Re: [PATCH 0/2] fix libata-sff and pata_cmd64x to not crash on boot on parisc

[Sergei Shtylyov <sshtylyov@mvista.com>]

Hello.

On 19-04-2011 1:20, Alan Cox wrote:

>> +	}
>> +	if (!(reg&  ENPORT_SECONDARY)) {
>> +		dev_printk(KERN_NOTICE,&pdev->dev, "Secondary port is disabled\n");
>> +		ppi[1] =&ata_dummy_port_info;
>> +	}

> And you just broke split bridge setups. Also need to check if the bits
> are valid for this chipset in native mode officialy - Sergei probably
> knows the answer to that.

    The PCI-649 spec. doesn't say anything about legacy/native mode WRT the 
channel enable bits.

> We can detect the Mobility electronics split bridges at least (and I
> suspect they are the only 'common' CMD64x hot plug device indeed possibly
> the only one) because the parent bridge of the CMD64x will have a PCI
> vendor id of 0x14f2 and a device id 0x0001, 0x0002, or 0x0120.

    What's the issue with these brodges anyway? Why the enable bits are not 
valid for them?

WBR, Sergei