netdev - [PATCH net-next v2 07/10] bnxt_en: Remove an impossible condition check for PTP TX pending SKB

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Fri, 28 Jun 2024 12:30:02 -0700
From: Michael Chan <michael.chan@...adcom.com>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	pavan.chebbi@...adcom.com,
	andrew.gospodarek@...adcom.com,
	richardcochran@...il.com,
	horms@...nel.org,
	przemyslaw.kitszel@...el.com
Subject: [PATCH net-next v2 07/10] bnxt_en: Remove an impossible condition check for PTP TX pending SKB

From: Pavan Chebbi <pavan.chebbi@...adcom.com>

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@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c     | 8 ++------
 drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 7 +------
 drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h | 2 +-
 3 files changed, 4 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index a9741faa960c..78ccfac0644e 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/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;
 			}
 		}
 
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
index 8431cd0ed9e9..baf191959b13 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
+++ b/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)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
index 90f1418211e9..ee1709cda47e 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h
+++ b/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);
-- 
2.30.1


Download attachment "smime.p7s" of type "application/pkcs7-signature" (4209 bytes)