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SubjectRe: [PATCH 2/2] powerpc/iommu: check dev->iommu_group before remove a device from iommu_group
On 08/16/2013 08:08 PM, Wei Yang wrote:
> ---
> arch/powerpc/kernel/iommu.c | 3 ++-
> 1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
> index b20ff17..5abf7c3 100644
> --- a/arch/powerpc/kernel/iommu.c
> +++ b/arch/powerpc/kernel/iommu.c
> @@ -1149,7 +1149,8 @@ static int iommu_bus_notifier(struct notifier_block *nb,
> case BUS_NOTIFY_ADD_DEVICE:
> return iommu_add_device(dev);
> case BUS_NOTIFY_DEL_DEVICE:
> - iommu_del_device(dev);
> + if (dev->iommu_group)
> + iommu_del_device(dev);
> return 0;
> default:
> return 0;
>

This one seems redundant, no?


--
Alexey


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