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That looks problematic to me, because reset_resume() should redo the operation. What do you think? Regards Oliver From 19fc972a5cc98197bc81a7c56dd5d68e3fdfc36b Mon Sep 17 00:00:00 2001 From: Oliver Neukum Date: Wed, 27 Jul 2022 13:29:42 +0200 Subject: [PATCH] r8152: restore external MAC in reset_resume If user space has set the MAC of the interface, reset_resume() must restore that setting rather than redetermine the MAC like if te interface is probed regularly. Signed-off-by: Oliver Neukum --- drivers/net/usb/r8152.c | 34 +++++++++++++++++++++++++--------- 1 file changed, 25 insertions(+), 9 deletions(-) diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c index 0f6efaabaa32..5cf74b984655 100644 --- a/drivers/net/usb/r8152.c +++ b/drivers/net/usb/r8152.c @@ -923,6 +923,7 @@ struct r8152 { atomic_t rx_count; bool eee_en; + bool external_mac; int intr_interval; u32 saved_wolopts; u32 msg_enable; @@ -933,6 +934,8 @@ struct r8152 { u32 rx_copybreak; u32 rx_pending; u32 fc_pause_on, fc_pause_off; + /* for reset_resume */ + struct sockaddr saved_addr; unsigned int pipe_in, pipe_out, pipe_intr, pipe_ctrl_in, pipe_ctrl_out; @@ -1574,6 +1577,7 @@ static int __rtl8152_set_mac_address(struct net_device *netdev, void *p, mutex_lock(&tp->control); eth_hw_addr_set(netdev, addr->sa_data); + memcpy(&tp->saved_addr, addr, sizeof(tp->saved_addr)); ocp_write_byte(tp, MCU_TYPE_PLA, PLA_CRWECR, CRWECR_CONFIG); pla_ocp_write(tp, PLA_IDR, BYTE_EN_SIX_BYTES, 8, addr->sa_data); @@ -1589,7 +1593,13 @@ static int __rtl8152_set_mac_address(struct net_device *netdev, void *p, static int rtl8152_set_mac_address(struct net_device *netdev, void *p) { - return __rtl8152_set_mac_address(netdev, p, false); + int rv; + struct r8152 *tp = netdev_priv(netdev); + + rv = __rtl8152_set_mac_address(netdev, p, false); + if (!rv) + tp->external_mac = true; + return rv; } /* Devices containing proper chips can support a persistent @@ -1676,10 +1686,14 @@ static int vendor_mac_passthru_addr_read(struct r8152 *tp, struct sockaddr *sa) static int determine_ethernet_addr(struct r8152 *tp, struct sockaddr *sa) { struct net_device *dev = tp->netdev; - int ret; + int ret = 0; sa->sa_family = dev->type; + if (tp->external_mac) { + ether_addr_copy(sa->sa_data, dev->dev_addr); + return ret; + } ret = eth_platform_get_mac_address(&tp->udev->dev, sa->sa_data); if (ret < 0) { if (tp->version == RTL_VER_01) { @@ -1713,17 +1727,18 @@ static int determine_ethernet_addr(struct r8152 *tp, struct sockaddr *sa) static int set_ethernet_addr(struct r8152 *tp, bool in_resume) { struct net_device *dev = tp->netdev; - struct sockaddr sa; - int ret; + int ret = 0; - ret = determine_ethernet_addr(tp, &sa); - if (ret < 0) - return ret; + if (!tp->external_mac) { + ret = determine_ethernet_addr(tp, &tp->saved_addr); + if (ret < 0) + return ret; + } if (tp->version == RTL_VER_01) - eth_hw_addr_set(dev, sa.sa_data); + eth_hw_addr_set(dev, tp->saved_addr.sa_data); else - ret = __rtl8152_set_mac_address(dev, &sa, in_resume); + ret = __rtl8152_set_mac_address(dev, &tp->saved_addr, in_resume); return ret; } @@ -6225,6 +6240,7 @@ static void rtl8152_down(struct r8152 *tp) r8152_aldps_en(tp, false); r8152b_enter_oob(tp); r8152_aldps_en(tp, true); + tp->external_mac = false; } static void rtl8153_up(struct r8152 *tp) -- 2.35.3