From: Joerg Roedel <[email protected]> This callback should never return NULL. Print a warning if that happens so that we notice and can fix it.
Signed-off-by: Joerg Roedel <[email protected]> --- drivers/iommu/iommu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index de09e1e..3f6ea16 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1010,6 +1010,9 @@ struct iommu_group *iommu_group_get_for_dev(struct device *dev) if (ops && ops->device_group) group = ops->device_group(dev); + if (WARN_ON_ONCE(group == NULL)) + return ERR_PTR(-EINVAL); + if (IS_ERR(group)) return group; -- 2.7.4
