diff mbox series

[RFC,09/17] iommu: Add iommu_fwspec_append_ids()

Message ID 9-v1-5f734af130a3+34f-iommu_fwspec_jgg@nvidia.com
State New
Headers show
Series Solve iommu probe races around iommu_fwspec | expand

Commit Message

Jason Gunthorpe Nov. 3, 2023, 4:44 p.m. UTC 
This is a version of iommu_fwspec_add_ids() that takes in the fwspec as an
argument instead of getting it through dev->iommu.

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/iommu/iommu.c | 17 +++++++++++------
 include/linux/iommu.h |  1 +
 2 files changed, 12 insertions(+), 6 deletions(-)

Comments

Jerry Snitselaar Nov. 13, 2023, 8:12 p.m. UTC | #1 
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
diff mbox series

Patch

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index ad2963d69a0538..15dbe2d9eb24c2 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -3067,15 +3067,10 @@  int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
 }
 EXPORT_SYMBOL_GPL(iommu_fwspec_init);
 
-
-int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids)
+int iommu_fwspec_append_ids(struct iommu_fwspec *fwspec, u32 *ids, int num_ids)
 {
-	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
 	int i, new_num;
 
-	if (!fwspec)
-		return -EINVAL;
-
 	new_num = fwspec->num_ids + num_ids;
 	if (new_num <= 1) {
 		if (fwspec->ids != &fwspec->single_id)
@@ -3097,6 +3092,16 @@  int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids)
 	fwspec->num_ids = new_num;
 	return 0;
 }
+EXPORT_SYMBOL_GPL(iommu_fwspec_append_ids);
+
+int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids)
+{
+	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
+
+	if (!fwspec)
+		return -EINVAL;
+	return iommu_fwspec_append_ids(fwspec, ids, num_ids);
+}
 EXPORT_SYMBOL_GPL(iommu_fwspec_add_ids);
 
 /*
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 2644c61b572b8f..c5a5e2b5e2cc2a 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -700,6 +700,7 @@  static inline void iommu_fwspec_free(struct device *dev)
 }
 int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
 const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
+int iommu_fwspec_append_ids(struct iommu_fwspec *fwspec, u32 *ids, int num_ids);
 
 static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
 {