On 12/20/2018 7:05 PM, Srinivas Ramana wrote:
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. Signed-off-by: Srinivas Ramana <sram...@codeaurora.org> --- kernel/irq/manage.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 9dbdccab3b6a..5c0ba5ca5930 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);
Hi, Can you provide your feedback on this? Thanks, -- Srinivas R -- Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc., is a member of Code Aurora Forum, a Linux Foundation Collaborative Project
