linux-kernel - Re: No UDMA with BLK_DEV

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Message-Id: <200907221247.24090.bzolnier@gmail.com>
Date:	Wed, 22 Jul 2009 12:47:23 +0200
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	Dwayne Rightler <drightler@...hnicalogic.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: No UDMA with BLK_DEV_IT821X with 2.6.30.2

On Tuesday 21 July 2009 01:03:22 Dwayne Rightler wrote:
> Hello,
> 
> I have a ITE8212 PCI card and it does not seem to allow UDMA on the 
> drives attached.  The drives run at ATA100 under other controllers.
> 
> Dmesg:
> 
> [    3.029612] it821x 0000:01:07.0: IDE controller (0x1283:0x8212 rev 0x13)
> [    3.029835] ACPI: PCI Interrupt Link [APC4] enabled at IRQ 19
> [    3.029840] pci 0000:01:07.0: PCI INT A -> Link[APC4] -> GSI 19 
> (level, low) -> IRQ 19
> [    3.029847] it821x 0000:01:07.0: controller in smart mode

The controller is running in the "smart mode" in which it takes care
of setting the transfer speed (the driver reports standard MWDMA2 mode
to higher-layers for compatibility reasons).
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