crypto: caam - update IV only when crypto operation succeeds

skcipher encryption might fail and in some cases, like (invalid) input
length smaller then block size, updating the IV would lead to a useless
IV copy in case hardware issued an error.

Signed-off-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Iuliana Prodan <iuliana.prodan@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/caam/caamalg_qi.c

@@ -1201,7 +1201,9 @@ static void skcipher_done(struct caam_drv_req *drv_req, u32 status)
 	 * ciphertext block (CBC mode) or last counter (CTR mode).
 	 * This is used e.g. by the CTS mode.
 	 */
-	memcpy(req->iv, (u8 *)&edesc->sgt[0] + edesc->qm_sg_bytes, ivsize);
+	if (!ecode)
+		memcpy(req->iv, (u8 *)&edesc->sgt[0] + edesc->qm_sg_bytes,
+		       ivsize);
 
 	qi_cache_free(edesc);
 	skcipher_request_complete(req, ecode);