[PATCH 0/2] crypto: caam - Fix rsa-caam unmap and DMA alignment

[Changwei Zou]

This series fixes two issues in the rsa-caam driver.

The first patch fixes incorrect unmap operations in akcipher_do_one_req()
and akcipher_enqueue_req(), where rsa_pub_unmap() was called regardless
of the key type.

The second patch fixes an intermittent -EKEYREJECTED error observed on
i.MX8 when loading signed kernel modules. The root cause is that the
rsa-caam driver DMA-maps the destination buffer directly without checking
cacheline alignment. On non-coherent DMA systems this can corrupt
adjacent memory. A bounce buffer is introduced for destination buffers
that are not cacheline-aligned.

Changwei Zou (2):
  crypto: caam - Fix wrong unmap operations
  crypto: caam - Use bounce buffer for unaligned RSA destination buffers

 drivers/crypto/caam/caampkc.c | 120 ++++++++++++++++++++++++++++++----
 drivers/crypto/caam/caampkc.h |   6 ++
 2 files changed, 113 insertions(+), 13 deletions(-)

-- 
2.43.0