linux-kernel - [PATCH] libnvdimm, bus: check id immediately following ida_simple

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Message-Id: <1533298113-17495-1-git-send-email-oceanhehy@gmail.com>
Date:   Fri,  3 Aug 2018 08:08:33 -0400
From:   Ocean He <oceanhehy@...il.com>
To:     dan.j.williams@...el.com, ross.zwisler@...ux.intel.com,
        vishal.l.verma@...el.com, dave.jiang@...el.com
Cc:     linux-nvdimm@...ts.01.org, linux-kernel@...r.kernel.org,
        Ocean He <hehy1@...ovo.com>
Subject: [PATCH] libnvdimm, bus: check id immediately following ida_simple_get

From: Ocean He <hehy1@...ovo.com>

The id check was not executed immediately following ida_simple_get. Just
change the codes position, without function change.

Signed-off-by: Ocean He <hehy1@...ovo.com>
---
 drivers/nvdimm/bus.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/nvdimm/bus.c b/drivers/nvdimm/bus.c
index 27902a8..ab28e7c 100644
--- a/drivers/nvdimm/bus.c
+++ b/drivers/nvdimm/bus.c
@@ -350,12 +350,12 @@ struct nvdimm_bus *nvdimm_bus_register(struct device *parent,
 	INIT_LIST_HEAD(&nvdimm_bus->mapping_list);
 	init_waitqueue_head(&nvdimm_bus->probe_wait);
 	nvdimm_bus->id = ida_simple_get(&nd_ida, 0, 0, GFP_KERNEL);
-	mutex_init(&nvdimm_bus->reconfig_mutex);
-	badrange_init(&nvdimm_bus->badrange);
 	if (nvdimm_bus->id < 0) {
 		kfree(nvdimm_bus);
 		return NULL;
 	}
+	mutex_init(&nvdimm_bus->reconfig_mutex);
+	badrange_init(&nvdimm_bus->badrange);
 	nvdimm_bus->nd_desc = nd_desc;
 	nvdimm_bus->dev.parent = parent;
 	nvdimm_bus->dev.release = nvdimm_bus_release;
-- 
1.8.3.1