On Thu, Jul 03, 2014 at 08:09:41PM +0800, Kevin Hao wrote:
> The sata on fsl mpc8315e is broken after the commit 8a4aeec8d2d6
> ("libata/ahci: accommodate tag ordered controllers"). The reason is
> that the ata controller on this SoC only implement a queue depth of
> 16. When issuing the commands in tag order, all the commands in tag
> 16 ~ 17 are mapped to tag 0 unconditionally and then causes the sata
Shouldn't the function at least trigger WARN_ON_ONCE() if it's forcing
the tag to be 0 when it shouldn't be? Silently mapping things to zero
doesn't look like a particularly good idea.
Thanks.
--
tejun
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