[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20230614154304.2860121-12-mshavit@google.com>
Date: Wed, 14 Jun 2023 23:42:03 +0800
From: Michael Shavit <mshavit@...gle.com>
To: Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
Joerg Roedel <joro@...tes.org>
Cc: Michael Shavit <mshavit@...gle.com>, jean-philippe@...aro.org,
nicolinc@...dia.com, jgg@...dia.com, baolu.lu@...ux.intel.com,
linux-arm-kernel@...ts.infradead.org, iommu@...ts.linux.dev,
linux-kernel@...r.kernel.org
Subject: [PATCH v3 11/13] iommu/arm-smmu-v3-sva: Clean unused iommu_sva
The __arm_smmu_sva_bind function returned an unused iommu_sva handle
that can be removed.
Signed-off-by: Michael Shavit <mshavit@...gle.com>
---
.../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 18 ++++++------------
1 file changed, 6 insertions(+), 12 deletions(-)
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
index 20301d0a2c0b0..650c9c9ad52f1 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
@@ -25,7 +25,6 @@ struct arm_smmu_mmu_notifier {
#define mn_to_smmu(mn) container_of(mn, struct arm_smmu_mmu_notifier, mn)
struct arm_smmu_bond {
- struct iommu_sva sva;
struct mm_struct *mm;
struct arm_smmu_mmu_notifier *smmu_mn;
struct list_head list;
@@ -364,8 +363,7 @@ static void arm_smmu_mmu_notifier_put(struct arm_smmu_mmu_notifier *smmu_mn)
arm_smmu_free_shared_cd(cd);
}
-static struct iommu_sva *
-__arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm)
+static int __arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm)
{
int ret;
struct arm_smmu_bond *bond;
@@ -374,14 +372,13 @@ __arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm)
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
if (!master || !master->sva_enabled)
- return ERR_PTR(-ENODEV);
+ return -ENODEV;
bond = kzalloc(sizeof(*bond), GFP_KERNEL);
if (!bond)
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
bond->mm = mm;
- bond->sva.dev = dev;
bond->smmu_mn = arm_smmu_mmu_notifier_get(smmu_domain, mm);
if (IS_ERR(bond->smmu_mn)) {
@@ -390,11 +387,11 @@ __arm_smmu_sva_bind(struct device *dev, struct mm_struct *mm)
}
list_add(&bond->list, &master->bonds);
- return &bond->sva;
+ return 0;
err_free_bond:
kfree(bond);
- return ERR_PTR(ret);
+ return ret;
}
bool arm_smmu_sva_supported(struct arm_smmu_device *smmu)
@@ -572,13 +569,10 @@ static int arm_smmu_sva_set_dev_pasid(struct iommu_domain *domain,
struct device *dev, ioasid_t id)
{
int ret = 0;
- struct iommu_sva *handle;
struct mm_struct *mm = domain->mm;
mutex_lock(&sva_lock);
- handle = __arm_smmu_sva_bind(dev, mm);
- if (IS_ERR(handle))
- ret = PTR_ERR(handle);
+ ret = __arm_smmu_sva_bind(dev, mm);
mutex_unlock(&sva_lock);
return ret;
--
2.41.0.162.gfafddb0af9-goog
Powered by blists - more mailing lists