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[v2,6/8] ppc/xics: An ICS with offset 0 is assumed to be uninitialized

Message ID 1467140719-4701-7-git-send-email-nikunj@linux.vnet.ibm.com
State New
Headers show

Commit Message

Nikunj A Dadhania June 28, 2016, 7:05 p.m. UTC 
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>

This will make life easier for dealing with dynamically configured
ICSes such as PHB3

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
---
 include/hw/ppc/xics.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/include/hw/ppc/xics.h b/include/hw/ppc/xics.h
index 6ad3057..8c22daf 100644
--- a/include/hw/ppc/xics.h
+++ b/include/hw/ppc/xics.h
@@ -150,7 +150,7 @@  struct ICSState {
 
 static inline bool ics_valid_irq(ICSState *ics, uint32_t nr)
 {
-    return (nr >= ics->offset)
+    return (ics->offset != 0) && (nr >= ics->offset)
         && (nr < (ics->offset + ics->nr_irqs));
 }