Commit-ID: bddda606ec76550dd63592e32a6e87e7d32583f7 Gitweb: https://git.kernel.org/tip/bddda606ec76550dd63592e32a6e87e7d32583f7 Author: Srinivas Ramana <[email protected]> AuthorDate: Thu, 20 Dec 2018 19:05:57 +0530 Committer: Thomas Gleixner <[email protected]> CommitDate: Tue, 15 Jan 2019 11:23:27 +0100
genirq: Make sure the initial affinity is not empty If all CPUs in the irq_default_affinity mask are offline when an interrupt is initialized then irq_setup_affinity() can set an empty affinity mask for a newly allocated interrupt. Fix this by falling back to cpu_online_mask in case the resulting affinity mask is zero. Signed-off-by: Srinivas Ramana <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Cc: [email protected] Link: https://lkml.kernel.org/r/[email protected] --- kernel/irq/manage.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index a4888ce4667a..84b54a17b95d 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -393,6 +393,9 @@ int irq_setup_affinity(struct irq_desc *desc) } cpumask_and(&mask, cpu_online_mask, set); + if (cpumask_empty(&mask)) + cpumask_copy(&mask, cpu_online_mask); + if (node != NUMA_NO_NODE) { const struct cpumask *nodemask = cpumask_of_node(node);
