linux-kernel - [PATCH RFC v2 2/4] iommu: Pass in gdev to __iommu_device_set

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Message-ID: <46a1c0e7d07722c542084be9611f2fdf770c3a1d.1751096303.git.nicolinc@nvidia.com>
Date: Sat, 28 Jun 2025 00:42:40 -0700
From: Nicolin Chen <nicolinc@...dia.com>
To: <jgg@...dia.com>, <joro@...tes.org>, <will@...nel.org>,
	<robin.murphy@....com>, <rafael@...nel.org>, <lenb@...nel.org>,
	<bhelgaas@...gle.com>
CC: <iommu@...ts.linux.dev>, <linux-kernel@...r.kernel.org>,
	<linux-acpi@...r.kernel.org>, <linux-pci@...r.kernel.org>,
	<patches@...ts.linux.dev>, <pjaroszynski@...dia.com>, <vsethi@...dia.com>,
	<helgaas@...nel.org>, <baolu.lu@...ux.intel.com>
Subject: [PATCH RFC v2 2/4] iommu: Pass in gdev to __iommu_device_set_domain

This will need to check a per gdev property, since the dev pointer cannot
store any private iommu flag for the iommu code to use. Thus, pass in the
gdev pointer instead.

Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
---
 drivers/iommu/iommu.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 08ff7efa8925..bd3deedcd2de 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -112,7 +112,7 @@ enum {
 };
 
 static int __iommu_device_set_domain(struct iommu_group *group,
-				     struct device *dev,
+				     struct group_device *gdev,
 				     struct iommu_domain *new_domain,
 				     unsigned int flags);
 static int __iommu_group_set_domain_internal(struct iommu_group *group,
@@ -602,7 +602,7 @@ static int __iommu_probe_device(struct device *dev, struct list_head *group_list
 	if (group->default_domain)
 		iommu_create_device_direct_mappings(group->default_domain, dev);
 	if (group->domain) {
-		ret = __iommu_device_set_domain(group, dev, group->domain, 0);
+		ret = __iommu_device_set_domain(group, gdev, group->domain, 0);
 		if (ret)
 			goto err_remove_gdev;
 	} else if (!group->default_domain && !group_list) {
@@ -2267,10 +2267,11 @@ int iommu_attach_group(struct iommu_domain *domain, struct iommu_group *group)
 EXPORT_SYMBOL_GPL(iommu_attach_group);
 
 static int __iommu_device_set_domain(struct iommu_group *group,
-				     struct device *dev,
+				     struct group_device *gdev,
 				     struct iommu_domain *new_domain,
 				     unsigned int flags)
 {
+	struct device *dev = gdev->dev;
 	int ret;
 
 	/*
@@ -2350,8 +2351,7 @@ static int __iommu_group_set_domain_internal(struct iommu_group *group,
 	 */
 	result = 0;
 	for_each_group_device(group, gdev) {
-		ret = __iommu_device_set_domain(group, gdev->dev, new_domain,
-						flags);
+		ret = __iommu_device_set_domain(group, gdev, new_domain, flags);
 		if (ret) {
 			result = ret;
 			/*
@@ -2383,7 +2383,7 @@ static int __iommu_group_set_domain_internal(struct iommu_group *group,
 		 */
 		if (group->domain)
 			WARN_ON(__iommu_device_set_domain(
-				group, gdev->dev, group->domain,
+				group, gdev, group->domain,
 				IOMMU_SET_DOMAIN_MUST_SUCCEED));
 		if (gdev == last_gdev)
 			break;
-- 
2.43.0