linux-kernel - Re: [PATCH 01/64] libata: fix CFA handling in ide_timing

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Message-ID: <4B54A724.6080701@ru.mvista.com>
Date:	Mon, 18 Jan 2010 21:23:32 +0300
From:	Sergei Shtylyov <sshtylyov@...mvista.com>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Cc:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/64] libata: fix CFA handling in ide_timing_compute()

Hello.

Bartlomiej Zolnierkiewicz wrote:

> From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
> Subject: [PATCH] libata: fix CFA handling in ide_timing_compute()
>
> Use standard cycle timing for CFA PIO5 and PIO6 modes.
>
> Based on commit 74638c8 for IDE subsystem.
>
> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
> ---
>  drivers/ata/libata-core.c |   17 +++++++++++------
>  1 file changed, 11 insertions(+), 6 deletions(-)
>
> Index: b/drivers/ata/libata-core.c
> ===================================================================
> --- a/drivers/ata/libata-core.c
> +++ b/drivers/ata/libata-core.c
> @@ -3211,6 +3211,7 @@ const struct ata_timing *ata_timing_find
>  int ata_timing_compute(struct ata_device *adev, unsigned short speed,
>  		       struct ata_timing *t, int T, int UT)
>  {
> +	const u16 *id = adev->id;
>  	const struct ata_timing *s;
>  	struct ata_timing p;
>  
> @@ -3228,14 +3229,18 @@ int ata_timing_compute(struct ata_device
>  	 * PIO/MW_DMA cycle timing.
>  	 */
>  
> -	if (adev->id[ATA_ID_FIELD_VALID] & 2) {	/* EIDE drive */
> +	if (id[ATA_ID_FIELD_VALID] & 2) {	/* EIDE drive */
>  		memset(&p, 0, sizeof(p));
> +
>  		if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
>   

   BTW, shouldn't this actually be 'speed < XFER_SW_DMA_0'?

MBR, Sergei

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