linux-kernel - [PATCH 5.9 050/252] bnxt_en: Free port stats during firmware reset.

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Message-Id: <20201123121838.004368158@linuxfoundation.org>
Date:   Mon, 23 Nov 2020 13:20:00 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Edwin Peer <edwin.peer@...adcom.com>,
        Vasundhara Volam <vasundhara-v.volam@...adcom.com>,
        Michael Chan <michael.chan@...adcom.com>,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH 5.9 050/252] bnxt_en: Free port stats during firmware reset.

From: Michael Chan <michael.chan@...adcom.com>

[ Upstream commit eba93de6d31c1734dee59909020a162de612e41e ]

Firmware is unable to retain the port counters during any kind of
fatal or non-fatal resets, so we must clear the port counters to
avoid false detection of port counter overflow.

Fixes: fea6b3335527 ("bnxt_en: Accumulate all counters.")
Reviewed-by: Edwin Peer <edwin.peer@...adcom.com>
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@...adcom.com>
Signed-off-by: Michael Chan <michael.chan@...adcom.com>
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -4045,7 +4045,8 @@ static void bnxt_free_mem(struct bnxt *b
 	bnxt_free_ntp_fltrs(bp, irq_re_init);
 	if (irq_re_init) {
 		bnxt_free_ring_stats(bp);
-		if (!(bp->fw_cap & BNXT_FW_CAP_PORT_STATS_NO_RESET))
+		if (!(bp->fw_cap & BNXT_FW_CAP_PORT_STATS_NO_RESET) ||
+		    test_bit(BNXT_STATE_IN_FW_RESET, &bp->state))
 			bnxt_free_port_stats(bp);
 		bnxt_free_ring_grps(bp);
 		bnxt_free_vnics(bp);