hwrng: core - Fix double unlock in rng_dev_read
When the loop terminates with size == 0 in rng_dev_read we will
unlock the rng mutex twice.
Reported-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index e989f67..3d9c61e 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -158,10 +158,11 @@
goto out;
}
}
-out_unlock:
- mutex_unlock(&rng_mutex);
out:
return ret ? : err;
+out_unlock:
+ mutex_unlock(&rng_mutex);
+ goto out;
}