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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2019-02-01 01:54:21 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-01 10:04:08 +0100 |
| commit | ea4f640025183860792063ba5852aec60704ad8e (patch) | |
| tree | a535928cb8aa9494bf5a097fffae1c1ad6ba244d /drivers/iommu | |
| parent | driver core: Do not call rpm_put_suppliers() in pm_runtime_drop_link() (diff) | |
| download | linux-ea4f640025183860792063ba5852aec60704ad8e.tar.xz linux-ea4f640025183860792063ba5852aec60704ad8e.zip | |
IOMMU: Make dwo drivers use stateless device links
The device links used by rockchip-iommu and exynos-iommu are
completely managed by these drivers within the IOMMU framework,
so there is no reason to involve the driver core in the management
of these links.
For this reason, make rockchip-iommu and exynos-iommu pass
DL_FLAG_STATELESS in flags to device_link_add(), so that the device
links used by them are stateless.
[Note that this change is requisite for a subsequent one that will
rework the management of stateful device links in the driver core
and it will not be compatible with the two drivers in question any
more.]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/exynos-iommu.c | 1 | ||||
| -rw-r--r-- | drivers/iommu/rockchip-iommu.c | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 1bd0cd7168df..05c6bc099d62 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -1260,6 +1260,7 @@ static int exynos_iommu_add_device(struct device *dev) * direct calls to pm_runtime_get/put in this driver. */ data->link = device_link_add(dev, data->sysmmu, + DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME); } iommu_group_put(group); diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c index c9ba9f377f63..77d4bd93fe4b 100644 --- a/drivers/iommu/rockchip-iommu.c +++ b/drivers/iommu/rockchip-iommu.c @@ -1071,7 +1071,8 @@ static int rk_iommu_add_device(struct device *dev) iommu_group_put(group); iommu_device_link(&iommu->iommu, dev); - data->link = device_link_add(dev, iommu->dev, DL_FLAG_PM_RUNTIME); + data->link = device_link_add(dev, iommu->dev, + DL_FLAG_STATELESS | DL_FLAG_PM_RUNTIME); return 0; } |