Re: Regression in 4.11 - PowerPC crashes on boot, bisected to commit 5657933dbb6e

[Benjamin Herrenschmidt]

On Wed, 2017-03-01 at 21:26 -0600, Larry Finger wrote:
> My Powerbook G4 Aluminum generates a fatal splat early in the boot process, justÂ
> after identifying the driver for the disk. Unfortunately, it turns off almostÂ
> immediately, thus I cannot report the message. After this bug has beenÂ
> triggered, the system clock has been reset to Dec. 31, 1969. I assume this is aÂ
> side effect of an uncontrolled DMA operation.
> 
> This problem has been bisected to commit 5657933dbb6e ("treewide: Move dma_opsÂ
> from struct dev_archdata into struct device").

Side effect of a crash during boot... the PMU gets upset when we crash while
there's a request in flight, that's probably what is happening.

As to why that commit is broken, I don't have time to look into it right  now,
maybe next week of nobody beats me to it.

Cheers,
Ben.