Commit 2b46b37d authored Aug 19, 2008 by Alex Nixon Committed by Ingo Molnar Oct 16, 2008

xen: fix memory access violation bug when CONFIG_HAVE_SPARSE_IRQ is enabled



When sparse IRQs are enabled, it is not safe to assume an IRQ descriptor
exists for every possible IRQ.  This patch causes init_evtchn_cpu_bindings
to skip initialisation of IRQ descriptors which don't exist.

Signed-off-by: Alex Nixon <alex.nixon@citrix.com>
Acked-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 9d6a4d08

drivers/xen/events.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -141,6 +141,8 @@ static void init_evtchn_cpu_bindings(void)
		/* By default all event channels notify CPU#0. */
		for (i = 0; i < nr_irqs; i++) {
		struct irq_desc *desc = irq_to_desc(i);
		if (!desc)
		continue;
		desc->affinity = cpumask_of_cpu(0);
		}
		#endif

Admin message