linux-kernel - [PATCH v8 1/5] iommu/arm-smmu: Destroy domain context in failure path

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Date:   Fri,  2 Mar 2018 15:40:46 +0530
From:   Vivek Gautam <vivek.gautam@...eaurora.org>
To:     joro@...tes.org, robh+dt@...nel.org, mark.rutland@....com,
        rjw@...ysocki.net, robin.murphy@....com, will.deacon@....com,
        robdclark@...il.com, iommu@...ts.linux-foundation.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     tfiga@...omium.org, jcrouse@...eaurora.org, sboyd@...eaurora.org,
        sricharan@...eaurora.org, m.szyprowski@...sung.com,
        architt@...eaurora.org, linux-arm-msm@...r.kernel.org,
        vivek.gautam@...eaurora.org
Subject: [PATCH v8 1/5] iommu/arm-smmu: Destroy domain context in failure path

If we fail after initializing domain_context, we should destroy
the context to free up resources.

Signed-off-by: Vivek Gautam <vivek.gautam@...eaurora.org>
---

 * New patch added in this series.

 drivers/iommu/arm-smmu.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 69e7c60792a8..ffc152c36002 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -1223,11 +1223,16 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
 		dev_err(dev,
 			"cannot attach to SMMU %s whilst already attached to domain on SMMU %s\n",
 			dev_name(smmu_domain->smmu->dev), dev_name(smmu->dev));
-		return -EINVAL;
+		ret = -EINVAL;
+		goto destroy_domain;
 	}
 
 	/* Looks ok, so add the device to the domain */
 	return arm_smmu_domain_add_master(smmu_domain, fwspec);
+
+destroy_domain:
+	arm_smmu_destroy_domain_context(domain);
+	return ret;
 }
 
 static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova,
-- 
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