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| author | Joerg Roedel <jroedel@suse.de> | 2015-05-28 19:41:27 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2015-06-05 16:13:10 +0300 |
| commit | 8da30142a21e2d7595510892a4c99cf294f7e6f1 (patch) | |
| tree | 0f1fa73de54a9165c9ae749bb829d3f9cbb302b5 /drivers/iommu | |
| parent | 19762d7095e6392b6ec56c363a6f29b2119488c2 (diff) | |
| download | linux-8da30142a21e2d7595510892a4c99cf294f7e6f1.tar.xz | |
iommu: Clean up after a failed bus initialization
Make sure we call the ->remove_device call-back on all
devices already initialized with ->add_device when the bus
initialization fails.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/iommu.c | 35 |
1 files changed, 26 insertions, 9 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 9c9336a923cd..f0e0a233c902 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -753,6 +753,17 @@ static int add_iommu_group(struct device *dev, void *data) return ops->add_device(dev); } +static int remove_iommu_group(struct device *dev, void *data) +{ + struct iommu_callback_data *cb = data; + const struct iommu_ops *ops = cb->ops; + + if (ops->remove_device && dev->iommu_group) + ops->remove_device(dev); + + return 0; +} + static int iommu_bus_notifier(struct notifier_block *nb, unsigned long action, void *data) { @@ -821,19 +832,25 @@ static int iommu_bus_init(struct bus_type *bus, const struct iommu_ops *ops) nb->notifier_call = iommu_bus_notifier; err = bus_register_notifier(bus, nb); - if (err) { - kfree(nb); - return err; - } + if (err) + goto out_free; err = bus_for_each_dev(bus, NULL, &cb, add_iommu_group); - if (err) { - bus_unregister_notifier(bus, nb); - kfree(nb); - return err; - } + if (err) + goto out_err; + return 0; + +out_err: + /* Clean up */ + bus_for_each_dev(bus, NULL, &cb, remove_iommu_group); + bus_unregister_notifier(bus, nb); + +out_free: + kfree(nb); + + return err; } /** |