drm/i915: Don't use uninitialized 'ret'

Accidentally removed the 'ret=0' initialization, and thus
we're potentially looking at some stack garbage here.

The whole 'ret = do_stuff; if (!ret) do_other_stuff;' pattern
confuses my brain so let's replace it with the standard
immediate return thing.

Reported-by: Chris Wilson <chris@chris-wilson.co.uk>
Fixes: 28a30b45f5e9 ("drm/i915: Convert cdclk to global state")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200207152228.1054-1-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 80eebdc..61ba1f2 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -12843,11 +12843,13 @@ static int intel_crtc_atomic_check(struct intel_atomic_state *state,
        }
 
        if (INTEL_GEN(dev_priv) >= 9) {
-               if (mode_changed || crtc_state->update_pipe)
+               if (mode_changed || crtc_state->update_pipe) {
                        ret = skl_update_scaler_crtc(crtc_state);
-               if (!ret)
-                       ret = intel_atomic_setup_scalers(dev_priv, crtc,
-                                                        crtc_state);
+                       if (ret)
+                               return ret;
+               }
+
+               ret = intel_atomic_setup_scalers(dev_priv, crtc, crtc_state);
                if (ret)
                        return ret;
        }