Re: BCM4312 Fails when xdm is started

[Michael Buesch <mb@bu3sch.de>]

On Friday 21 November 2008 17:25:22 Larry Finger wrote:
> A problem was recently posted to the bcm43xx mailing list that I am unable to
> solve. The machine in question is an HP Mini 2133 (HP product number FU346EA)
> with a BCM4312 PCIe wireless card. This card is known to work with the b43
> driver (I have one.) and it does work on this machine - at least initially.
> 
> A problem occurs when xdm/kde is started. Suddenly a read operation on device
> hardware returns all ones as though the register does not exist, or if it were
> suddenly mismapped. If the OP doesn't try to run xdm, the same problem will
> eventually occur, it just takes longer.

Can you dump PCI config space and SSB registers (TMSLOW, maybe others, too).
It looks like a random bus write disabled the device.

> [    0.000000] Zone PFN ranges:
> [    0.000000]   DMA      0x00000000 -> 0x00001000
> [    0.000000]   Normal   0x00001000 -> 0x000373fe
> [    0.000000]   HighMem  0x000373fe -> 0x0006feb0
> 
> On my 64-bit HP machine, I see:
> 
> Zone PFN ranges:
>   DMA      0x00000000 -> 0x00001000
>   DMA32    0x00001000 -> 0x00100000
>   Normal   0x00100000 -> 0x00100000
> 
> Is it "normal" for there not to be a DMA32 range with a 32-bit version of Linux?

Yeah, I think so.

-- 
Greetings Michael.