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

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Date:	Mon, 18 Jan 2010 19:29:17 +0100
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	Sergei Shtylyov <sshtylyov@...mvista.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()

On Monday 18 January 2010 07:23:32 pm Sergei Shtylyov wrote:
> Hello.

Hi!

> 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'?

Good catch, I'll fix the patch later (would you be willing to fix
ide-timings.c side of things?).

--
Bartlomiej Zolnierkiewicz
--
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