Virtualization - Mar 2021 - [PATCH] qxl: Fix uninitialised struct field head.surface_id

From: Colin Ian King <colin.king at canonical.com>

The surface_id struct field in head is not being initialized and
static analysis warns that this is being passed through to
dev->monitors_config->heads[i] on an assignment. Clear up this
warning by initializing it to zero.

Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: a6d3c4d79822 ("qxl: hook monitors_config updates into crtc, not
encoder.")
Signed-off-by: Colin Ian King <colin.king at canonical.com>
---
 drivers/gpu/drm/qxl/qxl_display.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/qxl/qxl_display.c
b/drivers/gpu/drm/qxl/qxl_display.c
index 012bce0cdb65..10738e04c09b 100644
--- a/drivers/gpu/drm/qxl/qxl_display.c
+++ b/drivers/gpu/drm/qxl/qxl_display.c
@@ -328,6 +328,7 @@ static void qxl_crtc_update_monitors_config(struct drm_crtc
*crtc,
 
 	head.id = i;
 	head.flags = 0;
+	head.surface_id = 0;
 	oldcount = qdev->monitors_config->count;
 	if (crtc->state->active) {
 		struct drm_display_mode *mode = &crtc->mode;
-- 
2.30.0

On Thu, Mar 04, 2021 at 09:49:28AM +0000, Colin King
wrote:
> From: Colin Ian King <colin.king at canonical.com>
> 
> The surface_id struct field in head is not being initialized and
> static analysis warns that this is being passed through to
> dev->monitors_config->heads[i] on an assignment. Clear up this
> warning by initializing it to zero.
> 
> Addresses-Coverity: ("Uninitialized scalar variable")
> Fixes: a6d3c4d79822 ("qxl: hook monitors_config updates into crtc, not
encoder.")
> Signed-off-by: Colin Ian King <colin.king at canonical.com>
Pushed to drm-misc-fixes.

thanks,
  Gerd