[PATCH v3] libnvdimm/of_pmem: Use devm_kstrdup instead of kstrdup and check its return value

[Chen Ni]

Use devm_kstrdup() instead of kstrdup() and check its return value to
avoid memory leak.

Fixes: 49bddc73d15c ("libnvdimm/of_pmem: Provide a unique name for bus 
provider")
Signed-off-by: Chen Ni <nic...@iscas.ac.cn>
---
Changelog:

v2 -> v3:

1. Use devm_kstrdup() instead of kstrdup()

v1 -> v2:

1. Add a fixes tag.
2. Update commit message.
---
 drivers/nvdimm/of_pmem.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/nvdimm/of_pmem.c b/drivers/nvdimm/of_pmem.c
index 1b9f5b8a6167..5765674b36f2 100644
--- a/drivers/nvdimm/of_pmem.c
+++ b/drivers/nvdimm/of_pmem.c
@@ -30,7 +30,13 @@ static int of_pmem_region_probe(struct platform_device *pdev)
        if (!priv)
                return -ENOMEM;
 
-       priv->bus_desc.provider_name = kstrdup(pdev->name, GFP_KERNEL);
+       priv->bus_desc.provider_name = devm_kstrdup(&pdev->dev, pdev->name,
+                                                       GFP_KERNEL);
+       if (!priv->bus_desc.provider_name) {
+               kfree(priv);
+               return -ENOMEM;
+       }
+
        priv->bus_desc.module = THIS_MODULE;
        priv->bus_desc.of_node = np;
 
-- 
2.25.1