net: macb driver, check for SKBTX_HW_TSTAMP

[thirdparty/kernel/stable.git] / drivers / net / ethernet / cadence / macb_main.c

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 1522aee81884bdf702b32e1cd8cbae4316e988b5..3da2795e248638abbc8d50a194dd8061325aad41 100644 (file)
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -898,7 +898,9 @@ static void macb_tx_interrupt(struct macb_queue *queue)
 
                        /* First, update TX stats if needed */
                        if (skb) {
-                               if (gem_ptp_do_txstamp(queue, skb, desc) == 0) {
+                               if (unlikely(skb_shinfo(skb)->tx_flags &
+                                            SKBTX_HW_TSTAMP) &&
+                                   gem_ptp_do_txstamp(queue, skb, desc) == 0) {
                                        /* skb now belongs to timestamp buffer
                                         * and will be removed later
                                         */