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| author | Alex Nixon <alex.nixon@citrix.com> | 2008-08-20 05:50:53 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-10-16 16:52:58 +0200 |
| commit | 2b46b37de73296018da02c2a421ac2a9cbccfa9f (patch) | |
| tree | 58751acf11501ba9a755bae9ed689898e1f75291 | |
| parent | x86: probe nr_irqs even only mptable is used (diff) | |
| download | linux-2b46b37de73296018da02c2a421ac2a9cbccfa9f.tar.xz linux-2b46b37de73296018da02c2a421ac2a9cbccfa9f.zip | |
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>
| -rw-r--r-- | drivers/xen/events.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/xen/events.c b/drivers/xen/events.c index 56ace47f24d6..e6d47e8ca1ac 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -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 |