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| author | Joerg Roedel <jroedel@suse.de> | 2020-04-29 15:36:47 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-05-05 14:36:12 +0200 |
| commit | 41df6dcc0a3ff4fb654c3d969ab96ba9c4f0e796 (patch) | |
| tree | 76e3c2b591a1e4811141a1d31ce3a231769b2f6e /drivers/iommu | |
| parent | 6e1aa2049154d7462968c968b20f985859308267 (diff) | |
| download | linux-stable-41df6dcc0a3ff4fb654c3d969ab96ba9c4f0e796.tar.gz linux-stable-41df6dcc0a3ff4fb654c3d969ab96ba9c4f0e796.tar.bz2 linux-stable-41df6dcc0a3ff4fb654c3d969ab96ba9c4f0e796.zip | |
iommu: Keep a list of allocated groups in __iommu_probe_device()
This is needed to defer default_domain allocation for new IOMMU groups
until all devices have been added to the group.
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/20200429133712.31431-10-joro@8bytes.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/iommu.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 7a385c18e1a5..18eb3623bd00 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -44,6 +44,7 @@ struct iommu_group { int id; struct iommu_domain *default_domain; struct iommu_domain *domain; + struct list_head entry; }; struct group_device { @@ -184,7 +185,7 @@ static void dev_iommu_free(struct device *dev) dev->iommu = NULL; } -static int __iommu_probe_device(struct device *dev) +static int __iommu_probe_device(struct device *dev, struct list_head *group_list) { const struct iommu_ops *ops = dev->bus->iommu_ops; struct iommu_device *iommu_dev; @@ -204,6 +205,9 @@ static int __iommu_probe_device(struct device *dev) } iommu_group_put(group); + if (group_list && !group->default_domain && list_empty(&group->entry)) + list_add_tail(&group->entry, group_list); + iommu_device_link(iommu_dev, dev); return 0; @@ -234,7 +238,7 @@ int iommu_probe_device(struct device *dev) if (ops->probe_device) { struct iommu_group *group; - ret = __iommu_probe_device(dev); + ret = __iommu_probe_device(dev, NULL); /* * Try to allocate a default domain - needs support from the @@ -567,6 +571,7 @@ struct iommu_group *iommu_group_alloc(void) group->kobj.kset = iommu_group_kset; mutex_init(&group->mutex); INIT_LIST_HEAD(&group->devices); + INIT_LIST_HEAD(&group->entry); BLOCKING_INIT_NOTIFIER_HEAD(&group->notifier); ret = ida_simple_get(&iommu_group_ida, 0, 0, GFP_KERNEL); |