netdev - [PATCH net 2/3] bnxt_en: Initiallize bp->ptp

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Message-Id: <1651540392-2260-3-git-send-email-michael.chan@broadcom.com>
Date:   Mon,  2 May 2022 21:13:11 -0400
From:   Michael Chan <michael.chan@...adcom.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, kuba@...nel.org, gospo@...adcom.com
Subject: [PATCH net 2/3] bnxt_en: Initiallize bp->ptp_lock first before using it

bnxt_ptp_init() calls bnxt_ptp_init_rtc() which will acquire the ptp_lock
spinlock.  The spinlock is not initialized until later.  Move the
bnxt_ptp_init_rtc() call after the spinlock is initialized.

Fixes: 24ac1ecd5240 ("bnxt_en: Add driver support to use Real Time Counter for PTP")
Reviewed-by: Pavan Chebbi <pavan.chebbi@...adcom.com>
Reviewed-by: Saravanan Vajravel <saravanan.vajravel@...adcom.com>
Reviewed-by: Andy Gospodarek <andrew.gospodarek@...adcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@...adcom.com>
Reviewed-by: Damodharam Ammepalli <damodharam.ammepalli@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
index 9c2ad5e67a5d..00f2f80c0073 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c
@@ -846,13 +846,6 @@ int bnxt_ptp_init(struct bnxt *bp, bool phc_cfg)
 	if (rc)
 		return rc;
 
-	if (bp->fw_cap & BNXT_FW_CAP_PTP_RTC) {
-		bnxt_ptp_timecounter_init(bp, false);
-		rc = bnxt_ptp_init_rtc(bp, phc_cfg);
-		if (rc)
-			goto out;
-	}
-
 	if (ptp->ptp_clock && bnxt_pps_config_ok(bp))
 		return 0;
 
@@ -861,8 +854,14 @@ int bnxt_ptp_init(struct bnxt *bp, bool phc_cfg)
 	atomic_set(&ptp->tx_avail, BNXT_MAX_TX_TS);
 	spin_lock_init(&ptp->ptp_lock);
 
-	if (!(bp->fw_cap & BNXT_FW_CAP_PTP_RTC))
+	if (bp->fw_cap & BNXT_FW_CAP_PTP_RTC) {
+		bnxt_ptp_timecounter_init(bp, false);
+		rc = bnxt_ptp_init_rtc(bp, phc_cfg);
+		if (rc)
+			goto out;
+	} else {
 		bnxt_ptp_timecounter_init(bp, true);
+	}
 
 	ptp->ptp_info = bnxt_ptp_caps;
 	if ((bp->fw_cap & BNXT_FW_CAP_PTP_PPS)) {
-- 
2.18.1


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