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| author | Dmitry Osipenko <digetx@gmail.com> | 2018-12-12 23:39:05 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2019-01-16 13:54:14 +0100 |
| commit | cc0e1205766b8be1e6f7985991ad80c8c5e791c2 (patch) | |
| tree | ef93224aa4148ea52be755823d367325e3222a32 /drivers/iommu | |
| parent | 5dd82cdb36880e0c87b58a002a0513cfbc18552a (diff) | |
| download | lwn-cc0e1205766b8be1e6f7985991ad80c8c5e791c2.tar.gz lwn-cc0e1205766b8be1e6f7985991ad80c8c5e791c2.zip | |
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')
| -rw-r--r-- | drivers/iommu/tegra-gart.c | 8 |
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; |