Commit 261a02b9 authored by Alison Schofield's avatar Alison Schofield Committed by Dave Jiang
Browse files

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: default avatarAlison Schofield <alison.schofield@intel.com>
Reviewed-by: default avatarAlejandro Lucero <alucerop@amd.com>
Link: https://patch.msgid.link/20260331005047.2813980-1-alison.schofield@intel.com


Signed-off-by: default avatarDave Jiang <dave.jiang@intel.com>
parent 7974835a

drivers/cxl/core/memdev.c

+3 −0
Original line number Diff line number Diff line
@@ -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);

}