linux-kernel - [PATCH 4.19 018/234] random: Dont wake crng_init_wait when crng

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Message-Id: <20220623164343.577672811@linuxfoundation.org>
Date:   Thu, 23 Jun 2022 18:41:25 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Andy Lutomirski <luto@...nel.org>,
        Theodore Tso <tytso@....edu>,
        "Jason A. Donenfeld" <Jason@...c4.com>
Subject: [PATCH 4.19 018/234] random: Dont wake crng_init_wait when crng_init == 1

From: Andy Lutomirski <luto@...nel.org>

commit 4c8d062186d9923c09488716b2fb1b829b5b8006 upstream.

crng_init_wait is only used to wayt for crng_init to be set to 2, so
there's no point to waking it when crng_init is set to 1.  Remove the
unnecessary wake_up_interruptible() call.

Signed-off-by: Andy Lutomirski <luto@...nel.org>
Link: https://lore.kernel.org/r/6fbc0bfcbfc1fa2c76fd574f5b6f552b11be7fde.1577088521.git.luto@kernel.org
Signed-off-by: Theodore Ts'o <tytso@....edu>
Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/char/random.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -965,7 +965,6 @@ static int crng_fast_load(const char *cp
 	if (crng_init_cnt >= CRNG_INIT_CNT_THRESH) {
 		invalidate_batched_entropy();
 		crng_init = 1;
-		wake_up_interruptible(&crng_init_wait);
 		pr_notice("random: fast init done\n");
 	}
 	return 1;