From 2d5c9dd2cde33150f9dbb8ee091eff05eb6c7df3 Mon Sep 17 00:00:00 2001 From: zhangxiangqian <zhangxiangqian@kylinos.cn> Date: Thu, 8 Aug 2024 17:39:45 +0800 Subject: [PATCH] net: usb: cdc_ether: don't spew notifications The usbnet_link_change function is not called, if the link has not changed. ... [16913.807393][ 3] cdc_ether 1-2:2.0 enx00e0995fd1ac: kevent 12 may have been dropped [16913.822266][ 2] cdc_ether 1-2:2.0 enx00e0995fd1ac: kevent 12 may have been dropped [16913.826296][ 2] cdc_ether 1-2:2.0 enx00e0995fd1ac: kevent 11 may have been dropped ... kevent 11 is scheduled too frequently and may affect other event schedules. Signed-off-by: zhangxiangqian <zhangxiangqian@kylinos.cn> Acked-by: Oliver Neukum <oneukum@suse.com> Link: https://patch.msgid.link/1723109985-11996-1-git-send-email-zhangxiangqian@kylinos.cn Signed-off-by: Jakub Kicinski <kuba@kernel.org> --- drivers/net/usb/cdc_ether.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/usb/cdc_ether.c b/drivers/net/usb/cdc_ether.c index 6d61052353f07..a6469235d904e 100644 --- a/drivers/net/usb/cdc_ether.c +++ b/drivers/net/usb/cdc_ether.c @@ -418,7 +418,8 @@ void usbnet_cdc_status(struct usbnet *dev, struct urb *urb) case USB_CDC_NOTIFY_NETWORK_CONNECTION: netif_dbg(dev, timer, dev->net, "CDC: carrier %s\n", event->wValue ? "on" : "off"); - usbnet_link_change(dev, !!event->wValue, 0); + if (netif_carrier_ok(dev->net) != !!event->wValue) + usbnet_link_change(dev, !!event->wValue, 0); break; case USB_CDC_NOTIFY_SPEED_CHANGE: /* tx/rx rates */ netif_dbg(dev, timer, dev->net, "CDC: speed change (len %d)\n",