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Jiangfeng Xiao 3b956e63e2 net: hisilicon: Fix "Trying to free already-free IRQ" [ Upstream commit `63a4174682` ] When rmmod hip04_eth.ko, we can get the following warning: Task track: rmmod(1623)>bash(1591)>login(1581)>init(1) ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1623 at kernel/irq/manage.c:1557 __free_irq+0xa4/0x2ac() Trying to free already-free IRQ 200 Modules linked in: ping(O) pramdisk(O) cpuinfo(O) rtos_snapshot(O) interrupt_ctrl(O) mtdblock mtd_blkdevrtfs nfs_acl nfs lockd grace sunrpc xt_tcpudp ipt_REJECT iptable_filter ip_tables x_tables nf_reject_ipv CPU: 0 PID: 1623 Comm: rmmod Tainted: G O 4.4.193 #1 Hardware name: Hisilicon A15 [<c020b408>] (rtos_unwind_backtrace) from [<c0206624>] (show_stack+0x10/0x14) [<c0206624>] (show_stack) from [<c03f2be4>] (dump_stack+0xa0/0xd8) [<c03f2be4>] (dump_stack) from [<c021a780>] (warn_slowpath_common+0x84/0xb0) [<c021a780>] (warn_slowpath_common) from [<c021a7e8>] (warn_slowpath_fmt+0x3c/0x68) [<c021a7e8>] (warn_slowpath_fmt) from [<c026876c>] (__free_irq+0xa4/0x2ac) [<c026876c>] (__free_irq) from [<c0268a14>] (free_irq+0x60/0x7c) [<c0268a14>] (free_irq) from [<c0469e80>] (release_nodes+0x1c4/0x1ec) [<c0469e80>] (release_nodes) from [<c0466924>] (__device_release_driver+0xa8/0x104) [<c0466924>] (__device_release_driver) from [<c0466a80>] (driver_detach+0xd0/0xf8) [<c0466a80>] (driver_detach) from [<c0465e18>] (bus_remove_driver+0x64/0x8c) [<c0465e18>] (bus_remove_driver) from [<c02935b0>] (SyS_delete_module+0x198/0x1e0) [<c02935b0>] (SyS_delete_module) from [<c0202ed0>] (__sys_trace_return+0x0/0x10) ---[ end trace bb25d6123d849b44 ]--- Currently "rmmod hip04_eth.ko" call free_irq more than once as devres_release_all and hip04_remove both call free_irq. This results in a 'Trying to free already-free IRQ' warning. To solve the problem free_irq has been moved out of hip04_remove. Signed-off-by: Jiangfeng Xiao <xiaojiangfeng@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-11-12 19:21:12 +01:00
arch	perf/x86/uncore: Fix event group support	2019-11-12 19:21:07 +01:00
block	blk-rq-qos: fix first node deletion of rq_qos_del()	2019-10-29 09:20:09 +01:00
certs	export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR()	2018-08-22 23:21:44 +09:00
crypto	crypto: skcipher - Unmap pages after an external error	2019-10-11 18:20:52 +02:00
Documentation	sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices	2019-11-12 19:20:50 +01:00
drivers	net: hisilicon: Fix "Trying to free already-free IRQ"	2019-11-12 19:21:12 +01:00
firmware	kbuild: remove all dummy assignments to obj-	2017-11-18 11:46:06 +09:00
fs	configfs: fix a deadlock in configfs_symlink()	2019-11-12 19:20:47 +01:00
include	ipvs: move old_secure_tcp into struct netns_ipvs	2019-11-12 19:21:01 +01:00
init	initramfs: don't free a non-existent initrd	2019-10-01 08:26:09 +02:00
ipc	ipc/mqueue.c: only perform resource calculation if user valid	2019-08-06 19:06:52 +02:00
kernel	sched/fair: Fix -Wunused-but-set-variable warnings	2019-11-12 19:20:51 +01:00
lib	dump_stack: avoid the livelock of the dump_lock	2019-11-12 19:20:37 +01:00
LICENSES	LICENSES: Remove CC-BY-SA-4.0 license text	2018-10-18 11:28:50 +02:00
mm	mm, vmstat: hide /proc/pagetypeinfo from normal users	2019-11-12 19:20:36 +01:00
net	ipvs: move old_secure_tcp into struct netns_ipvs	2019-11-12 19:21:01 +01:00
samples	samples: bpf: fix: seg fault with NULL pointer arg	2019-11-06 13:05:30 +01:00
scripts	scripts/setlocalversion: Improve -dirty check with git-status --no-optional-locks	2019-11-06 13:05:27 +01:00
security	ima: fix freeing ongoing ahash_request	2019-10-11 18:21:11 +02:00
sound	ALSA: usb-audio: Fix copy&paste error in the validator	2019-11-12 19:20:50 +01:00
tools	usbip: tools: Fix read_usb_vudc_device() error path handling	2019-11-12 19:21:09 +01:00
usr	kbuild: clean compressed initramfs image	2019-10-07 18:57:16 +02:00
virt	KVM: coalesced_mmio: add bounds checking	2019-09-21 07:16:44 +02:00
.clang-format	clang-format: Set IndentWrappedFunctionNames false	2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes	.gitattributes: set git diff driver for C source code files	2016-10-07 18:46:30 -07:00
.gitignore	Kbuild updates for v4.17 (2nd)	2018-04-15 17:21:30 -07:00
.mailmap	libnvdimm-for-4.19_misc	2018-08-25 18:13:10 -07:00
COPYING	COPYING: use the new text with points to the license files	2018-03-23 12:41:45 -06:00
CREDITS	9p: remove Ron Minnich from MAINTAINERS	2018-08-17 16:20:26 -07:00
Kbuild	Kbuild updates for v4.15	2017-11-17 17:45:29 -08:00
Kconfig	kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt	2018-08-02 08:06:55 +09:00
MAINTAINERS	USB: rio500: Remove Rio 500 kernel driver	2019-10-17 13:44:47 -07:00
Makefile	Linux 4.19.83	2019-11-10 11:27:57 +01:00
README	Docs: Added a pointer to the formatted docs to README	2018-03-21 09:02:53 -06:00

README

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

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

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.