Mesa (main): gallium/hud: initialize query

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Module: Mesa
Branch: main
Commit: 10541d1fade07e57441b591a36b0bf02f5eca299
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=10541d1fade07e57441b591a36b0bf02f5eca299

Author: Juan A. Suarez Romero <jasuarez at igalia.com>
Date:   Tue Aug  3 13:05:23 2021 +0200

gallium/hud: initialize query

Most of the drivers don't set up the maximum value in the query info. So
when later hud_pane_set_max_value() is invoked, we are using a rather
"random" number.

Turns out that in some 32bit cases, this random number is big enough
that `leftmost_digit` is 0 because DIV_ROUND_UP() overflows, aborting
with an assertion.

Fixes: c91cf7d7d2c ("gallium: implement a heads-up display module")
Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz at gmail.com>
Signed-off-by: Juan A. Suarez Romero <jasuarez at igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12181>

---

 src/gallium/auxiliary/hud/hud_driver_query.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gallium/auxiliary/hud/hud_driver_query.c b/src/gallium/auxiliary/hud/hud_driver_query.c
index 382de1af028..f15c7104460 100644
--- a/src/gallium/auxiliary/hud/hud_driver_query.c
+++ b/src/gallium/auxiliary/hud/hud_driver_query.c
@@ -424,7 +424,7 @@ hud_driver_query_install(struct hud_batch_query_context **pbq,
                          struct hud_pane *pane, struct pipe_screen *screen,
                          const char *name)
 {
-   struct pipe_driver_query_info query;
+   struct pipe_driver_query_info query = { 0 };
    unsigned num_queries, i;
    boolean found = FALSE;