diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0132-lan78xx-Debounce-link-events-to-minimize-poll-storm.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0132-lan78xx-Debounce-link-events-to-minimize-poll-storm.patch | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0132-lan78xx-Debounce-link-events-to-minimize-poll-storm.patch b/target/linux/bcm27xx/patches-5.4/950-0132-lan78xx-Debounce-link-events-to-minimize-poll-storm.patch deleted file mode 100644 index 19ea77e99c..0000000000 --- a/target/linux/bcm27xx/patches-5.4/950-0132-lan78xx-Debounce-link-events-to-minimize-poll-storm.patch +++ /dev/null @@ -1,43 +0,0 @@ -From 20c9da8c7bab3bbc18e42ee0b2659c4b43aabad7 Mon Sep 17 00:00:00 2001 -From: Joshua Emele <jemele@acm.org> -Date: Wed, 7 Nov 2018 16:07:40 -0800 -Subject: [PATCH] lan78xx: Debounce link events to minimize poll storm - -The bInterval is set to 4 (i.e. 8 microframes => 1ms) and the only bit -that the driver pays attention to is "link was reset". If there's a -flapping status bit in that endpoint data, (such as if PHY negotiation -needs a few tries to get a stable link) then polling at a slower rate -would act as a de-bounce. - -See: https://github.com/raspberrypi/linux/issues/2447 ---- - drivers/net/usb/lan78xx.c | 12 +++++++++++- - 1 file changed, 11 insertions(+), 1 deletion(-) ---- a/drivers/net/usb/lan78xx.c -+++ b/drivers/net/usb/lan78xx.c -@@ -434,6 +434,11 @@ static bool enable_tso; - module_param(enable_tso, bool, 0644); - MODULE_PARM_DESC(enable_tso, "Enables TCP segmentation offload"); - -+#define INT_URB_MICROFRAMES_PER_MS 8 -+static int int_urb_interval_ms = 8; -+module_param(int_urb_interval_ms, int, 0); -+MODULE_PARM_DESC(int_urb_interval_ms, "Override usb interrupt urb interval"); -+ - static int lan78xx_read_reg(struct lan78xx_net *dev, u32 index, u32 *data) - { - u32 *buf = kmalloc(sizeof(u32), GFP_KERNEL); -@@ -3776,7 +3781,12 @@ static int lan78xx_probe(struct usb_inte - netdev->max_mtu = MAX_SINGLE_PACKET_SIZE; - netif_set_gso_max_size(netdev, MAX_SINGLE_PACKET_SIZE - MAX_HEADER); - -- period = ep_intr->desc.bInterval; -+ if (int_urb_interval_ms <= 0) -+ period = ep_intr->desc.bInterval; -+ else -+ period = int_urb_interval_ms * INT_URB_MICROFRAMES_PER_MS; -+ -+ netif_notice(dev, probe, netdev, "int urb period %d\n", period); - maxp = usb_maxpacket(dev->udev, dev->pipe_intr, 0); - buf = kmalloc(maxp, GFP_KERNEL); - if (buf) { |