Even with an affinity mask that has multiple CPUs set, IRQs always run
on the first CPU in their affinity mask. Drivers that register an IRQ
affinity notifier (such as pm_qos) will therefore have an incorrect
assumption of where an IRQ is affined.
Fix the IRQ affinity mask deception by forcing it to only contain one
set CPU.
Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com>
struct irq_chip *chip = irq_data_get_irq_chip(data);
int ret;
+ /* IRQs only run on the first CPU in the affinity mask; reflect that */
+ mask = cpumask_of(cpumask_first(mask));
ret = chip->irq_set_affinity(data, mask, force);
switch (ret) {
case IRQ_SET_MASK_OK: