[patch 01/52] genirq: Fix cpumask check in __irq_startup_managed()

Thomas Gleixner
2017-09-13T21:48:16Z

[-- Attachment #1: genirq--Fix-cpumask-check.patch --]
[-- Type: text/plain, Size: 739 bytes --]

The result of cpumask_any_and() is invalid when result greater or equal
nr_cpu_ids. The current check is checking for greater only. Fix it.

Fixes: 761ea388e8c4 ("genirq: Handle managed irqs gracefully in irq_startup()")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
---
kernel/irq/chip.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -202,7 +202,7 @@ static int

irqd_clr_managed_shutdown(d);

- if (cpumask_any_and(aff, cpu_online_mask) > nr_cpu_ids) {
+ if (cpumask_any_and(aff, cpu_online_mask) >= nr_cpu_ids) {
/*
* Catch code which fiddles with enable_irq() on a managed
* and potentially shutdown IRQ. Chained interrupt