diff mbox series

[net-next,08/10] bnxt_en: Let bnxt_stamp_tx_skb() return error code

Message ID 20240626164307.219568-9-michael.chan@broadcom.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series bnxt_en: PTP updates for net-next | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 842 this patch: 842
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 849 this patch: 849
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 849 this patch: 849
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 50 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2024-06-27--03-00 (tests: 665)

Commit Message

Michael Chan June 26, 2024, 4:43 p.m. UTC 
From: Pavan Chebbi <pavan.chebbi@broadcom.com>

Change the function bnxt_stamp_tx_skb() to return 0 for suceess
or -EAGAIN if the timestamp is still pending in firmware.  The
calling PTP aux worker will reschedule based on the return code.

Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
index baf191959b13..bd1e270307ec 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
@@ -683,7 +683,7 @@  static u64 bnxt_cc_read(const struct cyclecounter *cc)
 	return ns;
 }
 
-static void bnxt_stamp_tx_skb(struct bnxt *bp, struct sk_buff *skb)
+static int bnxt_stamp_tx_skb(struct bnxt *bp, struct sk_buff *skb)
 {
 	struct bnxt_ptp_cfg *ptp = bp->ptp_cfg;
 	struct skb_shared_hwtstamps timestamp;
@@ -711,7 +711,7 @@  static void bnxt_stamp_tx_skb(struct bnxt *bp, struct sk_buff *skb)
 	} else {
 		if (!time_after_eq(jiffies, txts_req->abs_txts_tmo)) {
 			txts_req->txts_pending = true;
-			return;
+			return -EAGAIN;
 		}
 		ptp->stats.ts_lost++;
 		netdev_warn_once(bp->dev,
@@ -722,6 +722,8 @@  static void bnxt_stamp_tx_skb(struct bnxt *bp, struct sk_buff *skb)
 	txts_req->tx_skb = NULL;
 	atomic_inc(&ptp->tx_avail);
 	txts_req->txts_pending = false;
+
+	return 0;
 }
 
 static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info)
@@ -730,12 +732,16 @@  static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info)
 						ptp_info);
 	unsigned long now = jiffies;
 	struct bnxt *bp = ptp->bp;
+	int rc = 0;
 
 	if (ptp->txts_req.tx_skb)
-		bnxt_stamp_tx_skb(bp, ptp->txts_req.tx_skb);
+		rc = bnxt_stamp_tx_skb(bp, ptp->txts_req.tx_skb);
 
-	if (!time_after_eq(now, ptp->next_period))
+	if (!time_after_eq(now, ptp->next_period)) {
+		if (rc == -EAGAIN)
+			return 0;
 		return ptp->next_period - now;
+	}
 
 	bnxt_ptp_get_current_time(bp);
 	ptp->next_period = now + HZ;
@@ -745,7 +751,7 @@  static long bnxt_ptp_ts_aux_work(struct ptp_clock_info *ptp_info)
 		spin_unlock_bh(&ptp->ptp_lock);
 		ptp->next_overflow_check = now + BNXT_PHC_OVERFLOW_PERIOD;
 	}
-	if (ptp->txts_req.txts_pending)
+	if (rc == -EAGAIN)
 		return 0;
 	return HZ;
 }