[i-g-t] lib/xe: set hwconfig NULL for unsupported platforms

[Tejas Upadhyay <tejas.upadhyay@intel.com>]

There are hardware platforms which are not supporting
hwconfig table, for example ADLS. Querying hwconfig
on unsupported platforms leads to assert and failure
for some of tests like,
./build/tests/xe_module_load --r load

https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/3683

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Jan Maslak <jan.maslak@intel.com>
Fixes: 37a230e50 ("lib/xe_query: add hwconfig to xe_device")
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
---
 lib/xe/xe_query.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/xe/xe_query.c b/lib/xe/xe_query.c
index f3731d9d3..8f0a5392c 100644
--- a/lib/xe/xe_query.c
+++ b/lib/xe/xe_query.c
@@ -51,7 +51,8 @@ static uint32_t *xe_query_hwconfig_new(int fd, uint32_t *hwconfig_size)
 
 	/* Perform the initial query to get the size */
 	igt_assert_eq(igt_ioctl(fd, DRM_IOCTL_XE_DEVICE_QUERY, &query), 0);
-	igt_assert_neq(query.size, 0);
+	if (!query.size)
+		return NULL;
 
 	hwconfig = malloc(query.size);
 	igt_assert(hwconfig);
@@ -858,7 +859,8 @@ uint32_t *xe_hwconfig_lookup_value(int fd, enum intel_hwconfig attribute, uint32
 	igt_assert(xe_dev);
 
 	hwconfig = xe_dev->hwconfig;
-	igt_assert(hwconfig);
+	if (!hwconfig)
+		return NULL;
 
 	/* Extract the value from the hwconfig */
 	pos = 0;
-- 
2.34.1