Re: [PATCH RFC v4 1/4] iommu/arm-smmu-v3: Skip duplicate SIDs when erasing streams from RB tree

[Peng Fan]

On Thu, Oct 01, 2026 at 09:07:18AM -0700, Nicolin Chen wrote:
>On Thu, Oct 01, 2026 at 08:49:58PM +0800, Peng Fan (OSS) wrote:
>> From: Peng Fan <peng.fan@xxxxxxx>
>> 
>> Bridged PCI devices may end up with duplicated Stream IDs in
>> master->streams[].  During insertion, rb_find_add() silently
>> drops the duplicate node when it collides with an already-inserted
>> entry from the same master, leaving the duplicate's rb_node in an
>> uninitialized state.
>
>There is already a cleaner fix:
>https://lore.kernel.org/linux-iommu/76c5f9dde30269995ef842a12a3a5e1ebaa3e6df.1790188510.git.nicolinc@xxxxxxxxxx/

ok. I will drop patch 1 in v5.

Thanks
Peng

>
>Hopefully Will can take it soon.
>
>Nicolin
>