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Commit e33acde9 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

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: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent f1ca1512

drivers/iommu/amd_iommu.c

+0 −5
Original line number Diff line number Diff line
@@ -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);

}



/****************************************************************************