From: Aleksandr Aprelkov <aaprelkov@usergate.com>
To: Will Deacon <will@kernel.org>
Cc: Aleksandr Aprelkov <aaprelkov@usergate.com>,Robin Murphy
<robin.murphy@arm.com>,Joerg Roedel <joro@8bytes.org>,Jason
Gunthorpe <jgg@ziepe.ca>,Nicolin Chen
<nicolinc@nvidia.com>,Michael Shavit <mshavit@google.com>,Lu
Baolu <baolu.lu@linux.intel.com>,Marc Zyngier
<maz@kernel.org>,<linux-arm-kernel@lists.infradead.org>,<iommu@lists.linux.dev>,<linux-kernel@vger.kernel.org>
Subject: [PATCH v2] iommu/arm-smmu-v3: Free MSIs in case of ENOMEM
Date: Wed, 3 Apr 2024 12:37:59 +0700 [thread overview]
Message-ID: <20240403053759.643164-1-aaprelkov@usergate.com> (raw)
If devm_add_action() returns ENOMEM, then MSIs allocated but
not freed on teardown.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 166bdbd23161 ("iommu/arm-smmu: Add support for MSI on SMMUv3")
Signed-off-by: Aleksandr Aprelkov <aaprelkov@usergate.com>
---
v2: Use appropriate function for registration failure as
Jonathan Cameron <Jonathan.Cameron@Huawei.com> suggested.
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 4 +++-
1 file changed, 3 insertions(+), 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 41f93c3ab160..8800af041e5f 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -3402,7 +3402,9 @@ static void arm_smmu_setup_msis(struct arm_smmu_device *smmu)
smmu->priq.q.irq = msi_get_virq(dev, PRIQ_MSI_INDEX);
/* Add callback to free MSIs on teardown */
- devm_add_action(dev, arm_smmu_free_msis, dev);
+ ret = devm_add_action_or_reset(dev, arm_smmu_free_msis, dev);
+ if (ret)
+ dev_warn(dev, "failed to add free MSIs callback - falling back to wired irqs\n");
}
static void arm_smmu_setup_unique_irqs(struct arm_smmu_device *smmu)
--
2.34.1
next reply other threads:[~2024-04-03 5:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-03 5:37 Aleksandr Aprelkov [this message]
2024-04-09 10:43 ` [PATCH v2] iommu/arm-smmu-v3: Free MSIs in case of ENOMEM Mostafa Saleh
2024-04-09 11:17 ` Robin Murphy
2024-04-09 11:31 ` Mostafa Saleh
2024-04-09 11:46 ` Robin Murphy
2024-04-19 15:32 ` Will Deacon
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