[PATCH v5 5/6] hw_random: don't double-check old_rng.

From: Amos Kong
Date: Fri Dec 05 2014 - 23:17:04 EST


From: Rusty Russell <rusty@xxxxxxxxxxxxxxx>

Interesting anti-pattern.

Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
---
drivers/char/hw_random/core.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c
index 067270b..a9286bf 100644
--- a/drivers/char/hw_random/core.c
+++ b/drivers/char/hw_random/core.c
@@ -476,14 +476,13 @@ 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();
--
1.9.3

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