From: Rusty Russell <rusty@rustcorp.com.au>
Date: Mon, 8 Dec 2014 08:50:39 +0000 (+0800)
Subject: hwrng: don't double-check old_rng.
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=ebbbfa248389b176e2e62d8cf91814253849ccc9;p=deliverable%2Flinux.git

hwrng: don't double-check old_rng.

Interesting anti-pattern.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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 8d609a026465..e384ee3ed604 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -472,14 +472,13 @@ int hwrng_register(struct hwrng *rng)
 	}
 
 	old_rng = current_rng;
+	err = 0;
 	if (!old_rng) {
 		err = hwrng_init(rng);
 		if (err)
 			goto out_unlock;
 		set_current_rng(rng);
-	}
-	err = 0;
-	if (!old_rng) {
+
 		err = register_miscdev();
 		if (err) {
 			drop_current_rng();