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Commit cafd2545 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu/amd: Remove device binding reference count 



This reference count is not used anymore, as all devices in
an alias group are now attached and detached together.

Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 397111ab

drivers/iommu/amd_iommu.c

+0 −3
Original line number Diff line number Diff line
@@ -96,7 +96,6 @@ struct iommu_dev_data { 
	struct list_head alias_list;      /* Link alias-groups together */

	struct iommu_dev_data *alias_data;/* The alias dev_data */

	struct protection_domain *domain; /* Domain the device is bound to */

	atomic_t bind;			  /* Domain attach reference count */

	u16 devid;			  /* PCI Device ID */

	bool iommu_v2;			  /* Device can make use of IOMMUv2 */

	bool passthrough;		  /* Default for device is pt_domain */
@@ -139,7 +138,6 @@ static struct iommu_dev_data *alloc_dev_data(u16 devid) 
	INIT_LIST_HEAD(&dev_data->alias_list);



	dev_data->devid = devid;

	atomic_set(&dev_data->bind, 0);



	spin_lock_irqsave(&dev_data_list_lock, flags);

	list_add_tail(&dev_data->dev_data_list, &dev_data_list);
@@ -3179,7 +3177,6 @@ static void cleanup_domain(struct protection_domain *domain) 
		entry = list_first_entry(&domain->dev_list,

					 struct iommu_dev_data, list);

		__detach_device(entry);

		atomic_set(&entry->bind, 0);

	}



	write_unlock_irqrestore(&amd_iommu_devtable_lock, flags);