linux-kernel - Re: [PATCH] pata_sl82c105: remove un-needed code paths

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Date:	Tue, 20 Feb 2007 11:54:08 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Alan <alan@...rguk.ukuu.org.uk>
CC:	linux-kernel@...r.kernel.org, akpm@...l.org
Subject: Re: [PATCH] pata_sl82c105: remove un-needed code paths

Alan wrote:
> Remove the DMA setup function. As pointed out by Sergey we set the actual
> DMA clock timing in set_dmamode so we don't actually need to do anything
> with it at set up time, but just leave the PIO timings loaded.
> 
> Signed-off-by: Alan Cox <alan@...hat.com>
> 
> diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.20-mm2/drivers/ata/pata_sl82c105.c linux-2.6.20-mm2/drivers/ata/pata_sl82c105.c
> --- linux.vanilla-2.6.20-mm2/drivers/ata/pata_sl82c105.c	2007-02-20 13:37:58.000000000 +0000
> +++ linux-2.6.20-mm2/drivers/ata/pata_sl82c105.c	2007-02-20 13:58:10.000000000 +0000
> @@ -7,6 +7,13 @@
>   * 		SL82C105/Winbond 553 IDE driver
>   *
>   * and in part on the documentation and errata sheet
> + *
> + *
> + * Note: The controller like many controllers has shared timings for
> + * PIO and DMA. We thus flip to the DMA timings in dma_start and flip back
> + * in the dma_stop function. Thus we actually don't need a set_dmamode
> + * method as the PIO method is always called and will set the right PIO
> + * timing parameters.
>   */
>  
>  #include <linux/kernel.h>
> @@ -19,7 +26,7 @@
>  #include <linux/libata.h>
>  
>  #define DRV_NAME "pata_sl82c105"
> -#define DRV_VERSION "0.2.3"
> +#define DRV_VERSION "0.2.5"

applied

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