perf/arm-ni: Set initial IRQ affinity

commit c872d7c837382517c51a76dfdcf550332cfab231 upstream.

While we do request our IRQs with the right flags to stop their affinity
changing unexpectedly, we forgot to actually set it to start with. Oops.

Cc: [email protected]
Fixes: 4d5a768 ("perf: Add driver for Arm NI-700 interconnect PMU")
Signed-off-by: Robin Murphy <[email protected]>
Tested-by: Shouping Wang <[email protected]>
Link: https://lore.kernel.org/r/614ced9149ee8324e58930862bd82cbf46228d27.1747149165.git.robin.murphy@arm.com
Signed-off-by: Will Deacon <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
(cherry picked from commit efee62c5fc8c27d15c659c507db111d1eb1164e4)

Author: rmurphy-arm

drivers/perf/arm-ni.c

@@ -545,6 +545,8 @@ static int arm_ni_init_cd(struct arm_ni *ni, struct arm_ni_node *node, u64 res_s
 		return err;
 
 	cd->cpu = cpumask_local_spread(0, dev_to_node(ni->dev));
+	irq_set_affinity(cd->irq, cpumask_of(cd->cpu));
+
 	cd->pmu = (struct pmu) {
 		.module = THIS_MODULE,
 		.parent = ni->dev,