RDMA/rtrs: server: Fix error handling in get_or_create_srv

[ Upstream commit a338d6e ]

After device_initialize() is called, use put_device() to release the
device according to kernel device management rules. While direct
kfree() work in this case, using put_device() is more correct.

Found by code review.

Fixes: 9cb8374 ("RDMA/rtrs: server: main functionality")
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Link: https://patch.msgid.link/20251110005158.13394-1-make24@iscas.ac.cn
Acked-by: Jack Wang <jinpu.wang@ionos.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: Ma Ke

drivers/infiniband/ulp/rtrs/rtrs-srv.c

@@ -1450,7 +1450,7 @@ static struct rtrs_srv_sess *get_or_create_srv(struct rtrs_srv_ctx *ctx,
 	kfree(srv->chunks);
 
 err_free_srv:
-	kfree(srv);
+	put_device(&srv->dev);
 	return ERR_PTR(-ENOMEM);
 }