[PATCH] radeon: Use mdelay() instead of msleep() in atom_op_delay().

[Daniel Vetter]

On Tue, Jan 03, 2012 at 07:16:25PM +0100, Michel Dänzer wrote:
> On Die, 2012-01-03 at 18:09 +0000, Dave Airlie wrote: 
> > 2012/1/3 Michel Dänzer <michel at daenzer.net>:
> > > From: Michel Dänzer <michel.daenzer at amd.com>
> > >
> > > It can be called from atomic context, e.g. when switching to console for panic
> > > output.
> > >
> > > Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=43941
> > 
> > I wonder how ugly it would be to check for atomic context or not,
> 
> So do I. :) The comment in include/linux/hardirq.h that ends in 'Do not
> use in_atomic() in driver code.' sounds rathery scary...

We already use in_atomic checks in similar delay code in drm/i915 for the
same reasons. I think the ugly mess that results from the panic notifier
calling into kms code is justification enough to neglect the the comment
about not using in_atomic in drivers.
-Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48