diff mbox series

[v2,10/42,SRU,U] iommu: Move new probe_device path to separate function

Message ID 20200602074843.1743493-11-vicamo.yang@canonical.com
State New
Headers show
Series Fix can't find root device on VMD when secureboot enabled | expand

Commit Message

You-Sheng Yang June 2, 2020, 7:48 a.m. UTC 
From: Joerg Roedel <jroedel@suse.de>

BugLink: https://bugs.launchpad.net/bugs/1876707

This makes it easier to remove to old code-path when all drivers are
converted. As a side effect that it also fixes the error cleanup
path.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20200429133712.31431-11-joro@8bytes.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
(cherry picked from commit cf193888bfbd3d57e03a511e49d26f7d9c6f76df
linux-next)
Signed-off-by: You-Sheng Yang <vicamo.yang@canonical.com>
---
 drivers/iommu/iommu.c | 69 ++++++++++++++++++++++++++++---------------
 1 file changed, 46 insertions(+), 23 deletions(-)
diff mbox series

Patch

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 87706d225dba..428ba12c338c 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -219,12 +219,55 @@  static int __iommu_probe_device(struct device *dev, struct list_head *group_list
 	return ret;
 }
 
+static int __iommu_probe_device_helper(struct device *dev)
+{
+	const struct iommu_ops *ops = dev->bus->iommu_ops;
+	struct iommu_group *group;
+	int ret;
+
+	ret = __iommu_probe_device(dev, NULL);
+	if (ret)
+		goto err_out;
+
+	/*
+	 * Try to allocate a default domain - needs support from the
+	 * IOMMU driver. There are still some drivers which don't
+	 * support default domains, so the return value is not yet
+	 * checked.
+	 */
+	iommu_alloc_default_domain(dev);
+
+	group = iommu_group_get(dev);
+	if (!group)
+		goto err_release;
+
+	if (group->default_domain)
+		ret = __iommu_attach_device(group->default_domain, dev);
+
+	iommu_group_put(group);
+
+	if (ret)
+		goto err_release;
+
+	if (ops->probe_finalize)
+		ops->probe_finalize(dev);
+
+	return 0;
+
+err_release:
+	iommu_release_device(dev);
+err_out:
+	return ret;
+
+}
+
 int iommu_probe_device(struct device *dev)
 {
 	const struct iommu_ops *ops = dev->bus->iommu_ops;
 	int ret;
 
 	WARN_ON(dev->iommu_group);
+
 	if (!ops)
 		return -EINVAL;
 
@@ -236,30 +279,10 @@  int iommu_probe_device(struct device *dev)
 		goto err_free_dev_param;
 	}
 
-	if (ops->probe_device) {
-		struct iommu_group *group;
-
-		ret = __iommu_probe_device(dev, NULL);
-
-		/*
-		 * Try to allocate a default domain - needs support from the
-		 * IOMMU driver. There are still some drivers which don't
-		 * support default domains, so the return value is not yet
-		 * checked.
-		 */
-		if (!ret)
-			iommu_alloc_default_domain(dev);
-
-		group = iommu_group_get(dev);
-		if (group && group->default_domain) {
-			ret = __iommu_attach_device(group->default_domain, dev);
-			iommu_group_put(group);
-		}
-
-	} else {
-		ret = ops->add_device(dev);
-	}
+	if (ops->probe_device)
+		return __iommu_probe_device_helper(dev);
 
+	ret = ops->add_device(dev);
 	if (ret)
 		goto err_module_put;