[PATCH 4.15 044/163] crypto: sun4i_ss_prng - fix return value of sun4i_ss_prng_generate

[Greg Kroah-Hartman]

4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Artem Savkov <artem.savkov@xxxxxxxxx>

commit dd78c832ffaf86eb6434e56de4bc3bc31f03f771 upstream.

According to crypto/rng.h generate function should return 0 on success
and < 0 on error.

Fixes: b8ae5c7387ad ("crypto: sun4i-ss - support the Security System PRNG")
Signed-off-by: Artem Savkov <artem.savkov@xxxxxxxxx>
Acked-by: Corentin Labbe <clabbe.montjoie@xxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/crypto/sunxi-ss/sun4i-ss-prng.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/crypto/sunxi-ss/sun4i-ss-prng.c
+++ b/drivers/crypto/sunxi-ss/sun4i-ss-prng.c
@@ -52,5 +52,5 @@ int sun4i_ss_prng_generate(struct crypto
 
 	writel(0, ss->base + SS_CTL);
 	spin_unlock(&ss->slock);
-	return dlen;
+	return 0;
 }