Hi, AES_REG_IV() registers should be read back at the end of encryption or decryption operations and the values returned to the caller. Add the code and helper to do just that. diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c index 49bd56f..744885b 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -97,6 +97,13 @@ static void omap_aes_write_n(struct omap_aes_dev *dd, u32 offset, omap_aes_write(dd, offset, *value); } +static void omap_aes_read_n(struct omap_aes_dev *dd, u32 offset, + u32 *value, int count) +{ + for (; count--; value++, offset += 4) + *value = omap_aes_read(dd, offset); +} + static int omap_aes_hw_init(struct omap_aes_dev *dd) { int err; @@ -389,6 +396,9 @@ static void omap_aes_finish_req(struct omap_aes_dev *dd, int err) pr_debug("err: %d\n", err); + if ((dd->flags & (FLAGS_CBC | FLAGS_CTR)) && dd->req->info) + omap_aes_read_n(dd, AES_REG_IV(dd, 0), dd->req->info, 4); + crypto_finalize_cipher_request(dd->engine, req, err);