From b321a2fba2734cbac799034081e20dcdb321ef4f Mon Sep 17 00:00:00 2001 From: Robin Murphy Date: Tue, 21 Jun 2022 16:14:26 +0100 Subject: iommu: Make .release_device optional Many drivers do nothing meaningful for .release_device, and it's neatly abstracted to just two callsites in the core code, so let's make it optional to implement. Signed-off-by: Robin Murphy Reviewed-by: Lu Baolu Link: https://lore.kernel.org/r/bda9d3eb4527eac8f6544a15067e2529cca54a2e.1655822151.git.robin.murphy@arm.com Signed-off-by: Joerg Roedel --- drivers/iommu/iommu.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'drivers/iommu/iommu.c') diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 862c3f61b7de..0aa141646bdf 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -259,7 +259,8 @@ static int __iommu_probe_device(struct device *dev, struct list_head *group_list return 0; out_release: - ops->release_device(dev); + if (ops->release_device) + ops->release_device(dev); out_module_put: module_put(ops->owner); @@ -337,7 +338,8 @@ void iommu_release_device(struct device *dev) iommu_device_unlink(dev->iommu->iommu_dev, dev); ops = dev_iommu_ops(dev); - ops->release_device(dev); + if (ops->release_device) + ops->release_device(dev); iommu_group_remove_device(dev); module_put(ops->owner); -- cgit v1.2.3