NFC: protect nci_data_exchange transactions
Protect 'cb' and 'cb_context' arguments in nci_data_exchange.
In fact, this implements a queue with max length of 1 data
exchange transactions in parallel.
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>
diff --git a/net/nfc/nci/ntf.c b/net/nfc/nci/ntf.c
index 8dd7535..96633f5 100644
--- a/net/nfc/nci/ntf.c
+++ b/net/nfc/nci/ntf.c
@@ -215,7 +215,7 @@
}
/* complete the data exchange transaction, if exists */
- if (ndev->data_exchange_cb)
+ if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags))
nci_data_exchange_complete(ndev, NULL, -EIO);
}