[PATCH 3/3] crypto: arm64/aes-ccm - don't use an atomic walk needlessly

[Ard Biesheuvel]

When the AES-CCM code was first added, the NEON register were saved
and restored eagerly, and so the code avoided doing so, and executed
the scatterwalk in atomic context inside the kernel_neon_begin/end
section.

This has been changed in the meantime, so switch to non-atomic
scatterwalks.

Fixes: bd2ad885e30d ("crypto: arm64/aes-ce-ccm - move kernel mode neon ...")
Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
---
 arch/arm64/crypto/aes-ce-ccm-glue.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/crypto/aes-ce-ccm-glue.c 
b/arch/arm64/crypto/aes-ce-ccm-glue.c
index 986191e8c058..5fc6f51908fd 100644
--- a/arch/arm64/crypto/aes-ce-ccm-glue.c
+++ b/arch/arm64/crypto/aes-ce-ccm-glue.c
@@ -253,7 +253,7 @@ static int ccm_encrypt(struct aead_request *req)
        /* preserve the original iv for the final round */
        memcpy(buf, req->iv, AES_BLOCK_SIZE);
 
-       err = skcipher_walk_aead_encrypt(&walk, req, true);
+       err = skcipher_walk_aead_encrypt(&walk, req, false);
 
        if (may_use_simd()) {
                while (walk.nbytes) {
@@ -311,7 +311,7 @@ static int ccm_decrypt(struct aead_request *req)
        /* preserve the original iv for the final round */
        memcpy(buf, req->iv, AES_BLOCK_SIZE);
 
-       err = skcipher_walk_aead_decrypt(&walk, req, true);
+       err = skcipher_walk_aead_decrypt(&walk, req, false);
 
        if (may_use_simd()) {
                while (walk.nbytes) {
-- 
2.20.1