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f5919b65d4
Patch generation process: - rebase rpi/rpi-4.14.y on v4.14.89 from linux-stable - git format-patch v4.14.89 Patches skipped during rebase: - lan78xx: Read MAC address from DT if present - lan78xx: Enable LEDs and auto-negotiation - Revert "softirq: Let ksoftirqd do its job" - sc16is7xx: Fix for multi-channel stall - lan78xx: Ignore DT MAC address if already valid - lan78xx: Simple patch to prevent some crashes - tcp_write_queue_purge clears all the SKBs in the write queue - Revert "lan78xx: Simple patch to prevent some crashes" - lan78xx: Connect phy early - Arm: mm: ftrace: Only set text back to ro after kernel has been marked ro - Revert "Revert "softirq: Let ksoftirqd do its job"" - ASoC: cs4265: SOC_SINGLE register value error fix - Revert "ASoC: cs4265: SOC_SINGLE register value error fix" - Revert "net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends" - Revert "Revert "net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends"" Patches dropped after rebase: - net: Add non-mainline source for rtl8192cu wlan - net: Fix rtl8192cu build errors on other platforms - brcm: adds support for BCM43341 wifi - brcmfmac: Mute expected startup 'errors' - ARM64: Fix build break for RTL8187/RTL8192CU wifi - ARM64: Enable RTL8187/RTL8192CU wifi in build config - This is the driver for Sony CXD2880 DVB-T2/T tuner + demodulator - brcmfmac: add CLM download support - brcmfmac: request_firmware_direct is quieter - Sets the BCDC priority to constant 0 - brcmfmac: Disable ARP offloading when promiscuous - brcmfmac: Avoid possible out-of-bounds read - brcmfmac: Delete redundant length check - net: rtl8192cu: Normalize indentation - net: rtl8192cu: Fix implicit fallthrough warnings - Revert "Sets the BCDC priority to constant 0" - media: cxd2880: Bump to match 4.18.y version - media: cxd2880-spi: Bump to match 4.18.y version - Revert "mm: alloc_contig: re-allow CMA to compact FS pages" - Revert "Revert "mm: alloc_contig: re-allow CMA to compact FS pages"" - cxd2880: CXD2880_SPI_DRV should select DVB_CXD2880 with MEDIA_SUBDRV_AUTOSELECT - 950-0421-HID-hid-bigbenff-driver-for-BigBen-Interactive-PS3OF.patch - 950-0453-Add-hid-bigbenff-to-list-of-have_special_driver-for-.patch Make I2C built-in instead of modular as in upstream defconfig; also the easiest way to get MFD_ARIZONA enabled, which is required by kmod-sound-soc-rpi-cirrus. Add missing compatible strings from 4.9/960-add-rasbperrypi-compatible.patch, using upstream names for compute modules. Add extra patch to enable the LEDs on lan78xx. Compile-tested: bcm2708, bcm2709, bcm2710 (with CONFIG_ALL_KMODS=y) Runtime-tested: bcm2708, bcm2710 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
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From: Joshua Emele <jemele@acm.org>
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Date: Wed, 7 Nov 2018 16:07:40 -0800
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Subject: [PATCH 454/454] lan78xx: Debounce link events to minimize poll storm
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The bInterval is set to 4 (i.e. 8 microframes => 1ms) and the only bit
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that the driver pays attention to is "link was reset". If there's a
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flapping status bit in that endpoint data, (such as if PHY negotiation
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needs a few tries to get a stable link) then polling at a slower rate
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would act as a de-bounce.
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See: https://github.com/raspberrypi/linux/issues/2447
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---
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drivers/net/usb/lan78xx.c | 12 +++++++++++-
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1 file changed, 11 insertions(+), 1 deletion(-)
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--- a/drivers/net/usb/lan78xx.c
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+++ b/drivers/net/usb/lan78xx.c
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@@ -425,6 +425,11 @@ static bool enable_tso;
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module_param(enable_tso, bool, 0644);
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MODULE_PARM_DESC(enable_tso, "Enables TCP segmentation offload");
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+#define INT_URB_MICROFRAMES_PER_MS 8
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+static int int_urb_interval_ms = 8;
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+module_param(int_urb_interval_ms, int, 0);
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+MODULE_PARM_DESC(int_urb_interval_ms, "Override usb interrupt urb interval");
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+
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static int lan78xx_read_reg(struct lan78xx_net *dev, u32 index, u32 *data)
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{
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u32 *buf = kmalloc(sizeof(u32), GFP_KERNEL);
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@@ -3707,7 +3712,12 @@ static int lan78xx_probe(struct usb_inte
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dev->pipe_intr = usb_rcvintpipe(dev->udev,
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dev->ep_intr->desc.bEndpointAddress &
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USB_ENDPOINT_NUMBER_MASK);
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- period = dev->ep_intr->desc.bInterval;
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+ if (int_urb_interval_ms <= 0)
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+ period = dev->ep_intr->desc.bInterval;
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+ else
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+ period = int_urb_interval_ms * INT_URB_MICROFRAMES_PER_MS;
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+
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+ netif_notice(dev, probe, netdev, "int urb period %d\n", period);
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maxp = usb_maxpacket(dev->udev, dev->pipe_intr, 0);
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buf = kmalloc(maxp, GFP_KERNEL);
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