[Mesa-dev] [PATCH v2 2/2] st/dri2: Return invalid modifier when no driver support

[Daniel Stone]

Always initialise whandle.modifier for DRIImage modifier queries, so if
the driver doesn't support it then we return false for the query.

Signed-off-by: Daniel Stone <daniels at collabora.com>
Cc: Varad Gautam <varad.gautam at collabora.com>
Fixes: d33fe8b84e45 ("st/dri: enable DRIimage modifier queries")
---
 src/gallium/state_trackers/dri/dri2.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/gallium/state_trackers/dri/dri2.c b/src/gallium/state_trackers/dri/dri2.c
index 151fa5312a..688db8835b 100644
--- a/src/gallium/state_trackers/dri/dri2.c
+++ b/src/gallium/state_trackers/dri/dri2.c
@@ -1239,14 +1239,20 @@ dri2_query_image(__DRIimage *image, int attrib, int *value)
       return GL_TRUE;
    case __DRI_IMAGE_ATTRIB_MODIFIER_UPPER:
       whandle.type = DRM_API_HANDLE_TYPE_KMS;
+      whandle.modifier = DRM_FORMAT_MOD_INVALID;
       if (!image->texture->screen->resource_get_handle(image->texture->screen,
             NULL, image->texture, &whandle, usage))
+      if (whandle.modifier == DRM_FORMAT_MOD_INVALID)
+         return GL_FALSE;
       *value = (whandle.modifier >> 32) & 0xffffffff;
       return GL_TRUE;
    case __DRI_IMAGE_ATTRIB_MODIFIER_LOWER:
       whandle.type = DRM_API_HANDLE_TYPE_KMS;
+      whandle.modifier = DRM_FORMAT_MOD_INVALID;
       if (!image->texture->screen->resource_get_handle(image->texture->screen,
             NULL, image->texture, &whandle, usage))
+      if (whandle.modifier == DRM_FORMAT_MOD_INVALID)
+         return GL_FALSE;
       *value = whandle.modifier & 0xffffffff;
       return GL_TRUE;
    default:
-- 
2.13.2