[PATCH] dax: Check dev_set_name() return value

[Bo Liu]

It's possible that dev_set_name() returns -ENOMEM, catch and handle this.

Signed-off-by: Bo Liu <liub...@inspur.com>
---
 drivers/dax/bus.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index 1dad813ee4a6..36cf245ee467 100644
--- a/drivers/dax/bus.c
+++ b/drivers/dax/bus.c
@@ -765,7 +765,12 @@ static int devm_register_dax_mapping(struct dev_dax 
*dev_dax, int range_id)
        device_initialize(dev);
        dev->parent = &dev_dax->dev;
        dev->type = &dax_mapping_type;
-       dev_set_name(dev, "mapping%d", mapping->id);
+       rc = dev_set_name(dev, "mapping%d", mapping->id);
+       if (rc) {
+               kfree(mapping);
+               return rc;
+       }
+
        rc = device_add(dev);
        if (rc) {
                put_device(dev);
@@ -1334,7 +1339,9 @@ struct dev_dax *devm_create_dev_dax(struct dev_dax_data 
*data)
        dev_dax->region = dax_region;
        dev = &dev_dax->dev;
        device_initialize(dev);
-       dev_set_name(dev, "dax%d.%d", dax_region->id, dev_dax->id);
+       rc = dev_set_name(dev, "dax%d.%d", dax_region->id, dev_dax->id);
+       if (rc)
+               goto err_range;
 
        rc = alloc_dev_dax_range(dev_dax, dax_region->res.start, data->size);
        if (rc)
-- 
2.27.0