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[Bug fix] Fix batch size attention head size mismatch #3214

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Merged
patrickvonplaten merged 1 commit into from
Apr 24, 2023
Merged

[Bug fix] Fix batch size attention head size mismatch #3214

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6 changes: 4 additions & 2 deletions src/diffusers/models/attention.py
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Original file line number Diff line number Diff line change
Expand Up @@ -86,8 +86,10 @@ def reshape_batch_dim_to_heads(self, tensor, unmerge_head_and_batch=True):
head_size = self.num_heads

if unmerge_head_and_batch:
batch_size, seq_len, dim = tensor.shape
tensor = tensor.reshape(batch_size // head_size, head_size, seq_len, dim)
batch_head_size, seq_len, dim = tensor.shape
batch_size = batch_head_size // head_size

tensor = tensor.reshape(batch_size, head_size, seq_len, dim)
else:
batch_size, _, seq_len, dim = tensor.shape

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