8c6f00ef4f
Refresh patches.
Remove upstreamed patches:
- backport/096-mips-math-emu-Write-protect-delay-slot-emulation-pages.patch
- pending/510-f2fs-fix-sanity_check_raw_super-on-big-endian-machines.patch
- brcm2708/950-0415-qmi_wwan-apply-SET_DTR-quirk-to-the-SIMCOM-shared-de.patch
Compile-tested: ar71xx, ath79, brcm2708/bcm27{08,10}, octeon, x86/64
Runtime-tested: ar71xx, ath79, brcm2708/bcm27{08,10}, octeon, x86/64
Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
45 lines
1.7 KiB
Diff
45 lines
1.7 KiB
Diff
From 44c28420145101c846b445b8ae6159400909f69f Mon Sep 17 00:00:00 2001
|
|
From: Joshua Emele <jemele@acm.org>
|
|
Date: Wed, 7 Nov 2018 16:07:40 -0800
|
|
Subject: [PATCH 454/454] 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
|
|
@@ -425,6 +425,11 @@ 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);
|
|
@@ -3711,7 +3716,12 @@ static int lan78xx_probe(struct usb_inte
|
|
dev->pipe_intr = usb_rcvintpipe(dev->udev,
|
|
dev->ep_intr->desc.bEndpointAddress &
|
|
USB_ENDPOINT_NUMBER_MASK);
|
|
- period = dev->ep_intr->desc.bInterval;
|
|
+ if (int_urb_interval_ms <= 0)
|
|
+ period = dev->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);
|