[PATCH 1/3] drm/xe: Fix out-of-bounds warning in vm_bind_ioctl_check_args

[Nirmoy Das]

Modify how bind_ops is assigned and used within the for loop to
accommodate both array and single bind scenarios which should prevent
out-of-bounds access warning from static code analysis tool.

Cc: Matthew Auld <matthew.auld at intel.com>
Signed-off-by: Nirmoy Das <nirmoy.das at intel.com>
---
 drivers/gpu/drm/xe/xe_vm.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index cbb9b8935c90..0b742d8d82a5 100644
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -2839,15 +2839,16 @@ static int vm_bind_ioctl_check_args(struct xe_device *xe,
 	}
 
 	for (i = 0; i < args->num_binds; ++i) {
-		u64 range = (*bind_ops)[i].range;
-		u64 addr = (*bind_ops)[i].addr;
-		u32 op = (*bind_ops)[i].op;
-		u32 flags = (*bind_ops)[i].flags;
-		u32 obj = (*bind_ops)[i].obj;
-		u64 obj_offset = (*bind_ops)[i].obj_offset;
-		u32 prefetch_region = (*bind_ops)[i].prefetch_mem_region_instance;
+		struct drm_xe_vm_bind_op *cur_ops = &(*bind_ops)[i];
+		u64 range = cur_ops->range;
+		u64 addr = cur_ops->addr;
+		u32 op = cur_ops->op;
+		u32 flags = cur_ops->flags;
+		u32 obj = cur_ops->obj;
+		u64 obj_offset = cur_ops->obj_offset;
+		u32 prefetch_region = cur_ops->prefetch_mem_region_instance;
 		bool is_null = flags & DRM_XE_VM_BIND_FLAG_NULL;
-		u16 pat_index = (*bind_ops)[i].pat_index;
+		u16 pat_index = cur_ops->pat_index;
 		u16 coh_mode;
 
 		if (XE_IOCTL_DBG(xe, pat_index >= xe->pat.n_entries)) {
@@ -2856,7 +2857,7 @@ static int vm_bind_ioctl_check_args(struct xe_device *xe,
 		}
 
 		pat_index = array_index_nospec(pat_index, xe->pat.n_entries);
-		(*bind_ops)[i].pat_index = pat_index;
+		cur_ops->pat_index = pat_index;
 		coh_mode = xe_pat_index_get_coh_mode(xe, pat_index);
 		if (XE_IOCTL_DBG(xe, !coh_mode)) { /* hw reserved */
 			err = -EINVAL;
-- 
2.42.0