On Tue, 2019-01-22 at 21:09 +0200, Ville Syrjälä wrote: > On Tue, Jan 22, 2019 at 08:09:40PM +0200, Jani Nikula wrote: > > On Tue, 22 Jan 2019, Ville Syrjälä <ville.syrj...@linux.intel.com> > > wrote: > > > On Tue, Jan 22, 2019 at 02:58:24PM +0200, Mika Kahola wrote: > > > > Avoid divide by zero warning on static analysis. > > > > > > > > Signed-off-by: Mika Kahola <mika.kah...@intel.com> > > > > --- > > > > drivers/gpu/drm/i915/intel_pm.c | 6 ++++-- > > > > 1 file changed, 4 insertions(+), 2 deletions(-) > > > > > > > > diff --git a/drivers/gpu/drm/i915/intel_pm.c > > > > b/drivers/gpu/drm/i915/intel_pm.c > > > > index 8b63afa3a221..6a8e8b3f44c2 100644 > > > > --- a/drivers/gpu/drm/i915/intel_pm.c > > > > +++ b/drivers/gpu/drm/i915/intel_pm.c > > > > @@ -3912,8 +3912,10 @@ > > > > skl_ddb_get_pipe_allocation_limits(struct drm_i915_private > > > > *dev_priv, > > > > pipe_width = hdisplay; > > > > } > > > > > > > > - alloc->start = ddb_size * width_before_pipe / > > > > total_width; > > > > - alloc->end = ddb_size * (width_before_pipe + > > > > pipe_width) / total_width; > > > > + alloc->start = total_width == 0 ? > > > > + 0 : ddb_size * width_before_pipe / total_width; > > > > + alloc->end = total_width == 0 ? > > > > + 0 : ddb_size * (width_before_pipe + pipe_width) > > > > / total_width; > > > > > > Can't happen. I'd say it's very unlikely to happen but in theory possible. If we don't have any crtc_state enabled we end up having total_width = 0. In this case it probably won't matter what numbers we end up with alloc- >start and alloc->end.
Anyway, this was something that caught my eye while looking into crc mismatch errors and static checker results. Like Jani said, warn is sufficient with this case. Cheers, Mika > > > > Yeah, it's about stfu the checker... > > Feels like the tip of an iceberg. How many more uglies are we going > to > have to add? > > > > > > > > > > } > > > > > > > > static unsigned int skl_cursor_allocation(int num_active) > > > > -- > > > > 2.17.1 > > > > > > > > _______________________________________________ > > > > Intel-gfx mailing list > > > > Intel-gfx@lists.freedesktop.org > > > > https://lists.freedesktop.org/mailman/listinfo/intel-gfx > > > > -- > > Jani Nikula, Intel Open Source Graphics Center > > _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
