From e198429c41edaeaf5e1e2e2ef4bb5a476d8bf399 Mon Sep 17 00:00:00 2001
From: Tudor-Dan Ambarus <tudor.ambarus@microchip.com>
Date: Thu, 25 May 2017 10:18:14 +0300
Subject: [PATCH] crypto: caampkc - comply with crypto_akcipher_maxsize()
Git-commit: e198429c41edaeaf5e1e2e2ef4bb5a476d8bf399
References: FATE#326323
Patch-mainline: v4.13

crypto_akcipher_maxsize() asks for the output buffer size without
caring for errors. It allways assume that will be called after
a valid setkey. Comply with it and return what he wants.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
 drivers/crypto/caam/caampkc.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c
index 57f399caa977..9c508ba6b0f1 100644
--- a/drivers/crypto/caam/caampkc.c
+++ b/drivers/crypto/caam/caampkc.c
@@ -911,12 +911,11 @@ static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
 	return -ENOMEM;
 }
 
-static int caam_rsa_max_size(struct crypto_akcipher *tfm)
+static unsigned int caam_rsa_max_size(struct crypto_akcipher *tfm)
 {
 	struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm);
-	struct caam_rsa_key *key = &ctx->key;
 
-	return (key->n) ? key->n_sz : -EINVAL;
+	return ctx->key.n_sz;
 }
 
 /* Per session pkc's driver context creation function */
-- 
2.16.4