Re: [PATCH v4 02/18] PCI/P2PDMA: Wait for RCU readers before freeing state

On Fri, 21 Aug 2026 22:38:33 +0300, Leon Romanovsky [off-list ref] wrote:

pci_p2pmem_find_many() scans all PCI devices without locking or
protection against driver unbind, including devices with poolless
P2PDMA state. pci_has_p2pmem() may observe pdev->p2pdma just before
driver unbind clears it, while pci_p2pdma_release() skips the grace
period when no pool is present. This allows devres to free the object
while it is still in use.

[...]

Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>

-- 
Jason