bnxt_en: Reset PTP tx_avail after possible firmware reset

It is possible that during error recovery and firmware reset,
there is a pending TX PTP packet waiting for the timestamp.
We need to reset this condition so that after recovery, the
tx_avail count for PTP is reset back to the initial value.
Otherwise, we may not accept any PTP TX timestamps after
recovery.

Fixes: 118612d519d8 ("bnxt_en: Add PTP clock APIs, ioctls, and ethtool methods")
Reviewed-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
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>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 493b724848c8f44122abd1b1fb340e97abc30a09..57e61f9631678edf31a2ff237fe0301254a396e5 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -11758,6 +11758,8 @@ static int __bnxt_open_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init)
        /* VF-reps may need to be re-opened after the PF is re-opened */
        if (BNXT_PF(bp))
                bnxt_vf_reps_open(bp);
+       if (bp->ptp_cfg)
+               atomic_set(&bp->ptp_cfg->tx_avail, BNXT_MAX_TX_TS);
        bnxt_ptp_init_rtc(bp, true);
        bnxt_ptp_cfg_tstamp_filters(bp);
        bnxt_cfg_usr_fltrs(bp);