linux-kernel - [RFC PATCH v2 8/9] iommu/arm-smmu-v3: check for domain initialization using pgtbl

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Message-ID: <20230822185632.RFC.v2.8.I65dd382de382428dcb33333342b35405903ac768@changeid>
Date:   Tue, 22 Aug 2023 18:57:04 +0800
From:   Michael Shavit <mshavit@...gle.com>
To:     iommu@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Cc:     nicolinc@...dia.com, tina.zhang@...el.com,
        jean-philippe@...aro.org, will@...nel.org, robin.murphy@....com,
        jgg@...dia.com, Michael Shavit <mshavit@...gle.com>,
        Dawei Li <set_pte_at@...look.com>,
        Jason Gunthorpe <jgg@...pe.ca>, Joerg Roedel <joro@...tes.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Mark Brown <broonie@...nel.org>
Subject: [RFC PATCH v2 8/9] iommu/arm-smmu-v3: check for domain initialization
 using pgtbl_ops

In order to remove smmu_domain->smmu in the next commit

Signed-off-by: Michael Shavit <mshavit@...gle.com>
---

(no changes since v1)

 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 7c9897702bcde..9f8b701771fc3 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -2894,7 +2894,7 @@ static int arm_smmu_enable_nesting(struct iommu_domain *domain)
 	int ret = 0;
 
 	mutex_lock(&smmu_domain->init_mutex);
-	if (smmu_domain->smmu)
+	if (smmu_domain->pgtbl_ops)
 		ret = -EPERM;
 	else
 		smmu_domain->stage = ARM_SMMU_DOMAIN_NESTED;
-- 
2.42.0.rc1.204.g551eb34607-goog