Re: earlyprintk=xdbc seems broken

[Greg KH]

On Fri, Dec 17, 2021 at 02:55:07PM +0100, Peter Zijlstra wrote:
> On Fri, Dec 17, 2021 at 01:01:43PM +0200, Mathias Nyman wrote:
> > I can reproduce this.
> > Looks like problems started when driver converted to readl_poll_timeout_atomic() in:
> > 
> > 796eed4b2342 usb: early: convert to readl_poll_timeout_atomic()
> 
> I can confirm, reverting that solves the boot hang, things aren't quite
> working for me though.
> 
> > Seems to hang when read_poll_timeout_atomic() calls ktime_* functions.
> > Maybe  it's too early for ktime.
> 
> It certainly is, using ktime for delay loops sounds daft to me anyhow.

It was a "find a pattern and replace it with a function call" type of
cleanup series.  It's obviously wrong, I will go revert it now.

thanks,

greg k-h