From: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com> In case iommu_ops have been already set, we should not update it.
Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com> Signed-off-by: Andrii Anisov <andrii_ani...@epam.com> --- This patch is extracted from [1], as agreed here [2]. [1] https://lists.xenproject.org/archives/html/xen-devel/2019-01/msg01658.html [2] https://lists.xenproject.org/archives/html/xen-devel/2019-01/msg01859.html --- xen/drivers/passthrough/arm/iommu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/xen/drivers/passthrough/arm/iommu.c b/xen/drivers/passthrough/arm/iommu.c index 325997b..2135233 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; } -- 2.7.4 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
