cxl/pmem: Fix cxl_pmem_region and cxl_memdev leak
When a cxl_nvdimm object goes through a ->remove() event (device physically removed, nvdimm-bridge disabled, or nvdimm device disabled), then any associated regions must also be disabled. As highlighted by the cxl-create-region.sh test [1], a single device may host multiple regions, but the driver was only tracking one region at a time. This leads to a situation where only the last enabled region per nvdimm device is cleaned up properly. Other regions are leaked, and this also causes cxl_memdev reference leaks. Fix the tracking by allowing cxl_nvdimm objects to track multiple region associations. Cc: <stable@vger.kernel.org> Link: https://github.com/pmem/ndctl/blob/main/test/cxl-create-region.sh [1] Reported-by:Vishal Verma <vishal.l.verma@intel.com> Fixes: 04ad63f0 ("cxl/region: Introduce cxl_pmem_region objects") Reviewed-by:
Dave Jiang <dave.jiang@intel.com> Reviewed-by:
Vishal Verma <vishal.l.verma@intel.com> Link: https://lore.kernel.org/r/166752183647.947915.2045230911503793901.stgit@dwillia2-xfh.jf.intel.comSigned-off-by:
Dan Williams <dan.j.williams@intel.com>
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