From: Liu Yuan <tailai...@taobao.com>

It should check if strict_strtoul() succeeds before using
'wqm_quanta_value'.

Signed-off-by: Liu Yuan <tailai...@taobao.com>
---
 drivers/infiniband/hw/nes/nes.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/infiniband/hw/nes/nes.c b/drivers/infiniband/hw/nes/nes.c
index 13de119..119d60d 100644
--- a/drivers/infiniband/hw/nes/nes.c
+++ b/drivers/infiniband/hw/nes/nes.c
@@ -1138,7 +1138,9 @@ static ssize_t nes_store_wqm_quanta(struct device_driver 
*ddp,
        u32 i = 0;
        struct nes_device *nesdev;
 
-       strict_strtoul(buf, 0, &wqm_quanta_value);
+       if (strict_strtoul(buf, 0, &wqm_quanta_value) < 0)
+               return -EINVAL;
+
        list_for_each_entry(nesdev, &nes_dev_list, list) {
                if (i == ee_flsh_adapter) {
                        nesdev->nesadapter->wqm_quanta = wqm_quanta_value;
-- 
1.7.1

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