From: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Date: Thu, 30 May 2019 12:02:28 +0000 (+0300)
Subject: iommu/arm: add missing return
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=7d75e66049437d2d88f70aaa1ac0deb0af952b4c;p=people%2Fsstabellini%2Fxen-unstable.git%2F.git

iommu/arm: add missing return

In case iommu_ops have been already set, we should not update it.

Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Signed-off-by: Andrii Anisov <andrii_anisov@epam.com>
Acked-by: Julien Grall <julien.grall@arm.com>
---

diff --git a/xen/drivers/passthrough/arm/iommu.c b/xen/drivers/passthrough/arm/iommu.c
index 325997b19f..2135233736 100644
--- a/xen/drivers/passthrough/arm/iommu.c
+++ b/xen/drivers/passthrough/arm/iommu.c
@@ -32,7 +32,10 @@ void __init iommu_set_ops(const struct iommu_ops *ops)
     BUG_ON(ops == NULL);
 
     if ( iommu_ops && iommu_ops != ops )
+    {
         printk("WARNING: Cannot set IOMMU ops, already set to a different value\n");
+        return;
+    }
 
     iommu_ops = ops;
 }