NFC: implicitly deactivate in nci_start_poll

When start_poll is called, and a target was implicitly activated,
we need to implicitly deactivate it.
On the other hand, when the target was activated by the user,
we should not deactivate it.

Signed-off-by: Ilan Elias <ilane@ti.com>
Acked-by: Lauro Ramos Venancio <lauro.venancio@openbossa.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index c3dfd4e13bd5..9f17e8ec0ab9 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -361,8 +361,13 @@ static int nci_start_poll(struct nfc_dev *nfc_dev, __u32 protocols)
                 return -EBUSY;
         }
 
+        if (ndev->target_active_prot) {
+                nfc_err("there is an active target");
+                return -EBUSY;
+        }
+
         if (test_bit(NCI_POLL_ACTIVE, &ndev->flags)) {
-                nfc_dbg("target already active, first deactivate...");
+                nfc_dbg("target is active, implicitly deactivate...");
 
                 rc = nci_request(ndev, nci_rf_deactivate_req, 0,
                         msecs_to_jiffies(NCI_RF_DEACTIVATE_TIMEOUT));