[NPU] Fix device mismatch in SWA mask for DSpark verify graph capture (#39353)

2026-09-14 19:36:33 +08:00
parent 66c7bc838e
commit 87db743021
1 changed files with 2 additions and 1 deletions
@@ -802,7 +802,8 @@ class AscendAttnBackend(AttentionBackend):
                and _is_dflash_verify(spec_info)
                and seq_lens_cpu is not None
            ):
-                seq_lens_int = seq_lens_cpu[:bs].int()
+                # seq_lens_cpu may be a CPU tensor; swa_indices is on-device.
+                seq_lens_int = seq_lens_cpu[:bs].int().to(self.device)
            else:
                seq_lens_int = seq_lens[:bs].int()
            starts = torch.clamp(seq_lens_int - self.sliding_window_size, min=0)