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| author | Alex Williamson <alex.williamson@redhat.com> | 2011-03-04 14:52:16 -0700 |
|---|---|---|
| committer | Andi Kleen <ak@linux.intel.com> | 2011-04-28 08:21:11 -0700 |
| commit | 8e2f9d0be8626aca810c8cac38fce207ea81af4a (patch) | |
| tree | 651b958c5e561cf130e77af9a10df60ede04ee56 | |
| parent | be57626a0d05b26e7e2db01ebe3fe0c0d3e8bc2e (diff) | |
| download | lwn-8e2f9d0be8626aca810c8cac38fce207ea81af4a.tar.gz lwn-8e2f9d0be8626aca810c8cac38fce207ea81af4a.zip | |
intel-iommu: Unlink domain from iommu
commit a97590e56d0d58e1dd262353f7cbd84e81d8e600 upstream.
When we remove a device, we unlink the iommu from the domain, but
we never do the reverse unlinking of the domain from the iommu.
This means that we never clear iommu->domain_ids, eventually leading
to resource exhaustion if we repeatedly bind and unbind a device
to a driver. Also free empty domains to avoid a resource leak.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Donald Dutile <ddutile@redhat.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
| -rw-r--r-- | drivers/pci/intel-iommu.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 8e499e8d2481..50e083e4208c 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -3260,9 +3260,15 @@ static int device_notifier(struct notifier_block *nb, if (!domain) return 0; - if (action == BUS_NOTIFY_UNBOUND_DRIVER && !iommu_pass_through) + if (action == BUS_NOTIFY_UNBOUND_DRIVER && !iommu_pass_through) { domain_remove_one_dev_info(domain, pdev); + if (!(domain->flags & DOMAIN_FLAG_VIRTUAL_MACHINE) && + !(domain->flags & DOMAIN_FLAG_STATIC_IDENTITY) && + list_empty(&domain->devices)) + domain_exit(domain); + } + return 0; } @@ -3411,6 +3417,11 @@ static void domain_remove_one_dev_info(struct dmar_domain *domain, domain->iommu_count--; domain_update_iommu_cap(domain); spin_unlock_irqrestore(&domain->iommu_lock, tmp_flags); + + spin_lock_irqsave(&iommu->lock, tmp_flags); + clear_bit(domain->id, iommu->domain_ids); + iommu->domains[domain->id] = NULL; + spin_unlock_irqrestore(&iommu->lock, tmp_flags); } spin_unlock_irqrestore(&device_domain_lock, flags); |