Fix incorrect attention mask truncate in WhisperFlashAttention2 #36477
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What does this PR do?
Fixes incorrect attention calculation when training Whisper with Flash Attention 2 and passing
decoder_attention_maskwith some values set toFalse.This error might've been made when copying the same truncating code from the other attention implementations. The problem is that in
WhisperFlashAttention2the dimensions have been transposed.cc @sanchit-gandhi @ylacombe