From: Ilan Elias <ilane@xxxxxx>
Check if NCI data flow control is used in nci_tx_work.
Signed-off-by: Ilan Elias <ilane@xxxxxx>
---
include/net/nfc/nci.h | 3 +++
net/nfc/nci/core.c | 5 ++++-
2 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/include/net/nfc/nci.h b/include/net/nfc/nci.h
index 0b34fde..cdbe671 100644
--- a/include/net/nfc/nci.h
+++ b/include/net/nfc/nci.h
@@ -108,6 +108,9 @@
/* NCI Static RF connection ID */
#define NCI_STATIC_RF_CONN_ID 0x00
+/* NCI Data Flow Control */
+#define NCI_DATA_FLOW_CONTROL_NOT_USED 0xff
+
/* NCI RF_DISCOVER_MAP_CMD modes */
#define NCI_DISC_MAP_MODE_POLL 0x01
#define NCI_DISC_MAP_MODE_LISTEN 0x02
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index 803f6d1..fe5ca89 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -723,7 +723,10 @@ static void nci_tx_work(struct work_struct *work)
if (!skb)
return;
- atomic_dec(&ndev->credits_cnt);
+ /* Check if data flow control is used */
+ if (atomic_read(&ndev->credits_cnt) !=
+ NCI_DATA_FLOW_CONTROL_NOT_USED)
+ atomic_dec(&ndev->credits_cnt);
nfc_dbg("NCI TX: MT=data, PBF=%d, conn_id=%d, plen=%d",
nci_pbf(skb->data),
--
1.7.0.4
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