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Shawn Shao 98d5873ee0 usb: dwc2: Adjust the timing of USB Driver Interrupt Registration in the Crashkernel Scenario [ Upstream commit `4058c39bd1` ] The issue is that before entering the crash kernel, the DWC USB controller did not perform operations such as resetting the interrupt mask bits. After entering the crash kernel,before the USB interrupt handler registration was completed while loading the DWC USB driver,an GINTSTS_SOF interrupt was received.This triggered the misroute_irq process within the GIC handling framework,ultimately leading to the misrouting of the interrupt,causing it to be handled by the wrong interrupt handler and resulting in the issue. Summary:In a scenario where the kernel triggers a panic and enters the crash kernel,it is necessary to ensure that the interrupt mask bit is not enabled before the interrupt registration is complete. If an interrupt reaches the CPU at this moment,it will certainly not be handled correctly,especially in cases where this interrupt is reported frequently. Please refer to the Crashkernel dmesg information as follows (the message on line 3 was added before devm_request_irq is called by the dwc2_driver_probe function): [ 5.866837][ T1] dwc2 JMIC0010:01: supply vusb_d not found, using dummy regulator [ 5.874588][ T1] dwc2 JMIC0010:01: supply vusb_a not found, using dummy regulator [ 5.882335][ T1] dwc2 JMIC0010:01: before devm_request_irq irq: [71], gintmsk[0xf300080e], gintsts[0x04200009] [ 5.892686][ C0] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.10.0-jmnd1.2_RC #18 [ 5.900327][ C0] Hardware name: CMSS HyperCard4-25G/HyperCard4-25G, BIOS 1.6.4 Jul 8 2024 [ 5.908836][ C0] Call trace: [ 5.911965][ C0] dump_backtrace+0x0/0x1f0 [ 5.916308][ C0] show_stack+0x20/0x30 [ 5.920304][ C0] dump_stack+0xd8/0x140 [ 5.924387][ C0] pcie_xxx_handler+0x3c/0x1d8 [ 5.930121][ C0] __handle_irq_event_percpu+0x64/0x1e0 [ 5.935506][ C0] handle_irq_event+0x80/0x1d0 [ 5.940109][ C0] try_one_irq+0x138/0x174 [ 5.944365][ C0] misrouted_irq+0x134/0x140 [ 5.948795][ C0] note_interrupt+0x1d0/0x30c [ 5.953311][ C0] handle_irq_event+0x13c/0x1d0 [ 5.958001][ C0] handle_fasteoi_irq+0xd4/0x260 [ 5.962779][ C0] __handle_domain_irq+0x88/0xf0 [ 5.967555][ C0] gic_handle_irq+0x9c/0x2f0 [ 5.971985][ C0] el1_irq+0xb8/0x140 [ 5.975807][ C0] __setup_irq+0x3dc/0x7cc [ 5.980064][ C0] request_threaded_irq+0xf4/0x1b4 [ 5.985015][ C0] devm_request_threaded_irq+0x80/0x100 [ 5.990400][ C0] dwc2_driver_probe+0x1b8/0x6b0 [ 5.995178][ C0] platform_drv_probe+0x5c/0xb0 [ 5.999868][ C0] really_probe+0xf8/0x51c [ 6.004125][ C0] driver_probe_device+0xfc/0x170 [ 6.008989][ C0] device_driver_attach+0xc8/0xd0 [ 6.013853][ C0] __driver_attach+0xe8/0x1b0 [ 6.018369][ C0] bus_for_each_dev+0x7c/0xdc [ 6.022886][ C0] driver_attach+0x2c/0x3c [ 6.027143][ C0] bus_add_driver+0xdc/0x240 [ 6.031573][ C0] driver_register+0x80/0x13c [ 6.036090][ C0] __platform_driver_register+0x50/0x5c [ 6.041476][ C0] dwc2_platform_driver_init+0x24/0x30 [ 6.046774][ C0] do_one_initcall+0x50/0x25c [ 6.051291][ C0] do_initcall_level+0xe4/0xfc [ 6.055894][ C0] do_initcalls+0x80/0xa4 [ 6.060064][ C0] kernel_init_freeable+0x198/0x240 [ 6.065102][ C0] kernel_init+0x1c/0x12c Signed-off-by: Shawn Shao <shawn.shao@jaguarmicro.com> Link: https://lore.kernel.org/r/20240830031709.134-1-shawn.shao@jaguarmicro.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2024-10-17 15:11:52 +02:00
arch	s390/cpum_sf: Remove WARN_ON_ONCE statements	2024-10-17 15:11:50 +02:00
block	blk-integrity: register sysfs attributes on struct device	2024-10-17 15:11:33 +02:00
certs	certs/blacklist_hashes.c: fix const confusion in certs blacklist	2022-06-22 14:22:01 +02:00
crypto	crypto: xor - fix template benchmarking	2024-10-17 15:10:42 +02:00
Documentation	arm64: errata: Expand speculative SSBS workaround once more	2024-10-17 15:11:45 +02:00
drivers	usb: dwc2: Adjust the timing of USB Driver Interrupt Registration in the Crashkernel Scenario	2024-10-17 15:11:52 +02:00
fs	ext4: nested locking for xattr inode	2024-10-17 15:11:50 +02:00
include	PCI: Add function 0 DMA alias quirk for Glenfly Arise chip	2024-10-17 15:11:50 +02:00
init	init/main.c: Fix potential static_command_line memory overflow	2024-04-27 17:05:28 +02:00
io_uring	io_uring/io-wq: limit retrying worker initialisation	2024-08-19 05:45:22 +02:00
ipc	ipc/sem: Fix dangling sem_array access in semtimedop race	2022-12-08 11:28:45 +01:00
kernel	bpf: Check percpu map value size first	2024-10-17 15:11:49 +02:00
lib	lib/buildid: harden build ID parsing logic	2024-10-17 15:11:45 +02:00
LICENSES	LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes"	2021-07-15 06:31:24 -06:00
mm	mm: only enforce minimum stack gap size if it's sensible	2024-10-17 15:11:18 +02:00
net	tcp: avoid reusing FIN_WAIT2 when trying to find port in connect() process	2024-10-17 15:11:26 +02:00
samples	Add gitignore file for samples/fanotify/ subdirectory	2024-07-27 10:46:16 +02:00
scripts	kconfig: qconf: fix buffer overflow in debug links	2024-10-17 15:11:43 +02:00
security	tomoyo: fallback to realpath if symlink's pathname does not exist	2024-10-17 15:11:41 +02:00
sound	PCI: Add function 0 DMA alias quirk for Glenfly Arise chip	2024-10-17 15:11:50 +02:00
tools	ktest.pl: Avoid false positives with grub2 skip regex	2024-10-17 15:11:50 +02:00
usr	usr/include/Makefile: add linux/nfc.h to the compile-test coverage	2022-02-01 17:27:15 +01:00
virt	KVM: Always flush async #PF workqueue when vCPU is being destroyed	2024-04-10 16:18:34 +02:00
.clang-format	clang-format: Update with the latest for_each macro list	2021-05-12 23:32:39 +02:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.get_maintainer.ignore	Opt out of scripts/get_maintainer.pl	2019-05-16 10:53:40 -07:00
.gitattributes	.gitattributes: use 'dts' diff driver for dts files	2019-12-04 19:44:11 -08:00
.gitignore	Remove *.orig pattern from .gitignore	2024-10-17 15:11:10 +02:00
.mailmap	mailmap: add Andrej Shadura	2021-10-18 20:22:03 -10:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: Move Daniel Drake to credits	2021-09-21 08:34:58 +03:00
Kbuild	kbuild: rename hostprogs-y/always to hostprogs/always-y	2020-02-04 01:53:07 +09:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	trace: Relocate event helper files	2024-04-10 16:19:24 +02:00
Makefile	Linux 5.15.167	2024-09-12 11:07:53 +02:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -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.

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.