Re: [PATCH] aic94xx: fix smartctl utility problem

[Jeff Garzik <jeff@garzik.org>]

On Wed, Sep 05, 2007 at 03:25:55PM -0700, Gilbert Wu wrote:
>    Fixed the problem that "smartctl -a /dev/some_sata_disk -d ata"  does not work on SATA device.
>    ( The smartctl v5.38 does need "-d ata" option.)
>    The root cause is the aic94xx driver does not return ATA output register due to performance reason.
>    The aic94xx need check ATA command which need ATA output register and turn on internal flag to
>    enable firmware to return ATA output register to top layer.
>    It also add new ATA commands to ata.h sush as ATA_CMD_CHK_MEDIA_TYPE and ATA_CMD_SMART.
> 
> Signed-off-by: Gilbert Wu <gilbert_wu@adaptec.com>

All commands except for hot path READ/WRITE should be returning ATA
output registers.

Additionally, READ/WRITE should be returning ATA output registers,
if the READ/WRITE command did not succeed.

Any code that requires an "accepted list of commands" is problematic,
because it does not take into account vendor-specific commands.

	Jeff