diff options
Diffstat (limited to 'drivers/crypto/atmel-aes.c')
| -rw-r--r-- | drivers/crypto/atmel-aes.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/crypto/atmel-aes.c b/drivers/crypto/atmel-aes.c index 245d45f93b61..b001fdcd9d95 100644 --- a/drivers/crypto/atmel-aes.c +++ b/drivers/crypto/atmel-aes.c @@ -120,7 +120,7 @@ struct atmel_aes_ctr_ctx { size_t offset; struct scatterlist src[2]; struct scatterlist dst[2]; - u16 blocks; + u32 blocks; }; struct atmel_aes_gcm_ctx { @@ -527,6 +527,12 @@ static void atmel_aes_ctr_update_req_iv(struct atmel_aes_dev *dd) unsigned int ivsize = crypto_skcipher_ivsize(skcipher); int i; + /* + * The CTR transfer works in fragments of data of maximum 1 MByte + * because of the 16 bit CTR counter embedded in the IP. When reaching + * here, ctx->blocks contains the number of blocks of the last fragment + * processed, there is no need to explicit cast it to u16. + */ for (i = 0; i < ctx->blocks; i++) crypto_inc((u8 *)ctx->iv, AES_BLOCK_SIZE); |