[PATCH v3 1/3] drm/xe: Standardize pat_index to u16 type

[Xin Wang <x.wang@intel.com>]

Ensure all pat_index definitions consistently use u16 type across
the XE driver. This addresses two remaining instances where pat_index
was incorrectly typed:

- xe_vm_snapshot structure used int for pat_index field
- xe_device pat.idx array used u32 instead of u16

This cleanup improves type consistency and ensures proper alignment
with the PAT subsystem design.

Signed-off-by: Xin Wang <x.wang@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
---
 drivers/gpu/drm/xe/xe_device_types.h | 2 +-
 drivers/gpu/drm/xe/xe_vm.c           | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
index 150c76b2acaf..51af55020ae0 100644
--- a/drivers/gpu/drm/xe/xe_device_types.h
+++ b/drivers/gpu/drm/xe/xe_device_types.h
@@ -403,7 +403,7 @@ struct xe_device {
 		const struct xe_pat_table_entry *pat_primary_pta;
 		/** @pat.pat_media_pta: media GT PAT entry for page table accesses */
 		const struct xe_pat_table_entry *pat_media_pta;
-		u32 idx[__XE_CACHE_LEVEL_COUNT];
+		u16 idx[__XE_CACHE_LEVEL_COUNT];
 	} pat;
 
 	/** @d3cold: Encapsulate d3cold related stuff */
diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index 2408b547ca3d..f97c7af2f17c 100644
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -4407,7 +4407,7 @@ struct xe_vm_snapshot {
 #define XE_VM_SNAP_FLAG_IS_NULL		BIT(2)
 		unsigned long flags;
 		int uapi_mem_region;
-		int pat_index;
+		u16 pat_index;
 		int cpu_caching;
 		struct xe_bo *bo;
 		void *data;
-- 
2.43.0