Go to file
Jacob Keller e5f36ad14c igb: check for Tx timestamp timeouts during watchdog
The igb driver has logic to handle only one Tx timestamp at a time,
using a state bit lock to avoid multiple requests at once.

It may be possible, if incredibly unlikely, that a Tx timestamp event is
requested but never completes. Since we use an interrupt scheme to
determine when the Tx timestamp occurred we would never clear the state
bit in this case.

Add an igb_ptp_tx_hang() function similar to the already existing
igb_ptp_rx_hang() function. This function runs in the watchdog routine
and makes sure we eventually recover from this case instead of
permanently disabling Tx timestamps.

Note: there is no currently known way to cause this without hacking the
driver code to force it.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
2017-06-06 01:03:17 -07:00
arch arm64: defconfig: Enable dwmac-sun8i driver on defconfig 2017-06-01 14:53:09 -04:00
block Merge branch 'nvme-4.12' of git://git.infradead.org/nvme into for-linus 2017-05-26 09:11:19 -06:00
certs
crypto
Documentation i40evf: update i40evf.txt with new content 2017-06-01 14:31:37 -07:00
drivers igb: check for Tx timestamp timeouts during watchdog 2017-06-06 01:03:17 -07:00
firmware
fs Changed since last update: 2017-05-26 12:13:08 -07:00
include net/{mii, smsc}: Make mii_ethtool_get_link_ksettings and smc_netdev_get_ecmd return void 2017-06-05 11:00:42 -04:00
init
ipc
kernel perf, bpf: Add BPF support to all perf_event types 2017-06-04 21:58:01 -04:00
lib bpf: fix stack_depth usage by test_bpf.ko 2017-05-31 19:29:48 -04:00
mm
net net: sched: select cls when cls_act is enabled 2017-06-05 10:56:36 -04:00
samples samples/bpf: add tests for more perf event types 2017-06-04 21:58:15 -04:00
scripts
security
sound sound fixes for 4.12-rc3 2017-05-26 09:03:09 -07:00
tools bpf: update perf event helper functions documentation 2017-06-04 21:58:16 -04:00
usr
virt
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS i40e/i40evf: create and use new unified header file 2017-06-01 14:04:42 -07:00
Makefile Linux 4.12-rc2 2017-05-21 19:30:23 -07:00
README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.