Bytes consumed.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 */
unsigned int ata_sff_data_xfer(struct ata_device *dev, unsigned char *buf,
			       unsigned int buflen, int rw)
{
	unsigned int words = buflen >> 1;

	...

	/* Transfer trailing byte, if any. */
	if (unlikely(buflen & 0x01)) {
		...
		words++;
	}

	return words << 1;



same here:

unsigned int ata_sff_data_xfer32(struct ata_device *dev, unsigned char *buf,
			       unsigned int buflen, int rw)
{
	...
	return (buflen + 1) & ~1;

Please keep me in CC:, I'm not on the IDE list. Thanks.
-- 
Krzysztof Halasa
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