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

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Clean cherry pick of 1d9de44e268d880cbe2d0bd3be1ef0661f93fd34.

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>

Bug: http://b/29621447
Change-Id: I5dfd7abac10898802f030e0a2af7110809283328
(cherry picked from commit 1d9de44e268d880cbe2d0bd3be1ef0661f93fd34)
This commit is contained in:
Herbert Xu 2015-05-21 16:19:54 +08:00 committed by Artem Borisov
parent 86739403f2
commit b09ea83ef0
1 changed files with 1 additions and 1 deletions
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2
drivers/char/random.c
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@ -602,7 +602,7 @@ retry:
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);
}
}