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Message-Id: <20250730121209.303202-17-s.neeraj@samsung.com>
Date: Wed, 30 Jul 2025 17:42:05 +0530
From: Neeraj Kumar <s.neeraj@...sung.com>
To: linux-cxl@...r.kernel.org, nvdimm@...ts.linux.dev,
linux-kernel@...r.kernel.org, gost.dev@...sung.com
Cc: a.manzanares@...sung.com, vishak.g@...sung.com, neeraj.kernel@...il.com,
Neeraj Kumar <s.neeraj@...sung.com>
Subject: [PATCH V2 16/20] cxl/mem: Preserve cxl root decoder during mem
probe
Saved root decoder info is required for cxl region persistency
Signed-off-by: Neeraj Kumar <s.neeraj@...sung.com>
---
drivers/cxl/cxlmem.h | 1 +
drivers/cxl/mem.c | 2 ++
2 files changed, 3 insertions(+)
diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h
index 751478dfc410..72dfcf4671f2 100644
--- a/drivers/cxl/cxlmem.h
+++ b/drivers/cxl/cxlmem.h
@@ -59,6 +59,7 @@ struct cxl_memdev {
struct cxl_nvdimm_bridge *cxl_nvb;
struct cxl_nvdimm *cxl_nvd;
struct cxl_port *endpoint;
+ struct cxl_root_decoder *cxlrd;
int id;
int depth;
u8 scrub_cycle;
diff --git a/drivers/cxl/mem.c b/drivers/cxl/mem.c
index 54501616ff09..1a0da7253a24 100644
--- a/drivers/cxl/mem.c
+++ b/drivers/cxl/mem.c
@@ -152,6 +152,8 @@ static int cxl_mem_probe(struct device *dev)
return -ENXIO;
}
+ cxlmd->cxlrd = cxl_find_root_decoder_by_port(parent_port);
+
if (dport->rch)
endpoint_parent = parent_port->uport_dev;
else
--
2.34.1
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