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[PATCH v2 05/05] iommu/ipmmu-vmsa: Clean up device tracking

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  [PATCH v2 05/05] iommu/ipmmu-vmsa: Clean up device tracking Magnus Damm <magnus.damm@gmail.com> - 2017-07-17 15:10 +0200

#1689019 — [PATCH v2 05/05] iommu/ipmmu-vmsa: Clean up device tracking

From: Robin Murphy <robin.murphy@arm.com>

Get rid of now unused device tracking code. Future code should instead
be able to use driver_for_each_device() for this purpose.

This is a simplified version of the following patch from Robin
[PATCH] iommu/ipmmu-vmsa: Clean up group allocation

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Magnus Damm <damm+renesas@opensource.se>
---

 Change since V1:
 - New patch

 drivers/iommu/ipmmu-vmsa.c |   12 ------------
 1 file changed, 12 deletions(-)

--- 0008/drivers/iommu/ipmmu-vmsa.c
+++ work/drivers/iommu/ipmmu-vmsa.c	2017-07-17 21:35:26.690607110 +0900
@@ -37,7 +37,6 @@ struct ipmmu_vmsa_device {
 	struct device *dev;
 	void __iomem *base;
 	struct iommu_device iommu;
-	struct list_head list;
 
 	unsigned int num_utlbs;
 	spinlock_t lock;			/* Protects ctx and domains[] */
@@ -64,9 +63,6 @@ struct ipmmu_vmsa_iommu_priv {
 	struct list_head list;
 };
 
-static DEFINE_SPINLOCK(ipmmu_devices_lock);
-static LIST_HEAD(ipmmu_devices);
-
 static struct ipmmu_vmsa_domain *to_vmsa_domain(struct iommu_domain *dom)
 {
 	return container_of(dom, struct ipmmu_vmsa_domain, io_domain);
@@ -970,10 +966,6 @@ static int ipmmu_probe(struct platform_d
 	 * ipmmu_init() after the probe function returns.
 	 */
 
-	spin_lock(&ipmmu_devices_lock);
-	list_add(&mmu->list, &ipmmu_devices);
-	spin_unlock(&ipmmu_devices_lock);
-
 	platform_set_drvdata(pdev, mmu);
 
 	return 0;
@@ -983,10 +975,6 @@ static int ipmmu_remove(struct platform_
 {
 	struct ipmmu_vmsa_device *mmu = platform_get_drvdata(pdev);
 
-	spin_lock(&ipmmu_devices_lock);
-	list_del(&mmu->list);
-	spin_unlock(&ipmmu_devices_lock);
-
 	iommu_device_unregister(&mmu->iommu);
 
 #if defined(CONFIG_ARM) && !defined(CONFIG_IOMMU_DMA)

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