On 04/10/2021 12:38, Will Deacon wrote:
Hi Will,
To avoid this, stop using double-negatives, like !iova_magazine_full() and
!iova_magazine_empty(), and use positive tests, like
iova_magazine_has_space() and iova_magazine_has_pfns(), respectively; these
can safely deal with cpu_rcache->{loaded,
On Fri, Sep 24, 2021 at 06:01:57PM +0800, John Garry wrote:
> A similar crash to the following could be observed if initial CPU rcache
> magazine allocations fail in init_iova_rcaches():
>
> Unable to handle kernel NULL pointer dereference at virtual address
>
> Mem abort info:
>
A similar crash to the following could be observed if initial CPU rcache
magazine allocations fail in init_iova_rcaches():
Unable to handle kernel NULL pointer dereference at virtual address
Mem abort info:
free_iova_fast+0xfc/0x280
iommu_dma_free_iova+0x64/0x70
__iommu_dm
