4.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christophe Ricard <[email protected]>

commit adca3c38d807b341a965d0aba8721d0784d8471b upstream.

When NFC_ATTR_VENDOR_DATA is not set, data_len is 0 and data is NULL.

Fixes the following warning:

net/nfc/netlink.c:1536:3: warning: 'data' may be used uninitialized
+in this function [-Wmaybe-uninitialized]
      return cmd->doit(dev, data, data_len);

Signed-off-by: Christophe Ricard <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
 net/nfc/netlink.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -1524,6 +1524,7 @@ static int nfc_genl_vendor_cmd(struct sk
                if (data_len == 0)
                        return -EINVAL;
        } else {
+               data = NULL;
                data_len = 0;
        }
 


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