iommu/virtio: Do not dereference fwnode in struct device

In order to make the underneath API easier to change in the future,
prevent users from dereferencing fwnode from struct device.
Instead, use the specific device_match_fwnode() API for that.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Link: https://lore.kernel.org/r/20220801165142.20898-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c
index 08eeafc9529fa0580da66a4e93fd8fb2b81fc52e..9fe723f55213fbd290a3537aecc01783e41272d9 100644 (file)
--- a/drivers/iommu/virtio-iommu.c
+++ b/drivers/iommu/virtio-iommu.c
@@ -925,7 +925,7 @@ static struct virtio_driver virtio_iommu_drv;
 
 static int viommu_match_node(struct device *dev, const void *data)
 {
-       return dev->parent->fwnode == data;
+       return device_match_fwnode(dev->parent, data);
 }
 
 static struct viommu_dev *viommu_get_by_fwnode(struct fwnode_handle *fwnode)