s390/crypto: avoid returning garbage value

Static analysis with cppcheck detected that ret is not initialized
and hence garbage is potentially being returned in the case where
prng_data->ppnows.reseed_counter <= prng_reseed_limit.

Thanks to Martin Schwidefsky for spotting a mistake in my original
fix.

Fixes: 0177db01adf26cf9 ("s390/crypto: simplify return code handling")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/crypto/prng.c b/arch/s390/crypto/prng.c
index 79e3a1f6313a2516ed829eccdc1dba7f0e1b655f..9cc050f9536c10f1658472c132e5ac41c13db4fe 100644 (file)
--- a/arch/s390/crypto/prng.c
+++ b/arch/s390/crypto/prng.c
@@ -434,7 +434,7 @@ static int prng_sha512_generate(u8 *buf, size_t nbytes)
                memcpy(prng_data->prev, buf, nbytes);
        }
 
-       return ret;
+       return nbytes;
 }