genirq: Fix cpumask check in __irq_startup_managed()

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 <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Chen Yu <[email protected]>
Cc: Marc Zyngier <[email protected]>
Cc: Alok Kataria <[email protected]>
Cc: Joerg Roedel <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: [email protected]
Cc: Paolo Bonzini <[email protected]>
Cc: Rui Zhang <[email protected]>
Cc: "K. Y. Srinivasan" <[email protected]>
Cc: Arjan van de Ven <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Len Brown <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index f51b7b6d245177292bb3dbdc2ab25ebc7ddf42b2..6fc89fd938248f7e616e1594a786e2ffc4f19a5c 100644 (file)
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -202,7 +202,7 @@ __irq_startup_managed(struct irq_desc *desc, struct cpumask *aff, bool force)
 
        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