bnxt_en: Remove an impossible condition check for PTP TX pending SKB

In the current 5750X PTP code paths, there is always at most one TX
SKB requested for timestamp and we won't accept another one until we
have retrieved the timestamp or it has timed out.  Remove the
unnecessary check in bnxt_get_tx_ts_p5() for a pending SKB and change
the function to void.

Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnxt/bnxt.c

@@ -837,12 +837,8 @@ static bool __bnxt_tx_int(struct bnxt *bp, struct bnxt_tx_ring_info *txr,
 		if (unlikely(is_ts_pkt)) {
 			if (BNXT_CHIP_P5(bp)) {
 				/* PTP worker takes ownership of the skb */
-				if (!bnxt_get_tx_ts_p5(bp, skb)) {
-					skb = NULL;
-				} else {
-					atomic64_inc(&bp->ptp_cfg->stats.ts_err);
-					atomic_inc(&bp->ptp_cfg->tx_avail);
-				}
+				bnxt_get_tx_ts_p5(bp, skb);
+				skb = NULL;
 			}
 		}
 

drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c

@@ -750,17 +750,12 @@ static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info)
 	return HZ;
 }
 
-int bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb)
+void bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb)
 {
 	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
 
-	if (ptp->txts_req.tx_skb) {
-		netdev_err(bp->dev, "deferring skb:one SKB is still outstanding\n");
-		return -EBUSY;
-	}
 	ptp->txts_req.tx_skb = skb;
 	ptp_schedule_worker(ptp->ptp_clock, 0);
-	return 0;
 }
 
 int bnxt_get_rx_ts_p5(struct bnxt *bp, u64 *ts, u32 pkt_ts)

drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h

@@ -159,7 +159,7 @@ int bnxt_ptp_cfg_tstamp_filters(struct bnxt *bp);
 void bnxt_ptp_reapply_pps(struct bnxt *bp);
 int bnxt_hwtstamp_set(struct net_device *dev, struct ifreq *ifr);
 int bnxt_hwtstamp_get(struct net_device *dev, struct ifreq *ifr);
-int bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb);
+void bnxt_get_tx_ts_p5(struct bnxt *bp, struct sk_buff *skb);
 int bnxt_get_rx_ts_p5(struct bnxt *bp, u64 *ts, u32 pkt_ts);
 void bnxt_tx_ts_cmp(struct bnxt *bp, struct bnxt_napi *bnapi,
 		    struct tx_ts_cmp *tscmp);