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iommu/amd: Don't take domain->lock recursivly

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commit e33acde911 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>
This commit is contained in:
Joerg Roedel 2011-09-02 14:19:50 +02:00 committed by Greg Kroah-Hartman
parent bfa826f82f
commit 5c755fc21c
1 changed files with 0 additions and 5 deletions
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5
arch/x86/kernel/amd_iommu.c
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@ -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);
}
/****************************************************************************