[PATCH 1/1] iw_cxgb4: check return value of alloc_skb

[Pan Bian]

Function alloc_skb() will return a NULL pointer when there is no enough
memory. However, the return value of alloc_skb() is directly used
without validation in function send_fw_pass_open_req(). This patches
checks the return value of alloc_skb() against NULL.

Signed-off-by: Pan Bian <bianpan2...@163.com>
---
 drivers/infiniband/hw/cxgb4/cm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index 03a1b0e..196969c 100644
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -3800,6 +3800,8 @@ static void send_fw_pass_open_req(struct c4iw_dev *dev, 
struct sk_buff *skb,
        int ret;
 
        req_skb = alloc_skb(sizeof(struct fw_ofld_connection_wr), GFP_KERNEL);
+       if (!req_skb)
+               return;
        req = (struct fw_ofld_connection_wr *)__skb_put(req_skb, sizeof(*req));
        memset(req, 0, sizeof(*req));
        req->op_compl = htonl(WR_OP_V(FW_OFLD_CONNECTION_WR) | FW_WR_COMPL_F);
-- 
1.9.1