linux-kernel - Re: [PATCH 3/4] ide: add struct ide_dma

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Message-Id: <200804121432.03366.bzolnier@gmail.com>
Date:	Sat, 12 Apr 2008 14:32:03 +0200
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 3/4] ide: add struct ide_dma_ops


Hi,

On Friday 11 April 2008, Sergei Shtylyov wrote:
> Hello.
> 
> Bartlomiej Zolnierkiewicz wrote:
> 
> >>    Now where is the code which selects the correct dma_ops for the 
> >>> HPT36x/370/372/372N chip with device ID 4 I'm asking you?  :-) 
> 
> > fixed
> 
>     Not actually... :-/

Arghhh.  I see now that the HPT370/370A needs a special handling...
(HPT372/372N has already been handled by 'idx++')

[...]

> > @@ -1483,6 +1489,7 @@ static const struct ide_port_info hpt366
> >  		.enablebits	= {{0x50,0x04,0x04}, {0x54,0x04,0x04}},
> >  		.udma_mask	= ATA_UDMA5,
> >  		.port_ops	= &hpt3xx_port_ops,
> > +		.dma_ops	= &hpt370_dma_ops,
> 
>     Wrong -- HPT374 should have hpt37x_dma_ops...

Yep, thanks for catching it.

interdiff between v2->v3:

[...]
v3:
* Two bugs slipped in v2 (noticed by Sergei):
  - use correct DMA ops for HPT374 (for real this time)
  - handle HPT370/HPT370A properly

[...]
diff -u b/drivers/ide/pci/hpt366.c b/drivers/ide/pci/hpt366.c
--- b/drivers/ide/pci/hpt366.c
+++ b/drivers/ide/pci/hpt366.c
@@ -1489,7 +1489,7 @@
 		.enablebits	= {{0x50,0x04,0x04}, {0x54,0x04,0x04}},
 		.udma_mask	= ATA_UDMA5,
 		.port_ops	= &hpt3xx_port_ops,
-		.dma_ops	= &hpt370_dma_ops,
+		.dma_ops	= &hpt37x_dma_ops,
 		.host_flags	= IDE_HFLAGS_HPT3XX,
 		.pio_mask	= ATA_PIO4,
 		.mwdma_mask	= ATA_MWDMA2,
@@ -1563,6 +1563,10 @@
 	d.name = info->chip_name;
 	d.udma_mask = info->udma_mask;
 
+	/* fixup ->dma_ops for HPT370/HPT370A */
+	if (info == &hpt370 || info == &hpt370a)
+		d.dma_ops = &hpt370_dma_ops;
+
 	pci_set_drvdata(dev, (void *)info);
 
 	if (info == &hpt36x || info == &hpt374)
--
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