Re: PNP BIOS and parport_pc - dma found but not used

[Gunther Mayer]

Pavel Roskin wrote:
> 
> Hello!
> 
> I've compiled 2.4.3-ac9 with support for PNP BIOS. I understand that this
> is a new feature experimental and the feedback is requested.
> 
> The setting is BIOS is to use irq 7 and dma 3. I normally use "options
> parport_pc io=0x378 irq=7 dma=3" in /etc/modules.conf, but this time I
> commented them out hoping that the driver will ask BIOS.
> 
> Although the kernel can see those settings, the dma is not used by the
> driver. This is the output from dmesg.
> 
> PnPBIOS: Parport found PNPBIOS PNP0401 at io=0378,0778 irq=7 dma=-1
                                                               ^^^^^^ culprit !

Send me the raw PNP resource data so I can look into this:

1) Search for the right two-digit PNP handle for device "0104d041":
   cat /proc/bus/pnb/devices
   01      0104d041        07:01:00        0080
   02      0105d041        07:00:02        0180
   03      1005d041        07:00:02        0180
   04      0007d041        01:02:00        0003
   ...

   The number in the first column (here: 01) is the handle
   to be used in step 2.

2) Send cat /proc/bus/pnp/01 | od -tx1