2015-07-16 13:36 GMT-03:00 Mika Kuoppala <mika.kuoppala@xxxxxxxxxxxxxxx>: > 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) Since we're not hiding the problem (due to the WARN_ON) and the patch improves the current situation: Reviewed-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx> > > Cc: Paulo Zanoni <przanoni@xxxxxxxxx> > Cc: Damien Lespiau <damien.lespiau@xxxxxxxxx> > Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx> > --- > 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 > -- Paulo Zanoni _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
