Bug#935753: Bug reported upstream

[Sven Joachim <svenjoac@gmx.de>]

Control: tags -1 - moreinfo
Control: tags -1 + fixed-upstream patch
Control: forwarded -1 https://gitlab.freedesktop.org/mesa/mesa/issues/1860

This has been reported and fixed upstream, patch from [1] attached here.

Cheers,
       Sven

1. https://gitlab.freedesktop.org/mesa/mesa/commit/1c6fdbc83cf1094c735b964902da421978005cb3

From 1c6fdbc83cf1094c735b964902da421978005cb3 Mon Sep 17 00:00:00 2001
From: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Date: Wed, 2 Oct 2019 17:13:06 +0300
Subject: [PATCH 1/1] intel: fix topology query

i915 will report ENODEV on generations prior to Haswell because there
is no point in reporting values on those. This is prior any fusing
could happen on parts with identical PCI ids.

This query call was previously only triggered on generations that
support performance queries, which happens to match generation for
which i915 reports topology, but the commit pointed below started
using it on all generations.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Gitlab: https://gitlab.freedesktop.org/mesa/mesa/issues/1860
Cc: <mesa-stable@lists.freedesktop.org>
Fixes: 96e1c945f2 ("i965: Move device info initialization to common code")
Reviewed-by: Mark Janes <mark.a.janes@intel.com>
---
 src/intel/dev/gen_device_info.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/intel/dev/gen_device_info.c b/src/intel/dev/gen_device_info.c
index 3953a1f4af3..85fa978f9c1 100644
--- a/src/intel/dev/gen_device_info.c
+++ b/src/intel/dev/gen_device_info.c
@@ -1320,6 +1320,9 @@ query_topology(struct gen_device_info *devinfo, int fd)
    if (gen_ioctl(fd, DRM_IOCTL_I915_QUERY, &query))
       return false;

+   if (item.length < 0)
+      return false;
+
    struct drm_i915_query_topology_info *topo_info =
       (struct drm_i915_query_topology_info *) calloc(1, item.length);
    item.data_ptr = (uintptr_t) topo_info;
--
2.23.0