perf/arm-ni: Set initial IRQ affinity

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]>

Author: rmurphy-arm

drivers/perf/arm-ni.c

@@ -544,6 +544,8 @@ 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,