um: vfio: Prevent duplicate device assignments
authorTiwei Bie <tiwei.btw@antgroup.com>
Fri, 6 Jun 2025 12:44:27 +0000 (20:44 +0800)
committerJohannes Berg <johannes.berg@intel.com>
Wed, 25 Jun 2025 07:26:06 +0000 (09:26 +0200)
commitbc4e2ae08183d9017f43bf88aa7cfdf84e76f573
tree5bf87d6f8c99b4dc4bdaafe3ce88fe32a8d1b4ca
parentc55c7a85e02a7bfee20a3ffebdff7cbeb41613ef
um: vfio: Prevent duplicate device assignments

Ensure devices are assigned only once. Reject subsequent requests
for duplicate assignments.

Fixes: a0e2cb6a9063 ("um: Add VFIO-based virtual PCI driver")
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
Link: https://patch.msgid.link/20250606124428.148164-4-tiwei.btw@antgroup.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
arch/um/drivers/vfio_kern.c