From: Steffen Klassert Date: Tue, 20 Jul 2010 06:52:20 +0000 (+0200) Subject: crypto: pcrypt - Dont calulate a callback cpu on empty callback cpumask X-Git-Url: http://git.mmlx.us/?a=commitdiff_plain;h=cc74f4bc111e9554bcd6445ad0fe1d90e5d2eb34;p=linux-edison.git crypto: pcrypt - Dont calulate a callback cpu on empty callback cpumask If the callback cpumask is empty, we crash with a division by zero when we try to calculate a callback cpu. So we don't update the callback cpu in pcrypt_do_parallel if the callback cpumask is empty. Signed-off-by: Steffen Klassert Signed-off-by: Herbert Xu --- diff --git a/crypto/pcrypt.c b/crypto/pcrypt.c index 7153a50bce2..794c172b99f 100644 --- a/crypto/pcrypt.c +++ b/crypto/pcrypt.c @@ -82,6 +82,9 @@ static int pcrypt_do_parallel(struct padata_priv *padata, unsigned int *cb_cpu, if (cpumask_test_cpu(cpu, cpumask->mask)) goto out; + if (!cpumask_weight(cpumask->mask)) + goto out; + cpu_index = cpu % cpumask_weight(cpumask->mask); cpu = cpumask_first(cpumask->mask);