drm/edid: don't return stack garbage from supports_rb

commit b196a4980ff7bb54db478e2a408dc8b12be15304 upstream.

We need to initialize this to false, because the is_rb callback only
ever sets it to true.

Noticed while reading through the code.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 5a18b0df82850a046608c57c7fedb4cf75d03e4b..6e38325d04a60123ad9b729aa8ca9e4411261894 100644 (file)
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -574,7 +574,7 @@ static bool
 drm_monitor_supports_rb(struct edid *edid)
 {
        if (edid->revision >= 4) {
-               bool ret;
+               bool ret = false;
                drm_for_each_detailed_block((u8 *)edid, is_rb, &ret);
                return ret;
        }