linux-kernel - Re: [PATCH 13/18] ide: use ->tf_load in SELECT

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Date:	Sun, 15 Feb 2009 23:25:27 +0300
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 13/18] ide: use ->tf_load in SELECT_DRIVE()

Bartlomiej Zolnierkiewicz wrote:

> Convert SELECT_DRIVE() to use ->tf_load instead of ->OUTB.

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

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

> Index: b/drivers/ide/ide-iops.c
> ===================================================================
> --- a/drivers/ide/ide-iops.c
> +++ b/drivers/ide/ide-iops.c
> @@ -88,11 +88,15 @@ void SELECT_DRIVE (ide_drive_t *drive)
>  {
>  	ide_hwif_t *hwif = drive->hwif;
>  	const struct ide_port_ops *port_ops = hwif->port_ops;
> +	ide_task_t task;
>  
>  	if (port_ops && port_ops->selectproc)
>  		port_ops->selectproc(drive);
>  
> -	hwif->OUTB(drive->select.all, hwif->io_ports.device_addr);
> +	memset(&task, 0, sizeof(task));
> +	task.tf_flags = IDE_TFLAG_OUT_DEVICE;
> +
> +	drive->hwif->tf_load(drive, &task);

    This actually doesn't seem like a bright idea to me, considering that this 
gets called when starting every request. How will you look at me adding the 
transport method for writing this register? :-)

MBR, Sergei
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