[PATCH] xen/irq: Propagate the error from init_one_desc_irq() in init_irq_data()

[Julien Grall <julien@xxxxxxx>]

From: Julien Grall <jgrall@xxxxxxxxxx>

init_one_desc_irq() can return an error if it is unable to allocate
memory. While this is unlikely to happen during boot (called from
init_irq_data()), it is better to harden the code by propagting the
return value.

Spotted by coverity.

CID: 106529

Signed-off-by: Julien Grall <jgrall@xxxxxxxxxx>
---
 xen/arch/arm/irq.c | 7 ++++++-
 xen/arch/x86/irq.c | 7 ++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/xen/arch/arm/irq.c b/xen/arch/arm/irq.c
index 3877657a5277..279d221a2b85 100644
--- a/xen/arch/arm/irq.c
+++ b/xen/arch/arm/irq.c
@@ -88,7 +88,12 @@ static int __init init_irq_data(void)
     for ( irq = NR_LOCAL_IRQS; irq < NR_IRQS; irq++ )
     {
         struct irq_desc *desc = irq_to_desc(irq);
-        init_one_irq_desc(desc);
+        int rc;
+
+        rc = init_one_irq_desc(desc);
+        if ( rc )
+            return rc;
+
         desc->irq = irq;
         desc->action  = NULL;
     }
diff --git a/xen/arch/x86/irq.c b/xen/arch/x86/irq.c
index 45966947919e..3ebd684415ac 100644
--- a/xen/arch/x86/irq.c
+++ b/xen/arch/x86/irq.c
@@ -428,9 +428,14 @@ int __init init_irq_data(void)
 
     for ( irq = 0; irq < nr_irqs_gsi; irq++ )
     {
+        int rc;
+
         desc = irq_to_desc(irq);
         desc->irq = irq;
-        init_one_irq_desc(desc);
+
+        rc = init_one_irq_desc(desc);
+        if ( rc )
+            return rc;
     }
     for ( ; irq < nr_irqs; irq++ )
         irq_to_desc(irq)->irq = irq;
-- 
2.17.1