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Try to fix flash attention related issue on AMD. (#14880)

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comfyanonymous 2026-07-11 17:16:40 -07:00 committed by GitHub
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comfy/ldm/modules/attention.py
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@ -709,7 +709,7 @@ def attention3_sage(q, k, v, heads, mask=None, attn_precision=None, skip_reshape
return out
try:
@torch.library.custom_op("flash_attention::flash_attn", mutates_args=())
@torch.library.custom_op("comfy::flash_attn", mutates_args=())
def flash_attn_wrapper(q: torch.Tensor, k: torch.Tensor, v: torch.Tensor,
dropout_p: float = 0.0, causal: bool = False, softmax_scale: float = -1.0) -> torch.Tensor:
softmax_scale_arg = None if softmax_scale == -1.0 else softmax_scale