linux-kernel - [PATCH v4 3/4] drm/nouveau/tegra: Use iommu_paging_domain

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Message-ID: <20241009041147.28391-4-baolu.lu@linux.intel.com>
Date: Wed,  9 Oct 2024 12:11:46 +0800
From: Lu Baolu <baolu.lu@...ux.intel.com>
To: 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: Yi Liu <yi.l.liu@...el.com>,
	David Airlie <airlied@...il.com>,
	Daniel Vetter <daniel@...ll.ch>,
	Kalle Valo <kvalo@...nel.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Mathieu Poirier <mathieu.poirier@...aro.org>,
	Alex Williamson <alex.williamson@...hat.com>,
	mst@...hat.com,
	Jason Wang <jasowang@...hat.com>,
	Thierry Reding <thierry.reding@...il.com>,
	Jonathan Hunter <jonathanh@...dia.com>,
	Mikko Perttunen <mperttunen@...dia.com>,
	Jeff Johnson <quic_jjohnson@...cinc.com>,
	ath10k@...ts.infradead.org,
	ath11k@...ts.infradead.org,
	Lyude Paul <lyude@...hat.com>,
	Beleswar Padhi <b-padhi@...com>,
	iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Lu Baolu <baolu.lu@...ux.intel.com>,
	Thierry Reding <treding@...dia.com>
Subject: [PATCH v4 3/4] drm/nouveau/tegra: Use iommu_paging_domain_alloc()

In nvkm_device_tegra_probe_iommu(), a paging domain is allocated for @dev
and attached to it on success. Use iommu_paging_domain_alloc() to make it
explicit.

Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>
Acked-by: Thierry Reding <treding@...dia.com>
Reviewed-by: Lyude Paul <lyude@...hat.com>
---
 drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
index d1c294f00665..78a83f904bbd 100644
--- a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
+++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
@@ -120,8 +120,8 @@ nvkm_device_tegra_probe_iommu(struct nvkm_device_tegra *tdev)
 	mutex_init(&tdev->iommu.mutex);
 
 	if (device_iommu_mapped(dev)) {
-		tdev->iommu.domain = iommu_domain_alloc(&platform_bus_type);
-		if (!tdev->iommu.domain)
+		tdev->iommu.domain = iommu_paging_domain_alloc(dev);
+		if (IS_ERR(tdev->iommu.domain))
 			goto error;
 
 		/*
-- 
2.43.0