dax/bus: Use dax_region_put() in alloc_dax_region() error path

alloc_dax_region() calls kref_init() on the dax_region early in the
function, but the error path for sysfs_create_groups() failure uses
kfree() directly to free the dax_region. This bypasses the kref lifecycle.

Use dax_region_put() instead to handle kref lifecycle correctly.

Suggested-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://patch.msgid.link/20260322195343.206900-2-Smita.KoralahalliChannabasappa@amd.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>

diff --git a/drivers/dax/bus.c b/drivers/dax/bus.c
index c94c09622516e023073174115a7d2a872669973b..299134c9b2946c20e02da6f84c1c8a5015f6d67b 100644 (file)
--- a/drivers/dax/bus.c
+++ b/drivers/dax/bus.c
@@ -668,7 +668,7 @@ struct dax_region *alloc_dax_region(struct device *parent, int region_id,
        };
 
        if (sysfs_create_groups(&parent->kobj, dax_region_attribute_groups)) {
-               kfree(dax_region);
+               dax_region_put(dax_region);
                return NULL;
        }