Re: [RFC PATCH] xhci: do not halt the secondary HCD

From: Greg KH
Date: Mon Sep 19 2016 - 03:03:53 EST

On Mon, Sep 19, 2016 at 04:05:45PM +0930, Joel Stanley wrote:
> We can't halt the secondary HCD, because it's also the primary HCD,
> which will cause problems if we have devices attached to the primary
> HCD, like a keyboard.
> We've been carrying this in our Linux-as-a-bootloader environment for a little
> while now. The machines all have the same TI TUSB73x0 part, and when we kexec
> the devices don't come back until a system power cycle.
> I'd like some advice on an acceptable way to upstream the fix, so that the xhci
> device survives kexec.

Any reason you didn't cc: Mathias?

And have you tried 4.8-rc kernels? I thought we just fixed an issue
around secondary HCDs...


greg k-h