[PATCH 3/3] xen/arm: domain_builder: irq sanity check logic fix

[julien.grall@arm.com]

From: Stewart Hildebrand <Stewart.Hildebrand@dornerworks.com>

Since commit "xen/arm: domain_build: Rework the way to allocate the
event channel interrupt", it is not possible for an irq to be both below 16
and greater/equal than 32.

Also fix the reference to linux documentation while we're at it.

Signed-off-by: Stewart Hildebrand <stewart.hildebrand@dornerworks.com>
Signed-off-by: Julien Grall <julien.grall@arm.com>
[Slightly rework the commit message]
---
 xen/arch/arm/domain_build.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index ed1a393bb5..28ee876b92 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -503,9 +503,10 @@ static void set_interrupt_ppi(gic_interrupt_t interrupt, unsigned int irq,
 {
     __be32 *cells = interrupt;
 
-    BUG_ON(irq < 16 && irq >= 32);
+    BUG_ON(irq < 16);
+    BUG_ON(irq >= 32);
 
-    /* See linux Documentation/devictree/bindings/arm/gic.txt */
+    /* See linux Documentation/devicetree/bindings/interrupt-controller/arm,gic.txt */
     dt_set_cell(&cells, 1, 1); /* is a PPI */
     dt_set_cell(&cells, 1, irq - 16); /* PPIs start at 16 */
     dt_set_cell(&cells, 1, (cpumask << 8) | level);
-- 
2.11.0


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