linux-kernel - Re: [PATCH] libata: fix for transport xfer attributes

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Message-ID: <4E9762DE.1060009@pobox.com>
Date:	Thu, 13 Oct 2011 18:14:54 -0400
From:	Jeff Garzik <jgarzik@...ox.com>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
CC:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] libata: fix for transport xfer attributes

On 10/13/2011 04:03 PM, Bartlomiej Zolnierkiewicz wrote:
> From: Bartlomiej Zolnierkiewicz<bzolnier@...il.com>
> Subject: [PATCH] libata: fix for transport xfer attributes
>
> Fix display of pio_mode, dma_mode and xfer_mode device attributes.
>
> before:
> $ cat /sys/class/ata_device/dev1.0/xfer_mode
> XFER_UDMA_7, XFER_UDMA_6, XFER_UDMA_5, XFER_UDMA_4, XFER_UDMA_3, XFER_UDMA_2, XF
> ER_UDMA_1, XFER_UDMA_0, XFER_MW_DMA_4, XFER_MW_DMA_3, XFER_MW_DMA_2, XFER_SW_DMA
> _2, XFER_PIO_6, XFER_PIO_5, XFER_PIO_4, XFER_PIO_3, XFER_PIO_2
>
> after:
> $ cat /sys/class/ata_device/dev1.0/xfer_mode
> XFER_UDMA_6
>
> Signed-off-by: Bartlomiej Zolnierkiewicz<bzolnier@...il.com>
> ---
>   Documentation/ABI/testing/sysfs-ata |    4 ++--
>   drivers/ata/libata-transport.c      |    2 +-
>   2 files changed, 3 insertions(+), 3 deletions(-)
>
> Index: b/Documentation/ABI/testing/sysfs-ata
> ===================================================================
> --- a/Documentation/ABI/testing/sysfs-ata
> +++ b/Documentation/ABI/testing/sysfs-ata
> @@ -59,12 +59,12 @@ class
>
>   dma_mode
>
> -	Transfer modes supported by the device when in DMA mode.
> +	Transfer mode currently used by the device when in DMA mode.
>   	Mostly used by PATA device.
>
>   pio_mode
>
> -	Transfer modes supported by the device when in PIO mode.
> +	Transfer mode currently used by the device when in PIO mode.
>   	Mostly used by PATA device.
>
>   xfer_mode
> Index: b/drivers/ata/libata-transport.c
> ===================================================================
> --- a/drivers/ata/libata-transport.c
> +++ b/drivers/ata/libata-transport.c
> @@ -194,7 +194,7 @@ static struct {
>   	{ XFER_PIO_0,			"XFER_PIO_0" },
>   	{ XFER_PIO_SLOW,		"XFER_PIO_SLOW" }
>   };
> -ata_bitfield_name_match(xfer,ata_xfer_names)
> +ata_bitfield_name_search(xfer, ata_xfer_names)

"fix" or not it is an ABI change... who is impacted?  Has anyone used 
the current, pre-patch behavior as documented?

	Jeff




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