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| author | Joerg Roedel <joerg.roedel@amd.com> | 2011-09-02 14:19:50 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-10-03 11:40:20 -0700 |
| commit | 5c755fc21c8e84aff1230e27646fe4277a19451d (patch) | |
| tree | 1e2961b51886bb7d58a4533eb4d5bbfa28e8d84d | |
| parent | bfa826f82f1383593e18ad180eb816221627a917 (diff) | |
| download | kernel-mfld-blackbay-5c755fc21c8e84aff1230e27646fe4277a19451d.tar.gz kernel-mfld-blackbay-5c755fc21c8e84aff1230e27646fe4277a19451d.tar.bz2 kernel-mfld-blackbay-5c755fc21c8e84aff1230e27646fe4277a19451d.zip | |
iommu/amd: Don't take domain->lock recursivly
commit e33acde91140f1809952d1c135c36feb66a51887 upstream.
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.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | arch/x86/kernel/amd_iommu.c | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 7c3a95e54ec..7b4381154da 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -773,14 +773,9 @@ 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->dev); - - spin_unlock_irqrestore(&domain->lock, flags); } /**************************************************************************** |