From: Lu Baolu <baolu.lu@linux.intel.com> To: Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org> Cc: Ashish Mhetre <amhetre@nvidia.com>, Jason Gunthorpe <jgg@nvidia.com>, kevin.tian@intel.com, ashok.raj@intel.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Lu Baolu <baolu.lu@linux.intel.com> Subject: [PATCH 1/1] iommu: Extend mutex lock scope in iommu_probe_device() Date: Mon, 8 Nov 2021 14:13:49 +0800 [thread overview] Message-ID: <20211108061349.1985579-1-baolu.lu@linux.intel.com> (raw) Extend the scope of holding group->mutex so that it can cover the default domain check/attachment and direct mappings of reserved regions. Cc: Ashish Mhetre <amhetre@nvidia.com> Fixes: 211ff31b3d33b ("iommu: Fix race condition during default domain allocation") Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> --- drivers/iommu/iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index dd7863e453a5..8b86406b7162 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -288,11 +288,11 @@ int iommu_probe_device(struct device *dev) */ mutex_lock(&group->mutex); iommu_alloc_default_domain(group, dev); - mutex_unlock(&group->mutex); if (group->default_domain) { ret = __iommu_attach_device(group->default_domain, dev); if (ret) { + mutex_unlock(&group->mutex); iommu_group_put(group); goto err_release; } @@ -300,6 +300,7 @@ int iommu_probe_device(struct device *dev) iommu_create_device_direct_mappings(group, dev); + mutex_unlock(&group->mutex); iommu_group_put(group); if (ops->probe_finalize) -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Lu Baolu <baolu.lu@linux.intel.com> To: Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org> Cc: kevin.tian@intel.com, ashok.raj@intel.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Jason Gunthorpe <jgg@nvidia.com>, Ashish Mhetre <amhetre@nvidia.com> Subject: [PATCH 1/1] iommu: Extend mutex lock scope in iommu_probe_device() Date: Mon, 8 Nov 2021 14:13:49 +0800 [thread overview] Message-ID: <20211108061349.1985579-1-baolu.lu@linux.intel.com> (raw) Extend the scope of holding group->mutex so that it can cover the default domain check/attachment and direct mappings of reserved regions. Cc: Ashish Mhetre <amhetre@nvidia.com> Fixes: 211ff31b3d33b ("iommu: Fix race condition during default domain allocation") Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> --- drivers/iommu/iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index dd7863e453a5..8b86406b7162 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -288,11 +288,11 @@ int iommu_probe_device(struct device *dev) */ mutex_lock(&group->mutex); iommu_alloc_default_domain(group, dev); - mutex_unlock(&group->mutex); if (group->default_domain) { ret = __iommu_attach_device(group->default_domain, dev); if (ret) { + mutex_unlock(&group->mutex); iommu_group_put(group); goto err_release; } @@ -300,6 +300,7 @@ int iommu_probe_device(struct device *dev) iommu_create_device_direct_mappings(group, dev); + mutex_unlock(&group->mutex); iommu_group_put(group); if (ops->probe_finalize) -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next reply other threads:[~2021-11-08 6:18 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-11-08 6:13 Lu Baolu [this message] 2021-11-08 6:13 ` [PATCH 1/1] iommu: Extend mutex lock scope in iommu_probe_device() Lu Baolu 2021-12-06 11:40 ` Joerg Roedel 2021-12-06 11:40 ` Joerg Roedel
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