40 lines
1.2 KiB
Diff
40 lines
1.2 KiB
Diff
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From ad7154f084e30ed053a616fd1ebe1d969c2b742a Mon Sep 17 00:00:00 2001
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From: Herbert Xu <herbert@gondor.apana.org.au>
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Date: Thu, 21 May 2015 16:19:54 +0800
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Subject: [PATCH 2/3] BACKPORT: random: Wake up all getrandom(2) callers when
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pool is ready
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Clean cherry pick of 1d9de44e268d880cbe2d0bd3be1ef0661f93fd34.
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If more than one application invokes getrandom(2) before the pool
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is ready, then all bar one will be stuck forever because we use
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wake_up_interruptible which wakes up a single task.
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This patch replaces it with wake_up_all.
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Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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Bug: http://b/29621447
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Change-Id: I5dfd7abac10898802f030e0a2af7110809283328
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(cherry picked from commit 1d9de44e268d880cbe2d0bd3be1ef0661f93fd34)
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---
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drivers/char/random.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/drivers/char/random.c b/drivers/char/random.c
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index 8d09b53c9102..702b5bcad2c8 100644
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--- a/drivers/char/random.c
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+++ b/drivers/char/random.c
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@@ -615,7 +615,7 @@ retry:
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r->initialized = 1;
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r->entropy_total = 0;
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if (r == &nonblocking_pool) {
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- wake_up_interruptible(&urandom_init_wait);
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+ wake_up_all(&urandom_init_wait);
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pr_notice("random: %s pool is initialized\n", r->name);
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}
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}
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--
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2.19.0
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