drm/amdkfd: fix loop error handling

Clang static analysis reports this problem
kfd_chardev.c:2594:16: warning: The expression is an uninitialized value.
  The computed value will also be garbage
        while (ret && i--) {
                      ^~~

i is a loop variable and this block unwinds a problem in the loop.
When the error happens before the loop, this value is garbage.
Move the initialization of i to its decalaration.

Fixes: be072b0 ("drm/amdkfd: CRIU export BOs as prime dmabuf objects")
Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdkfd/kfd_chardev.c

@@ -2100,7 +2100,7 @@ static int criu_restore_bos(struct kfd_process *p,
 	const bool criu_resume = true;
 	bool flush_tlbs = false;
 	int ret = 0, j = 0;
-	uint32_t i;
+	uint32_t i = 0;
 
 	if (*priv_offset + (args->num_bos * sizeof(*bo_privs)) > max_priv_data_size)
 		return -EINVAL;
@@ -2136,7 +2136,7 @@ static int criu_restore_bos(struct kfd_process *p,
 	*priv_offset += args->num_bos * sizeof(*bo_privs);
 
 	/* Create and map new BOs */
-	for (i = 0; i < args->num_bos; i++) {
+	for (; i < args->num_bos; i++) {
 		struct kfd_criu_bo_bucket *bo_bucket;
 		struct kfd_criu_bo_priv_data *bo_priv;
 		struct kfd_dev *dev;