ahci cd0 issue

[Alexander Motin]

Andriy Gapon wrote:
> k3b did "something" to my cd0 while tasting it and after that IDE activity LED was
> constantly on and I got a never-ending stream of messages like the following:
> 
> ahcich5: Timeout on slot 25
> ahcich5: Timeout on slot 26
> ahcich5: Timeout on slot 29
> ahcich5: Timeout on slot 30
> ahcich5: Timeout on slot 1
> ahcich5: Timeout on slot 2
> ahcich5: Timeout on slot 5
> ahcich5: Timeout on slot 6
> ahcich5: Timeout on slot 9
> ahcich5: Timeout on slot 10
> ...
> and so on.
> cd0 is on ahcich5.
> 
> This is head r196558.

I don't know what initially caused the problem, but new ATA-CAM 
infrastructure is still lacks of proper timeout error recovery. It is 
not easy part, but I am working on it.

-- 
Alexander Motin