RE: [PATCH v8 02/15] virt: coco: tsm: Remove the device from lookup before PCI teardown

[Tian, Kevin]

> From: Aneesh Kumar K.V (Arm) <aneesh.kumar@xxxxxxxxxx>
> Sent: Thursday, November 5, 2026 12:16 AM
> 
> PCI connect looks up a TSM by ID under pci_tsm_rwsem. Previously,
> tsm_unregister() released that lock after tearing down PCI state while
> the TSM was still in the class lookup. A racing connect could then
> attach a new PCI context that the teardown would never see.
> 
> Remove the device from the class lookup first, then take the PCI write
> lock to drain in-flight operations and destroy their contexts. Drop the
> device reference only after PCI teardown completes.
> 
> Fixes: 3225f52cde56 ("PCI/TSM: Establish Secure Sessions and Link Encryption")
> Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@xxxxxxxxxx>

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>

btw this can be sent separately.