Re: [PATCH] iommu/amd: Convert from atomic_t to refcount_t on device_state->count

[Will Deacon]

On Mon, Jul 19, 2021 at 02:00:37PM +0800, Xiyu Yang wrote:
> refcount_t type and corresponding API can protect refcounters from
> accidental underflow and overflow and further use-after-free situations.
> 
> Signed-off-by: Xiyu Yang <xiyuyang19@xxxxxxxxxxxx>
> Signed-off-by: Xin Tan <tanxin.ctf@xxxxxxxxx>
> ---
>  drivers/iommu/amd/iommu_v2.c | 11 ++++++-----
>  1 file changed, 6 insertions(+), 5 deletions(-)

Can pasid_state::count be converted similarly?

Will