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| author | Dan Williams <dan.j.williams@intel.com> | 2022-11-04 03:30:36 +0300 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2022-11-05 01:58:35 +0300 |
| commit | 4d07ae22e79ebc2d7528bbc69daa53b86981cb3a (patch) | |
| tree | 1464e53baab41aaddac96f01b399a4b1b43fee0d /drivers/cxl/cxl.h | |
| parent | 0d9e734018d70cecf79e2e4c6082167160a0f13f (diff) | |
| download | linux-4d07ae22e79ebc2d7528bbc69daa53b86981cb3a.tar.xz | |
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: 04ad63f086d1 ("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.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/cxl/cxl.h')
| -rw-r--r-- | drivers/cxl/cxl.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h index f680450f0b16..1164ad49f3d3 100644 --- a/drivers/cxl/cxl.h +++ b/drivers/cxl/cxl.h @@ -423,7 +423,7 @@ struct cxl_nvdimm { struct device dev; struct cxl_memdev *cxlmd; struct cxl_nvdimm_bridge *bridge; - struct cxl_pmem_region *region; + struct xarray pmem_regions; }; struct cxl_pmem_region_mapping { |