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fix flux vae decoder failed when enable flash attention3 #122

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fix flux vae decoder failed when enable flash attention3 #122

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2 changes: 1 addition & 1 deletion diffsynth_engine/models/basic/attention.py
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Original file line number Diff line number Diff line change
Expand Up @@ -109,7 +109,7 @@ def attention(
"sparge_attn",
]
if attn_impl is None or attn_impl == "auto":
if FLASH_ATTN_3_AVAILABLE:
if FLASH_ATTN_3_AVAILABLE and q.shape[-1] <= 256:
return flash_attn3(q, k, v, softmax_scale=scale)
elif XFORMERS_AVAILABLE:
return xformers_attn(q, k, v, attn_mask=attn_mask, scale=scale)
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