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authorDmitry Osipenko <digetx@gmail.com>2018-12-12 23:39:05 +0300
committerJoerg Roedel <jroedel@suse.de>2019-01-16 15:54:14 +0300
commitcc0e1205766b8be1e6f7985991ad80c8c5e791c2 (patch)
treeef93224aa4148ea52be755823d367325e3222a32 /drivers/iommu/tegra-gart.c
parent5dd82cdb36880e0c87b58a002a0513cfbc18552a (diff)
downloadlinux-cc0e1205766b8be1e6f7985991ad80c8c5e791c2.tar.xz
iommu/tegra: gart: Don't detach devices from inactive domains
There could be unlimited number of allocated domains, but only one domain can be active at a time. Hence devices must be detached only from the active domain. Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/tegra-gart.c')
-rw-r--r--drivers/iommu/tegra-gart.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index a3ce6918577d..74c9be13f043 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -171,7 +171,7 @@ static int gart_iommu_attach_dev(struct iommu_domain *domain,
struct device *dev)
{
struct gart_domain *gart_domain = to_gart_domain(domain);
- struct gart_device *gart = gart_domain->gart;
+ struct gart_device *gart = gart_handle;
struct gart_client *client, *c;
int err = 0;
@@ -195,6 +195,7 @@ static int gart_iommu_attach_dev(struct iommu_domain *domain,
goto fail;
}
gart->active_domain = domain;
+ gart_domain->gart = gart;
list_add(&client->list, &gart->client);
spin_unlock(&gart->client_lock);
dev_dbg(gart->dev, "Attached %s\n", dev_name(dev));
@@ -217,8 +218,10 @@ static void __gart_iommu_detach_dev(struct iommu_domain *domain,
if (c->dev == dev) {
list_del(&c->list);
kfree(c);
- if (list_empty(&gart->client))
+ if (list_empty(&gart->client)) {
gart->active_domain = NULL;
+ gart_domain->gart = NULL;
+ }
dev_dbg(gart->dev, "Detached %s\n", dev_name(dev));
return;
}
@@ -254,7 +257,6 @@ static struct iommu_domain *gart_iommu_domain_alloc(unsigned type)
if (!gart_domain)
return NULL;
- gart_domain->gart = gart;
gart_domain->domain.geometry.aperture_start = gart->iovmm_base;
gart_domain->domain.geometry.aperture_end = gart->iovmm_base +
gart->page_count * GART_PAGE_SIZE - 1;