From: Lu Baolu <baolu.lu@linux.intel.com>
To: Jon Derrick <jonathan.derrick@intel.com>,
iommu@lists.linux-foundation.org, linux-pci@vger.kernel.org
Cc: Bjorn Helgaas <helgaas@kernel.org>,
Keith Busch <kbusch@kernel.org>,
David Woodhouse <dwmw2@infradead.org>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [RFC 2/5] iommu/vt-d: Unlink device if failed to add to group
Date: Wed, 1 Jan 2020 12:05:29 +0800 [thread overview]
Message-ID: <f63981a1-7fe3-d367-c2c1-060f9556f66c@linux.intel.com> (raw)
In-Reply-To: <1577823863-3303-3-git-send-email-jonathan.derrick@intel.com>
On 1/1/20 4:24 AM, Jon Derrick wrote:
> If the device fails to be added to the group, make sure to unlink the
> reference before returning.
>
> Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
This fix looks reasonable to me.
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Best regards,
baolu
> ---
> drivers/iommu/intel-iommu.c | 13 ++++++++++---
> 1 file changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
> index b2526a4..978d502 100644
> --- a/drivers/iommu/intel-iommu.c
> +++ b/drivers/iommu/intel-iommu.c
> @@ -5625,8 +5625,10 @@ static int intel_iommu_add_device(struct device *dev)
>
> group = iommu_group_get_for_dev(dev);
>
> - if (IS_ERR(group))
> - return PTR_ERR(group);
> + if (IS_ERR(group)) {
> + ret = PTR_ERR(group);
> + goto unlink;
> + }
>
> iommu_group_put(group);
>
> @@ -5652,7 +5654,8 @@ static int intel_iommu_add_device(struct device *dev)
> if (!get_private_domain_for_dev(dev)) {
> dev_warn(dev,
> "Failed to get a private domain.\n");
> - return -ENOMEM;
> + ret = -ENOMEM;
> + goto unlink;
> }
>
> dev_info(dev,
> @@ -5667,6 +5670,10 @@ static int intel_iommu_add_device(struct device *dev)
> }
>
> return 0;
> +
> +unlink:
> + iommu_device_unlink(&iommu->iommu, dev);
> + return ret;
> }
>
> static void intel_iommu_remove_device(struct device *dev)
>
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next prev parent reply other threads:[~2020-01-01 4:06 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-31 20:24 [RFC 0/5] Clean up VMD DMA Map Ops Jon Derrick
2019-12-31 20:24 ` [RFC 1/5] iommu: Remove device link to group on failure Jon Derrick
2020-01-01 3:59 ` Lu Baolu
2019-12-31 20:24 ` [RFC 2/5] iommu/vt-d: Unlink device if failed to add to group Jon Derrick
2020-01-01 4:05 ` Lu Baolu [this message]
2020-01-12 1:36 ` Lu Baolu
2020-01-13 12:20 ` Joerg Roedel
2020-01-14 1:58 ` Lu Baolu
2019-12-31 20:24 ` [RFC 3/5] x86/PCI: Expose VMD's device in pci_sysdata Jon Derrick
2020-01-09 14:33 ` Christoph Hellwig
2020-01-09 15:06 ` Derrick, Jonathan
2020-01-09 16:45 ` Derrick, Jonathan
2019-12-31 20:24 ` [RFC 4/5] PCI: vmd: Stop overriding dma_map_ops Jon Derrick
2020-01-09 14:36 ` Christoph Hellwig
2020-01-09 15:08 ` Derrick, Jonathan
2019-12-31 20:24 ` [RFC 5/5] x86/PCI: Remove unused X86_DEV_DMA_OPS Jon Derrick
2020-01-09 14:37 ` Christoph Hellwig
2020-01-09 15:06 ` Derrick, Jonathan
2020-01-07 13:41 ` [RFC 0/5] Clean up VMD DMA Map Ops Joerg Roedel
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