Pack of CAM improvements

[Yamagi Burmeister]

On Tue, 19 Jan 2010, Alexander Motin wrote:

> Hi.
>
> I've made a patch, that should solve set of problems of CAM ATA and CAM
> generally. I would like to ask for testing and feedback.

[snip]

Hello,
applied this patch to 8-stable recompiled the kernel and rebooted. The
kernel did not boot it hangs while probing the ahci-controller. The
error message is:

  ahcich0: Timeout on slot 0
  ahcich0: is 00000002 cs 00000000 ss 000000000 rs 00000001 tfs 50 serr
  00000000
  run_interrupt_driven_hooks: still waiting after 60 seconds for xpt_config

After that the kernel hangs forever. A 8-stable without the patch shows

  ahcich0: Timeout on slot 0
  run_interrupt_driven_hooks: still waiting after 60 seconds for xpt_config

and boots but doesn't find any hard disks. It's an Asus M3A-H/HDMI
motherboard with AMD SB710 southbridge. The harddisk is an Western
Digital WD10EAVS. Both are working with the old ata implementation in
AHCI mode. pciconf output of the controller is

  atapci0 at pci0:0:17:0: class=0x010601 card=0x43911002 chip=0x43911002
  rev=0x00 hdr=0x00

Thanks,
   Yamagi

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