Messages in this thread Patch in this message | | | From | Mohammad Athari Bin Ismail <> | Subject | [PATCH net 2/2] net: stmmac: skip only stmmac_ptp_register when resume from suspend | Date | Mon, 24 Jan 2022 17:59:51 +0800 |
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When resume from suspend, besides skipping PTP registration, it also skipping PTP HW initialization. This could cause PTP clock not able to operate properly when resume from suspend.
To fix this, only stmmac_ptp_register() is skipped when resume from suspend.
Fixes: fe1319291150 ("stmmac: Don't init ptp again when resume from suspend/hibernation") Cc: <stable@vger.kernel.org> # 5.15.x Signed-off-by: Mohammad Athari Bin Ismail <mohammad.athari.ismail@intel.com> --- .../net/ethernet/stmicro/stmmac/stmmac_main.c | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index d7e261768f73..cfea38a50a73 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -884,7 +884,7 @@ EXPORT_SYMBOL_GPL(stmmac_init_tstamp_counter); * This is done by looking at the HW cap. register. * This function also registers the ptp driver. */ -static int stmmac_init_ptp(struct stmmac_priv *priv) +static int stmmac_init_ptp(struct stmmac_priv *priv, bool ptp_register) { bool xmac = priv->plat->has_gmac4 || priv->plat->has_xgmac; int ret; @@ -914,7 +914,8 @@ static int stmmac_init_ptp(struct stmmac_priv *priv) priv->hwts_tx_en = 0; priv->hwts_rx_en = 0; - stmmac_ptp_register(priv); + if (ptp_register) + stmmac_ptp_register(priv); return 0; } @@ -3251,7 +3252,7 @@ static int stmmac_fpe_start_wq(struct stmmac_priv *priv) * 0 on success and an appropriate (-)ve integer as defined in errno.h * file on failure. */ -static int stmmac_hw_setup(struct net_device *dev, bool init_ptp) +static int stmmac_hw_setup(struct net_device *dev, bool ptp_register) { struct stmmac_priv *priv = netdev_priv(dev); u32 rx_cnt = priv->plat->rx_queues_to_use; @@ -3308,13 +3309,11 @@ static int stmmac_hw_setup(struct net_device *dev, bool init_ptp) stmmac_mmc_setup(priv); - if (init_ptp) { - ret = stmmac_init_ptp(priv); - if (ret == -EOPNOTSUPP) - netdev_warn(priv->dev, "PTP not supported by HW\n"); - else if (ret) - netdev_warn(priv->dev, "PTP init failed\n"); - } + ret = stmmac_init_ptp(priv, ptp_register); + if (ret == -EOPNOTSUPP) + netdev_warn(priv->dev, "PTP not supported by HW\n"); + else if (ret) + netdev_warn(priv->dev, "PTP init failed\n"); priv->eee_tw_timer = STMMAC_DEFAULT_TWT_LS; -- 2.17.1
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