From: Nishanth Aravamudan <nacc@us.ibm.com>
Date: Wed, 15 Sep 2010 08:05:48 +0000 (+0000)
Subject: powerpc/viobus: Free TCE table on device release
X-Git-Tag: v2.6.37-rc1~180^2~32
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=45848e0fc1fce399651b3f480bdeb82cc6d3d15a;p=~shefty%2Frdma-dev.git

powerpc/viobus: Free TCE table on device release

Release the TCE table as the XXX suggests, except on FW_FEATURE_ISERIES,
where the tables are allocated globally and reused.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---

diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index 72db4b02176..d692989a431 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -1184,7 +1184,12 @@ EXPORT_SYMBOL(vio_unregister_driver);
 /* vio_dev refcount hit 0 */
 static void __devinit vio_dev_release(struct device *dev)
 {
-	/* XXX should free TCE table */
+	struct iommu_table *tbl = get_iommu_table_base(dev);
+
+	/* iSeries uses a common table for all vio devices */
+	if (!firmware_has_feature(FW_FEATURE_ISERIES) && tbl)
+		iommu_free_table(tbl, dev->of_node ?
+			dev->of_node->full_name : dev_name(dev));
 	of_node_put(dev->of_node);
 	kfree(to_vio_dev(dev));
 }