Commit e48395f1 authored by Anton Blanchard's avatar Anton Blanchard Committed by Paul Mackerras

[POWERPC] Fix xics set_affinity code

On a POWER6 machine running 2.6.23-rc8 I sometimes see the following error:

xics_set_affinity: No online cpus in the mask 00000000,00000000,00000000,00000001 for irq 20

In a desperate attempt to get a changelog entry in 2.6.23, I took a look
into it.

It turns out we are passing a real and not a virtual irq into
get_irq_server.  This works for the case where hwirq < NR_IRQS and we
set virq = hwirq.  In my case however hwirq = 590082 and we try and
access irq_desc[590082], slightly past the end at 512 entries.

Lucky we ship lots of memory with our machines.
Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 75723957
......@@ -419,7 +419,7 @@ static void xics_set_affinity(unsigned int virq, cpumask_t cpumask)
* For the moment only implement delivery to all cpus or one cpu.
* Get current irq_server for the given irq
*/
irq_server = get_irq_server(irq, 1);
irq_server = get_irq_server(virq, 1);
if (irq_server == -1) {
char cpulist[128];
cpumask_scnprintf(cpulist, sizeof(cpulist), cpumask);
......
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