Commit c995e9a9 authored Dec 18, 2018 by Srinivas Ramana

genirq: Make sure the affinity to be set is not empty



If the default_affinity is managed/initialized by a system and
all the cpus present in irq_default_affinity are hotplugged out
we may end up passing a cpumask of 0 to irq_do_set_affinity().

Fix this by falling back to cpu_online_mask in case the
calculated affinity becomes zero.

Change-Id: I11f6e6dd7e44865330296f7c48aa2d0594d31610
Signed-off-by: Srinivas Ramana <sramana@codeaurora.org>

parent c0fb4952

kernel/irq/manage.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -363,6 +363,9 @@ 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);