NFC: Ignore err when chip doesn't implement HW/SW info registers

NFC_HCI_ID_MGMT_VERSION_SW and NFC_HCI_ID_MGMT_VERSION_HW are optional
registers for gate NFC_HCI_ID_MGMT_GATE in standard HCI. When chip
doesn't implement, just leave all the information as zeros.

Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/net/nfc/hci/core.c b/net/nfc/hci/core.c
index bc571b0efb92..a58db89b4555 100644
--- a/net/nfc/hci/core.c
+++ b/net/nfc/hci/core.c
@@ -38,6 +38,8 @@ static int nfc_hci_result_to_errno(u8 result)
         switch (result) {
         case NFC_HCI_ANY_OK:
                 return 0;
+        case NFC_HCI_ANY_E_REG_PAR_UNKNOWN:
+                return -EOPNOTSUPP;
         case NFC_HCI_ANY_E_TIMEOUT:
                 return -ETIME;
         default:
@@ -419,6 +421,10 @@ static int hci_dev_version(struct nfc_hci_dev *hdev)
 
         r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
                               NFC_HCI_ID_MGMT_VERSION_SW, &skb);
+        if (r == -EOPNOTSUPP) {
+                pr_info("Software/Hardware info not available\n");
+                return 0;
+        }
         if (r < 0)
                 return r;