@@ -19,6 +19,11 @@ static inline const struct iommu_ops *dev_iommu_ops(struct device *dev)
const struct iommu_ops *iommu_ops_from_fwnode(const struct fwnode_handle *fwnode);
+static inline const struct iommu_ops *iommu_fwspec_ops(struct iommu_fwspec *fwspec)
+{
+ return iommu_ops_from_fwnode(fwspec ? fwspec->iommu_fwnode : NULL);
+}
+
int iommu_group_replace_domain(struct iommu_group *group,
struct iommu_domain *new_domain);
@@ -510,7 +510,6 @@ DEFINE_MUTEX(iommu_probe_device_lock);
static int __iommu_probe_device(struct device *dev, struct list_head *group_list)
{
const struct iommu_ops *ops;
- struct iommu_fwspec *fwspec;
struct iommu_group *group;
struct group_device *gdev;
int ret;
@@ -523,12 +522,7 @@ static int __iommu_probe_device(struct device *dev, struct list_head *group_list
* be present, and that any of their registered instances has suitable
* ops for probing, and thus cheekily co-opt the same mechanism.
*/
- fwspec = dev_iommu_fwspec_get(dev);
- if (fwspec && fwspec->ops)
- ops = fwspec->ops;
- else
- ops = iommu_ops_from_fwnode(NULL);
-
+ ops = iommu_fwspec_ops(dev_iommu_fwspec_get(dev));
if (!ops)
return -ENODEV;
/*
@@ -2831,7 +2825,7 @@ int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode)
return -EPROBE_DEFER;
if (fwspec)
- return ops == fwspec->ops ? 0 : -EINVAL;
+ return ops == iommu_fwspec_ops(fwspec) ? 0 : -EINVAL;
if (!dev_iommu_get(dev))
return -ENOMEM;
@@ -2843,7 +2837,6 @@ int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode)
fwnode_handle_get(iommu_fwnode);
fwspec->iommu_fwnode = iommu_fwnode;
- fwspec->ops = ops;
dev_iommu_fwspec_set(dev, fwspec);
return 0;
}
@@ -17,6 +17,8 @@
#include <linux/slab.h>
#include <linux/fsl/mc.h>
+#include "iommu-priv.h"
+
static int of_iommu_xlate(struct device *dev,
struct of_phandle_args *iommu_spec)
{
@@ -32,7 +34,7 @@ static int of_iommu_xlate(struct device *dev,
if (ret)
return ret;
- ops = dev_iommu_fwspec_get(dev)->ops;
+ ops = iommu_ops_from_fwnode(&iommu_spec->np->fwnode);
if (!ops->of_xlate || !try_module_get(ops->owner))
return -ENODEV;
@@ -968,7 +968,6 @@ extern struct iommu_group *generic_single_device_group(struct device *dev);
/**
* struct iommu_fwspec - per-device IOMMU instance data
- * @ops: ops for this device's IOMMU
* @iommu_fwnode: firmware handle for this device's IOMMU
* @flags: IOMMU_FWSPEC_* flags
* @num_ids: number of associated device IDs
@@ -979,7 +978,6 @@ extern struct iommu_group *generic_single_device_group(struct device *dev);
* consumers.
*/
struct iommu_fwspec {
- const struct iommu_ops *ops;
struct fwnode_handle *iommu_fwnode;
u32 flags;
unsigned int num_ids;
The ops in iommu_fwspec are only needed for the early configuration and probe process, and by now are easy enough to derive on-demand in those couple of places which need them, so remove the redundant stored copy. Signed-off-by: Robin Murphy <robin.murphy@arm.com> --- drivers/iommu/iommu-priv.h | 5 +++++ drivers/iommu/iommu.c | 11 ++--------- drivers/iommu/of_iommu.c | 4 +++- include/linux/iommu.h | 2 -- 4 files changed, 10 insertions(+), 12 deletions(-)