Re: 40-wire cable detected when directly connected

[Tejun Heo <htejun@gmail.com>]

Tobias Müller wrote:
> Hello!
> 
> I'm running 2.6.24-rc7 with an Addonics AD4CFPRJ Quad-CF PCI Controller 
> (http://www.addonics.com/products/flash_memory_reader/ad4cfprj.asp) using 
> Silicon Image PCI0680 chipset which is connected direct (no cables) with 2 
> Compact-Flash Cards.
> 
> In configured
> CONFIG_ATA=y
> CONFIG_PATA_SIL680=y
> 
> and the controller is correclty found, but it complains about 40-wire cables, 
> but I'm not using any cables
> at all.
> 
> Is there a solution to disable this check or to correct this?

The usual way to correct this is to add a whitelist to override cable
detection.  Laptops can be identified using dmi data and add-on cards
hopefully with subsystem.  Dang...  Addonics didn't set Subsystem.

I don't know very well about CF but does it even fill UDMA/33?  What
does 'dd if=/dev/sdc of=/dev/null bs=1M count=16 iflag=direct' say?  You
can increase count for more reliable result.

-- 
tejun