linux-kernel - [PATCH 2/3] random: check for crng_init == 0, not crng_ready() in add_device

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Date:   Sun, 13 Feb 2022 00:10:21 +0100
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     linux-kernel@...r.kernel.org, linux@...inikbrodowski.net
Cc:     "Jason A. Donenfeld" <Jason@...c4.com>,
        Theodore Ts'o <tytso@....edu>
Subject: [PATCH 2/3] random: check for crng_init == 0, not crng_ready() in add_device_randomness()

This has no real functional change, as crng_pre_init_inject() (and
before that, crng_slow_init()) always checks for == 0, not >= 2. So
correct the outer unlocked change to reflect that.

Cc: Dominik Brodowski <linux@...inikbrodowski.net>
Cc: Theodore Ts'o <tytso@....edu>
Signed-off-by: Jason A. Donenfeld <Jason@...c4.com>
---
 drivers/char/random.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/char/random.c b/drivers/char/random.c
index a128bb947bd4..9a8e1bb9845d 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1007,7 +1007,7 @@ void add_device_randomness(const void *buf, size_t size)
 	unsigned long time = random_get_entropy() ^ jiffies;
 	unsigned long flags;
 
-	if (!crng_ready() && size)
+	if (crng_init == 0 && size)
 		crng_pre_init_inject(buf, size, false, false);
 
 	spin_lock_irqsave(&input_pool.lock, flags);
-- 
2.35.0