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    Subject[PATCH 4.14 121/237] random: check for crng_init == 0 in add_device_randomness()
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    From: "Jason A. Donenfeld" <Jason@zx2c4.com>

    commit 1daf2f387652bf3a7044aea042f5023b3f6b189b upstream.

    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. Before this used
    crng_ready(), which was not correct.

    Cc: Theodore Ts'o <tytso@mit.edu>
    Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
    Reviewed-by: Eric Biggers <ebiggers@google.com>
    Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/char/random.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/char/random.c
    +++ b/drivers/char/random.c
    @@ -1015,7 +1015,7 @@ void add_device_randomness(const void *b
    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);

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