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[v12,1/6] iommu: Add note about struct iommu_fwspec usage

Message ID 20221202152644.29450-2-thierry.reding@gmail.com
State Superseded
Headers show
Series mmc: sdhci: Add Tegra234 support | expand

Commit Message

Thierry Reding Dec. 2, 2022, 3:26 p.m. UTC 
From: Thierry Reding <treding@nvidia.com>

This structure is to be considered private to the IOMMU API. Except for
very few exceptions, IOMMU consumer drivers should treat this as opaque
data.

Acked-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
 include/linux/iommu.h | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 1690c334e516..dc5e6f5c14fc 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -641,6 +641,10 @@  struct iommu_group *fsl_mc_device_group(struct device *dev);
  * @flags: IOMMU_FWSPEC_* flags
  * @num_ids: number of associated device IDs
  * @ids: IDs which this device may present to the IOMMU
+ *
+ * Note that the IDs (and any other information, really) stored in this structure should be
+ * considered private to the IOMMU device driver and are not to be used directly by IOMMU
+ * consumers.
  */
 struct iommu_fwspec {
 	const struct iommu_ops	*ops;