Thread (78 messages) 78 messages, 7 authors, 2021-08-25
STALE1744d
Revisions (3)
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[PATCH v3 11/14] device-dax: ensure dev_dax->pgmap is valid for dynamic devices

From: Joao Martins <hidden>
Date: 2021-07-14 19:36:42
Also in: linux-mm, nvdimm
Subsystem: device direct access (dax), the rest · Maintainers: Dan Williams, Vishal Verma, Dave Jiang, Linus Torvalds

Right now, only static dax regions have a valid @pgmap pointer in its
struct dev_dax. Dynamic dax case however, do not.

In preparation for device-dax compound pagemap support, make sure that
dev_dax pgmap field is set after it has been allocated and initialized.

Suggested-by: Dan Williams <redacted>
Signed-off-by: Joao Martins <redacted>
---
 drivers/dax/device.c | 2 ++
 1 file changed, 2 insertions(+)
diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index 0b82159b3564..6e348b5f9d45 100644
--- a/drivers/dax/device.c
+++ b/drivers/dax/device.c
@@ -426,6 +426,8 @@ int dev_dax_probe(struct dev_dax *dev_dax)
 	}
 
 	pgmap->type = MEMORY_DEVICE_GENERIC;
+	dev_dax->pgmap = pgmap;
+
 	addr = devm_memremap_pages(dev, pgmap);
 	if (IS_ERR(addr))
 		return PTR_ERR(addr);
-- 
2.17.1
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