在 2022/12/4 4:49, Ira Weiny 写道:
On Sat, Dec 03, 2022 at 09:58:58AM +, Yongqiang Liu wrote:
We should always call dax_region_put() whenever devm_create_dev_dax()
succeed or fail to avoid refcount leak of dax_region. Move the return
value check after dax_region_put().
I think dax_region_put is called from dax_region_unregister() automatically on
tear down.
Yes, Thanks for your explanation.
Fixes: c01044cc8191 ("ACPI: HMAT: refactor hmat_register_target_device to
hmem_register_device")
I'm also not sure how this patch is related to this fix.
Ira
Signed-off-by: Yongqiang Liu
---
drivers/dax/hmem/hmem.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/dax/hmem/hmem.c b/drivers/dax/hmem/hmem.c
index 1bf040dbc834..09f5cd7b6c8e 100644
--- a/drivers/dax/hmem/hmem.c
+++ b/drivers/dax/hmem/hmem.c
@@ -36,12 +36,11 @@ static int dax_hmem_probe(struct platform_device *pdev)
.size = region_idle ? 0 : resource_size(res),
};
dev_dax = devm_create_dev_dax();
- if (IS_ERR(dev_dax))
- return PTR_ERR(dev_dax);
/* child dev_dax instances now own the lifetime of the dax_region */
dax_region_put(dax_region);
- return 0;
+
+ return IS_ERR(dev_dax) ? PTR_ERR(dev_dax) : 0;
}
static int dax_hmem_remove(struct platform_device *pdev)
--
2.25.1
.
