linux-kernel - Re: [PATCH 3/5] scc_pata: add ->dma_host_set and ->dma

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Date:	Tue, 22 Apr 2008 20:28:53 +0400
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 3/5] scc_pata: add ->dma_host_set and ->dma_start methods

Bartlomiej Zolnierkiewicz wrote:

> Add ->dma_host_set and ->dma_start methods (+ __scc_dma_end() helper)
> so scc_ide_{in,out}b() can be used directly.

    In fact, you could have used in/out_be32() instead like the rest of the 
code in this driver...

> There should be no functional changes caused by this patch.

> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>

Acked-by: Sergei Shtylyov <sshtylyov@...mvista.com>

> Index: b/drivers/ide/pci/scc_pata.c
> ===================================================================
> --- a/drivers/ide/pci/scc_pata.c
> +++ b/drivers/ide/pci/scc_pata.c
> @@ -260,6 +260,20 @@ static void scc_set_dma_mode(ide_drive_t
>  	out_be32((void __iomem *)udenvt_port, reg);
>  }
>  
> +static void scc_dma_host_set(ide_drive_t *drive, int on)
> +{
> +	ide_hwif_t *hwif = drive->hwif;
> +	u8 unit = (drive->select.b.unit & 0x01);

    Needless parens.

> +	u8 dma_stat = scc_ide_inb(hwif->dma_status);
> +
> +	if (on)
> +		dma_stat |= (1 << (5 + unit));

   Again...

MBR, Sergei
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