From 5fa80a326d9dbd79d83148768c618e2da69e98e0 Mon Sep 17 00:00:00 2001 From: Chun-Hao Lin Date: Fri, 29 Jul 2016 16:37:54 +0800 Subject: r8169: fix kernel log spam when set or get hardware wol setting. NIC will be put into D3 state during runtime suspend state. When set or get hardware wol setting, driver will write or read hardware registers. If we set or get hardware wol setting in runtime suspend state, because NIC will in D3 state, the hardware registers read by driver will return all 0xff. That will let driver thinking register flag is not toggled and then prints the warning message "rtl_counters_cond == 1 (loop: 1000, delay: 10)" to kernel log. For fixing this issue, add checking driver's pm runtime status in rtl8169_get_wol() and rtl8169_set_wol(). Signed-off-by: Chunhao Lin Signed-off-by: David S. Miller --- drivers/net/ethernet/realtek/r8169.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) (limited to 'drivers/net/ethernet') diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c index 0e62d74b09b3..00c387bf41b7 100644 --- a/drivers/net/ethernet/realtek/r8169.c +++ b/drivers/net/ethernet/realtek/r8169.c @@ -1749,13 +1749,21 @@ static u32 __rtl8169_get_wol(struct rtl8169_private *tp) static void rtl8169_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol) { struct rtl8169_private *tp = netdev_priv(dev); + struct device *d = &tp->pci_dev->dev; + + pm_runtime_get_noresume(d); rtl_lock_work(tp); wol->supported = WAKE_ANY; - wol->wolopts = __rtl8169_get_wol(tp); + if (pm_runtime_active(d)) + wol->wolopts = __rtl8169_get_wol(tp); + else + wol->wolopts = tp->saved_wolopts; rtl_unlock_work(tp); + + pm_runtime_put_noidle(d); } static void __rtl8169_set_wol(struct rtl8169_private *tp, u32 wolopts) @@ -1845,6 +1853,9 @@ static void __rtl8169_set_wol(struct rtl8169_private *tp, u32 wolopts) static int rtl8169_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) { struct rtl8169_private *tp = netdev_priv(dev); + struct device *d = &tp->pci_dev->dev; + + pm_runtime_get_noresume(d); rtl_lock_work(tp); @@ -1852,12 +1863,17 @@ static int rtl8169_set_wol(struct net_device *dev, struct ethtool_wolinfo *wol) tp->features |= RTL_FEATURE_WOL; else tp->features &= ~RTL_FEATURE_WOL; - __rtl8169_set_wol(tp, wol->wolopts); + if (pm_runtime_active(d)) + __rtl8169_set_wol(tp, wol->wolopts); + else + tp->saved_wolopts = wol->wolopts; rtl_unlock_work(tp); device_set_wakeup_enable(&tp->pci_dev->dev, wol->wolopts); + pm_runtime_put_noidle(d); + return 0; } -- cgit v1.2.3-59-g8ed1b From e06362369ae1e5b0ba70b66f8703ff08bcb63b23 Mon Sep 17 00:00:00 2001 From: Chun-Hao Lin Date: Fri, 29 Jul 2016 16:37:55 +0800 Subject: r8169: add checking driver's runtime pm status in rtl8169_get_ethtool_stats() Not to call rtl8169_update_counters() to dump tally counter when driver is in runtime suspend state. Calling rtl8169_update_counters() in runtime suspend state will produce warning message "rtl_counters_cond == 1 (loop: 1000, delay: 10)". Signed-off-by: Chunhao Lin Signed-off-by: David S. Miller --- drivers/net/ethernet/realtek/r8169.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'drivers/net/ethernet') diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c index 00c387bf41b7..d0b5cae2825f 100644 --- a/drivers/net/ethernet/realtek/r8169.c +++ b/drivers/net/ethernet/realtek/r8169.c @@ -2308,11 +2308,17 @@ static void rtl8169_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data) { struct rtl8169_private *tp = netdev_priv(dev); + struct device *d = &tp->pci_dev->dev; struct rtl8169_counters *counters = tp->counters; ASSERT_RTNL(); - rtl8169_update_counters(dev); + pm_runtime_get_noresume(d); + + if (pm_runtime_active(d)) + rtl8169_update_counters(dev); + + pm_runtime_put_noidle(d); data[0] = le64_to_cpu(counters->tx_packets); data[1] = le64_to_cpu(counters->rx_packets); -- cgit v1.2.3-59-g8ed1b From f51d4a10ac39ecf06b25e7a79121b06f7ed59928 Mon Sep 17 00:00:00 2001 From: Chun-Hao Lin Date: Fri, 29 Jul 2016 16:37:56 +0800 Subject: r8169: fix nic may not work after changing mac address. When there is no AC power, NIC may not work after changing mac address. Please refer to following link. http://www.spinics.net/lists/netdev/msg356572.html This issue is caused by runtime power management. When there is no AC power, if we put NIC down (ifconfig down), the driver will be in runtime suspend state and hardware will be put into D3 state. During this time, driver cannot access hardware regisers. So if you set new mac address during this time, it will not be set to hardware. After resume, NIC will keep using the old mac address and the network will not work normally. In this patch I add detecting runtime pm status when setting mac address. If driver is in runtime suspend state, it will skip setting mac address, keep the new mac address, and set the new mac address during runtime resume. Signed-off-by: Chunhao Lin Signed-off-by: David S. Miller --- drivers/net/ethernet/realtek/r8169.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'drivers/net/ethernet') diff --git a/drivers/net/ethernet/realtek/r8169.c b/drivers/net/ethernet/realtek/r8169.c index d0b5cae2825f..e55638c7505a 100644 --- a/drivers/net/ethernet/realtek/r8169.c +++ b/drivers/net/ethernet/realtek/r8169.c @@ -4480,6 +4480,7 @@ static void rtl_rar_set(struct rtl8169_private *tp, u8 *addr) static int rtl_set_mac_address(struct net_device *dev, void *p) { struct rtl8169_private *tp = netdev_priv(dev); + struct device *d = &tp->pci_dev->dev; struct sockaddr *addr = p; if (!is_valid_ether_addr(addr->sa_data)) @@ -4487,7 +4488,12 @@ static int rtl_set_mac_address(struct net_device *dev, void *p) memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); - rtl_rar_set(tp, dev->dev_addr); + pm_runtime_get_noresume(d); + + if (pm_runtime_active(d)) + rtl_rar_set(tp, dev->dev_addr); + + pm_runtime_put_noidle(d); return 0; } @@ -7890,6 +7896,7 @@ static int rtl8169_runtime_resume(struct device *device) struct pci_dev *pdev = to_pci_dev(device); struct net_device *dev = pci_get_drvdata(pdev); struct rtl8169_private *tp = netdev_priv(dev); + rtl_rar_set(tp, dev->dev_addr); if (!tp->TxDescArray) return 0; -- cgit v1.2.3-59-g8ed1b