From: Jason Gunthorpe <jgg@nvidia.com>
To: David Airlie <airlied@gmail.com>,
Alyssa Rosenzweig <alyssa@rosenzweig.io>,
Albert Ou <aou@eecs.berkeley.edu>,
asahi@lists.linux.dev, Catalin Marinas <catalin.marinas@arm.com>,
Danilo Krummrich <dakr@redhat.com>,
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Haiyang Zhang <haiyangz@microsoft.com>,
iommu@lists.linux.dev, Jon Hunter <jonathanh@nvidia.com>,
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Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
"K. Y. Srinivasan" <kys@microsoft.com>,
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Palmer Dabbelt <palmer@dabbelt.com>,
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"Rafael J. Wysocki" <rafael@kernel.org>,
Rob Herring <robh+dt@kernel.org>,
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Sudeep Holla <sudeep.holla@arm.com>,
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
Sven Peter <sven@svenpeter.dev>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Vineet Gupta <vgupta@kernel.org>, Vinod Koul <vkoul@kernel.org>,
Wei Liu <wei.liu@kernel.org>, Will Deacon <will@kernel.org>
Cc: Lu Baolu <baolu.lu@linux.intel.com>,
Christoph Hellwig <hch@lst.de>,
Jerry Snitselaar <jsnitsel@redhat.com>,
Hector Martin <marcan@marcan.st>, Moritz Fischer <mdf@kernel.org>,
patches@lists.linux.dev,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
Rob Herring <robh@kernel.org>,
Thierry Reding <thierry.reding@gmail.com>
Subject: [PATCH 04/10] iommu: Mark dev_iommu_get() with lockdep
Date: Tue, 28 Nov 2023 20:48:00 -0400 [thread overview]
Message-ID: <4-v1-720585788a7d+811b-iommu_fwspec_p1_jgg@nvidia.com> (raw)
In-Reply-To: <0-v1-720585788a7d+811b-iommu_fwspec_p1_jgg@nvidia.com>
Allocation of dev->iommu must be done under the
iommu_probe_device_lock. Mark this with lockdep to discourage future
mistakes.
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Tested-by: Hector Martin <marcan@marcan.st>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
drivers/iommu/iommu.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 0d25468d53a68a..4323b6276e977f 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -334,6 +334,8 @@ static struct dev_iommu *dev_iommu_get(struct device *dev)
{
struct dev_iommu *param = dev->iommu;
+ lockdep_assert_held(&iommu_probe_device_lock);
+
if (param)
return param;
--
2.42.0
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next prev parent reply other threads:[~2023-11-29 0:48 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-29 0:47 [PATCH 00/10] IOMMU related FW parsing cleanup Jason Gunthorpe
2023-11-29 0:47 ` [PATCH 01/10] iommu: Remove struct iommu_ops *iommu from arch_setup_dma_ops() Jason Gunthorpe
2023-11-29 0:47 ` [PATCH 02/10] iommmu/of: Do not return struct iommu_ops from of_iommu_configure() Jason Gunthorpe
2023-11-29 3:09 ` Baolu Lu
2023-11-29 0:47 ` [PATCH 03/10] iommu/of: Use -ENODEV consistently in of_iommu_configure() Jason Gunthorpe
2023-11-29 6:04 ` Moritz Fischer
2023-11-29 0:48 ` Jason Gunthorpe [this message]
2023-11-29 3:11 ` [PATCH 04/10] iommu: Mark dev_iommu_get() with lockdep Baolu Lu
2023-11-29 6:06 ` Moritz Fischer
2023-11-29 0:48 ` [PATCH 05/10] iommu: Mark dev_iommu_priv_set() with a lockdep Jason Gunthorpe
2023-11-29 0:48 ` [PATCH 06/10] iommu: Replace iommu_device_lock with iommu_probe_device_lock Jason Gunthorpe
2023-11-29 17:58 ` Robin Murphy
2023-11-29 19:04 ` Jason Gunthorpe
2023-11-29 0:48 ` [PATCH 07/10] acpi: Do not return struct iommu_ops from acpi_iommu_configure_id() Jason Gunthorpe
2023-11-29 3:09 ` Baolu Lu
2023-11-29 6:09 ` Moritz Fischer
2023-11-29 0:48 ` [PATCH 08/10] iommu/tegra: Use tegra_dev_iommu_get_stream_id() in the remaining places Jason Gunthorpe
2023-11-29 16:23 ` Thierry Reding
2023-11-29 19:26 ` Jason Gunthorpe
2023-12-01 11:22 ` Thierry Reding
2023-11-29 0:48 ` [PATCH 09/10] ACPI: IORT: Cast from ULL to phys_addr_t Jason Gunthorpe
2023-11-29 6:18 ` Moritz Fischer
2023-11-29 0:48 ` [PATCH 10/10] ACPI: IORT: Allow COMPILE_TEST of IORT Jason Gunthorpe
2023-11-29 6:20 ` Moritz Fischer
2023-11-29 12:55 ` Lorenzo Pieralisi
2023-11-29 19:12 ` Jason Gunthorpe
2023-11-30 11:12 ` Lorenzo Pieralisi
2023-11-30 12:21 ` Jason Gunthorpe
2023-11-30 14:10 ` Robin Murphy
2023-11-30 15:36 ` Jason Gunthorpe
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