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random: Wake up all getrandom(2) callers when pool is ready

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If more than one application invokes getrandom(2) before the pool
is ready, then all bar one will be stuck forever because we use
wake_up_interruptible which wakes up a single task.

This patch replaces it with wake_up_all.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2015-05-21 16:19:54 +08:00
parent 374d4ad18a
commit 1d9de44e26
1 changed files with 1 additions and 1 deletions
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2
drivers/char/random.c
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@ -660,7 +660,7 @@ static void credit_entropy_bits(struct entropy_store *r, int nbits)
r->entropy_total = 0;
if (r == &nonblocking_pool) {
prandom_reseed_late();
wake_up_interruptible(&urandom_init_wait);
wake_up_all(&urandom_init_wait);
pr_notice("random: %s pool is initialized\n", r->name);
}
}