[PATCH] iommu: make iommu_bus_notifier return NOTIFY_DONE rather than error code

[Joerg Roedel]

On Tue, Apr 18, 2017 at 08:51:48PM +0800, zhichang.yuan wrote:
> In iommu_bus_notifier(), when action is BUS_NOTIFY_ADD_DEVICE, it will return
> 'ops->add_device(dev)' directly. But ops->add_device will return ERR_VAL, such
> as -ENODEV. These value will make notifier_call_chain() not to traverse the
> remain nodes in struct notifier_block list.
> 
> This patch revises iommu_bus_notifier() to return NOTIFY_DONE when some errors
> heppened in ops->add_device().
> 
> Signed-off-by: zhichang.yuan <yuanzhichang at hisilicon.com>

Applied, thanks.