linux-kernel - [PATCH 1/2] media: nvidia: tegra: Use iommu_paging_domain

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Message-Id: <20240812072105.9578-1-baolu.lu@linux.intel.com>
Date: Mon, 12 Aug 2024 15:21:04 +0800
From: Lu Baolu <baolu.lu@...ux.intel.com>
To: Dmitry Osipenko <digetx@...il.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Stanimir Varbanov <stanimir.k.varbanov@...il.com>,
	Vikash Garodia <quic_vgarodia@...cinc.com>,
	Joerg Roedel <joro@...tes.org>,
	Will Deacon <will@...nel.org>,
	Robin Murphy <robin.murphy@....com>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Kevin Tian <kevin.tian@...el.com>
Cc: linux-media@...r.kernel.org,
	linux-tegra@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Lu Baolu <baolu.lu@...ux.intel.com>,
	Jason Gunthorpe <jgg@...dia.com>
Subject: [PATCH 1/2] media: nvidia: tegra: Use iommu_paging_domain_alloc()

An iommu domain is allocated in tegra_vde_iommu_init() and is attached to
vde->dev. Use iommu_paging_domain_alloc() to make it explicit.

Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
Link: https://lore.kernel.org/r/20240610085555.88197-9-baolu.lu@linux.intel.com
---
 drivers/media/platform/nvidia/tegra-vde/iommu.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/nvidia/tegra-vde/iommu.c b/drivers/media/platform/nvidia/tegra-vde/iommu.c
index 5521ed3e465f..b1d9d841d944 100644
--- a/drivers/media/platform/nvidia/tegra-vde/iommu.c
+++ b/drivers/media/platform/nvidia/tegra-vde/iommu.c
@@ -78,9 +78,10 @@ int tegra_vde_iommu_init(struct tegra_vde *vde)
 		arm_iommu_release_mapping(mapping);
 	}
 #endif
-	vde->domain = iommu_domain_alloc(&platform_bus_type);
-	if (!vde->domain) {
-		err = -ENOMEM;
+	vde->domain = iommu_paging_domain_alloc(dev);
+	if (IS_ERR(vde->domain)) {
+		err = PTR_ERR(vde->domain);
+		vde->domain = NULL;
 		goto put_group;
 	}
 
-- 
2.34.1