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| author | Joerg Roedel <joerg.roedel@amd.com> | 2011-09-02 14:19:50 +0200 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2011-09-02 14:19:50 +0200 |
| commit | e33acde91140f1809952d1c135c36feb66a51887 (patch) | |
| tree | 86c6c7d7c76a311604843e919df141c30c5b1160 /drivers | |
| parent | iommu/amd: Make sure iommu->need_sync contains correct value (diff) | |
| download | linux-e33acde91140f1809952d1c135c36feb66a51887.tar.xz linux-e33acde91140f1809952d1c135c36feb66a51887.zip | |
iommu/amd: Don't take domain->lock recursivly
The domain_flush_devices() function takes the domain->lock.
But this function is only called from update_domain() which
itself is already called unter the domain->lock. This causes
a deadlock situation when the dma-address-space of a domain
grows larger than 1GB.
Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 45652231dae8..0e4227f457af 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -847,14 +847,9 @@ static void domain_flush_complete(struct protection_domain *domain) static void domain_flush_devices(struct protection_domain *domain) { struct iommu_dev_data *dev_data; - unsigned long flags; - - spin_lock_irqsave(&domain->lock, flags); list_for_each_entry(dev_data, &domain->dev_list, list) device_flush_dte(dev_data); - - spin_unlock_irqrestore(&domain->lock, flags); } /**************************************************************************** |