NFC: nci: Change NCI state machine to LISTEN_ACTIVE

When receiving an interface activation notification, if
the RF interface is NCI_RF_INTERFACE_NFCEE_DIRECT, we
need to ignore the following parameters and change the NCI
state machine to NCI_LISTEN_ACTIVE. According to the NCI
specification, the parameters should be 0 and shall be
ignored.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/net/nfc/nci/ntf.c b/net/nfc/nci/ntf.c
index 5924b812fb6a..33f5f00ecf4c 100644
--- a/net/nfc/nci/ntf.c
+++ b/net/nfc/nci/ntf.c
@@ -541,6 +541,13 @@ static void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev,
         pr_debug("rf_tech_specific_params_len %d\n",
                  ntf.rf_tech_specific_params_len);
 
+        /* If this contains a value of 0x00 (NFCEE Direct RF
+         * Interface) then all following parameters SHALL contain a
+         * value of 0 and SHALL be ignored.
+         */
+        if (ntf.rf_interface == NCI_RF_INTERFACE_NFCEE_DIRECT)
+                goto listen;
+
         if (ntf.rf_tech_specific_params_len > 0) {
                 switch (ntf.activation_rf_tech_and_mode) {
                 case NCI_NFC_A_PASSIVE_POLL_MODE:
@@ -653,6 +660,7 @@ exit:
                         nci_req_complete(ndev, err);
                 }
         } else {
+listen:
                 /* Listen mode */
                 atomic_set(&ndev->state, NCI_LISTEN_ACTIVE);
                 if (err == NCI_STATUS_OK &&