On Thu, 16 Jul 2015, Damien Lespiau <damien.lespiau@xxxxxxxxx> wrote: > On Thu, Jul 16, 2015 at 07:36:51PM +0300, Mika Kuoppala wrote: >> Fix divide by zero if we end up updating the watermarks >> with zero dotclock. >> >> This is a stop gap measure to allow module load in cases >> where our state keeping fails. >> >> v2: WARN_ON added (Paulo) >> >> Cc: Paulo Zanoni <przanoni@xxxxxxxxx> >> Cc: Damien Lespiau <damien.lespiau@xxxxxxxxx> >> Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx> > > I want to say a loading module is more important than a proper fix, so: Any ideas on the proper fix? Patches on the list, sketches on a post-it, anything? I've got a machine here hitting this. BR, Jani. > > Reviewed-by: Damien Lespiau <damien.lespiau@xxxxxxxxx> > > -- > Damien > >> --- >> drivers/gpu/drm/i915/intel_pm.c | 4 +++- >> 1 file changed, 3 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c >> index 5eeddc9..0d3e014 100644 >> --- a/drivers/gpu/drm/i915/intel_pm.c >> +++ b/drivers/gpu/drm/i915/intel_pm.c >> @@ -3316,8 +3316,10 @@ skl_compute_linetime_wm(struct drm_crtc *crtc, struct skl_pipe_wm_parameters *p) >> if (!to_intel_crtc(crtc)->active) >> return 0; >> >> - return DIV_ROUND_UP(8 * p->pipe_htotal * 1000, p->pixel_rate); >> + if (WARN_ON(p->pixel_rate == 0)) >> + return 0; >> >> + return DIV_ROUND_UP(8 * p->pipe_htotal * 1000, p->pixel_rate); >> } >> >> static void skl_compute_transition_wm(struct drm_crtc *crtc, >> -- >> 2.1.4 >> > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Jani Nikula, Intel Open Source Technology Center _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
