diff options
| author | Alison Schofield <alison.schofield@intel.com> | 2026-03-30 17:50:45 -0700 |
|---|---|---|
| committer | Dave Jiang <dave.jiang@intel.com> | 2026-03-31 15:18:06 -0700 |
| commit | 261a02b93d9b6dfdc49b3e675be1a0e677cf71f3 (patch) | |
| tree | c52d09ac186e0a6c7f5e76472b99b8941d6a154f /drivers/cxl | |
| parent | 7974835aa9d54125a1b6a2948f927d745748bf46 (diff) | |
cxl/core: Check existence of cxl_memdev_state in poison test
Before now, all CXL memdevs were assumed to have a mailbox-backed
cxl_memdev_state, so poison command checks could safely dereference
the @mds.
With the introduction of Type 2 devices, a memdev may not implement
a mailbox interface, and so there is no associated cxl_memdev_state.
Guard against this case by returning false when @mds is absent.
Signed-off-by: Alison Schofield <alison.schofield@intel.com>
Reviewed-by: Alejandro Lucero <alucerop@amd.com>
Link: https://patch.msgid.link/20260331005047.2813980-1-alison.schofield@intel.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Diffstat (limited to 'drivers/cxl')
| -rw-r--r-- | drivers/cxl/core/memdev.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/cxl/core/memdev.c b/drivers/cxl/core/memdev.c index 273c22118d3d..591425866045 100644 --- a/drivers/cxl/core/memdev.c +++ b/drivers/cxl/core/memdev.c @@ -204,6 +204,9 @@ bool cxl_memdev_has_poison_cmd(struct cxl_memdev *cxlmd, { struct cxl_memdev_state *mds = to_cxl_memdev_state(cxlmd->cxlds); + if (!mds) + return 0; + return test_bit(cmd, mds->poison.enabled_cmds); } |