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From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
To: Mario Schwalbe <schwalbe@inf.tu-dresden.de>
Subject: Re: [PATCH] ide: Fix drive's DWORD-IO handling
Date: Mon, 29 Dec 2008 19:47:52 +0100
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Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org,
       Sergei Shtylyov <sshtylyov@ru.mvista.com>
References: <494A5BC9.7000605@inf.tu-dresden.de> <200812192001.51335.bzolnier@gmail.com>
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On Friday 19 December 2008, Bartlomiej Zolnierkiewicz wrote:> On Thursday 18 December 2008, Mario Schwalbe wrote:> > Resubmitted on request.> > > > According the documentation, id[ATA_ID_DWORD_IO] is non-zero if> > the drive supports dword IO, while the code disables support by> > setting IDE_DFLAG_NO_IO_32BIT. In addition, this word has been> > reused by the ATA8 specification. This patch fixes both cases.> > > > Signed-off-by: Mario Schwalbe <schwalbe@inf.tu-dresden.de>> > ---> >  drivers/ide/ide-probe.c |    2 +-> >  1 files changed, 1 insertions(+), 1 deletions(-)> > > > diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c> > index c55bdbd..859b0e5 100644> > --- a/drivers/ide/ide-probe.c> > +++ b/drivers/ide/ide-probe.c> > @@ -856,7 +856,7 @@ static void ide_port_tune_devices(ide_hwif_t *hwif)> >  		ide_drive_t *drive = &hwif->drives[unit];> > > >  		if ((hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) ||> > -		    drive->id[ATA_ID_DWORD_IO])> > +		    !ata_id_has_dword_io(drive->id))> >  			drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;> >  		else> >  			drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT;> > Since it seems that libata developers need more time to fully analyze> issues with ata_id_has_dword_io() and I don't want to delay this fix> because if it could you please modify the patch according to Sergei's> suggestion of removing id[ATA_ID_DWORD_IO] check altogether?> > [ It is a safe thing to do since the old code has been enabling 32-bit>   I/O _unless_ the ATA-1 dword I/O bit for VU compatibility was set... ]
I merged the patch and did the modification while at it:
From: Mario Schwalbe <schwalbe@inf.tu-dresden.de>Subject: [PATCH] ide: Fix drive's DWORD-IO handling
According the documentation, id[ATA_ID_DWORD_IO] is non-zero ifthe drive supports dword IO, while the code disables support bysetting IDE_DFLAG_NO_IO_32BIT. In addition, this word has beenreused by the ATA8 specification. This patch fixes both cases.
Signed-off-by: Mario Schwalbe <schwalbe@inf.tu-dresden.de>Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>[bart: remove id[ATA_ID_DWORD_IO] check altogether per Sergei's suggestion]Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>--- drivers/ide/ide-probe.c |    3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
Index: b/drivers/ide/ide-probe.c===================================================================--- a/drivers/ide/ide-probe.c+++ b/drivers/ide/ide-probe.c@@ -849,8 +849,7 @@ static void ide_port_tune_devices(ide_hw 	}  	ide_port_for_each_dev(i, drive, hwif) {-		if ((hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) ||-		    drive->id[ATA_ID_DWORD_IO])+		if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) 			drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; 		else 			drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT; 
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