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Vinicius Costa Gomes
94a2593047
On a hardware analytics error, decompress retries through the software
fallback, which writes req->dst with the CPU while it is still mapped
DMA_FROM_DEVICE. With SWIOTLB active the later dma_unmap_sg() copies the
stale bounce buffer over req->dst, corrupting the result.
Unmap before the fallback runs. The async path unmaps inline; the sync
path signals the retry with -EAGAIN so iaa_comp_adecompress() runs the
fallback after unmapping.
Fixes: 2ec6761df8 ("crypto: iaa - Add support for deflate-iaa compression algorithm")
Cc: [email protected]
Signed-off-by: Vinicius Costa Gomes <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>