drm/xe: Fix loop in vm_bind_ioctl_ops_unwind

The logic for the unwind loop is incorrect resulting in an infinite
loop. Fix to unwind to go from the last operations list to he first.

Fixes: 617eebb9c480 ("drm/xe: Fix array of binds")
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240201175532.2303168-1-matthew.brost@intel.com
(cherry picked from commit 3acc1ff1a72fce00cdbd3ef1c27108a967fd5616)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c
index 30db264..d45cbf7 100644 (file)
--- a/drivers/gpu/drm/xe/xe_vm.c
+++ b/drivers/gpu/drm/xe/xe_vm.c
@@ -2669,7 +2669,7 @@ static void vm_bind_ioctl_ops_unwind(struct xe_vm *vm,
 {
        int i;
 
-       for (i = num_ops_list - 1; i; ++i) {
+       for (i = num_ops_list - 1; i >= 0; --i) {
                struct drm_gpuva_ops *__ops = ops[i];
                struct drm_gpuva_op *__op;