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Re: [PATCH 01/16] iommu: Add checks before calling iommu suspend/resume
- To: Mykola Kvach <xakep.amatop@xxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 5 Mar 2025 17:45:25 +0100
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- Cc: Mykyta Poturai <mykyta_poturai@xxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Mykola Kvach <mykola_kvach@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 05 Mar 2025 16:45:31 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 05.03.2025 10:11, Mykola Kvach wrote:
> --- a/xen/drivers/passthrough/iommu.c
> +++ b/xen/drivers/passthrough/iommu.c
> @@ -613,7 +613,7 @@ int __init iommu_setup(void)
>
> int iommu_suspend(void)
> {
> - if ( iommu_enabled )
> + if ( iommu_enabled && iommu_get_ops() && iommu_get_ops()->suspend )
> return iommu_call(iommu_get_ops(), suspend);
>
> return 0;
> @@ -621,7 +621,7 @@ int iommu_suspend(void)
>
> void iommu_resume(void)
> {
> - if ( iommu_enabled )
> + if ( iommu_enabled && iommu_get_ops() && iommu_get_ops()->resume )
> iommu_vcall(iommu_get_ops(), resume);
> }
When iommu_enabled is true, surely iommu_get_ops() is required to return
non-NULL?
Jan
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