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Sean Wang e230f0c44f mt76: mt7921: fix kernel crash when the firmware fails to download Fix kernel crash when the firmware is missing or fails to download. [ 9.444758] kernel BUG at drivers/pci/msi.c:375! [ 9.449363] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP [ 9.501033] pstate: a0400009 (NzCv daif +PAN -UAO) [ 9.505814] pc : free_msi_irqs+0x180/0x184 [ 9.509897] lr : free_msi_irqs+0x40/0x184 [ 9.513893] sp : ffffffc015193870 [ 9.517194] x29: ffffffc015193870 x28: 00000000f0e94fa2 [ 9.522492] x27: 0000000000000acd x26: 000000000000009a [ 9.527790] x25: ffffffc0152cee58 x24: ffffffdbb383e0d8 [ 9.533087] x23: ffffffdbb38628d0 x22: 0000000000040200 [ 9.538384] x21: ffffff8cf7de7318 x20: ffffff8cd65a2480 [ 9.543681] x19: ffffff8cf7de7000 x18: 0000000000000000 [ 9.548979] x17: ffffff8cf9ca03b4 x16: ffffffdc13ad9a34 [ 9.554277] x15: 0000000000000000 x14: 0000000000080800 [ 9.559575] x13: ffffff8cd65a2980 x12: 0000000000000000 [ 9.564873] x11: ffffff8cfa45d820 x10: ffffff8cfa45d6d0 [ 9.570171] x9 : 0000000000000040 x8 : ffffff8ccef1b780 [ 9.575469] x7 : aaaaaaaaaaaaaaaa x6 : 0000000000000000 [ 9.580766] x5 : ffffffdc13824900 x4 : ffffff8ccefe0000 [ 9.586063] x3 : 0000000000000000 x2 : 0000000000000000 [ 9.591362] x1 : 0000000000000125 x0 : ffffff8ccefe0000 [ 9.596660] Call trace: [ 9.599095] free_msi_irqs+0x180/0x184 [ 9.602831] pci_disable_msi+0x100/0x130 [ 9.606740] pci_free_irq_vectors+0x24/0x30 [ 9.610915] mt7921_pci_probe+0xbc/0x250 [mt7921e] [ 9.615693] pci_device_probe+0xd4/0x14c [ 9.619604] really_probe+0x134/0x2ec [ 9.623252] driver_probe_device+0x64/0xfc [ 9.627335] device_driver_attach+0x4c/0x6c [ 9.631506] __driver_attach+0xac/0xc0 [ 9.635243] bus_for_each_dev+0x8c/0xd4 [ 9.639066] driver_attach+0x2c/0x38 [ 9.642628] bus_add_driver+0xfc/0x1d0 [ 9.646365] driver_register+0x64/0xf8 [ 9.650101] __pci_register_driver+0x6c/0x7c [ 9.654360] init_module+0x28/0xfdc [mt7921e] [ 9.658704] do_one_initcall+0x13c/0x2d0 [ 9.662615] do_init_module+0x58/0x1e8 [ 9.666351] load_module+0xd80/0xeb4 [ 9.669912] __arm64_sys_finit_module+0xa8/0xe0 [ 9.674430] el0_svc_common+0xa4/0x16c [ 9.678168] el0_svc_compat_handler+0x2c/0x40 [ 9.682511] el0_svc_compat+0x8/0x10 [ 9.686076] Code: `a94257f6` f9400bf7 a8c47bfd d65f03c0 (d4210000) [ 9.692155] ---[ end trace 7621f966afbf0a29 ]--- [ 9.697385] Kernel panic - not syncing: Fatal exception [ 9.702599] SMP: stopping secondary CPUs [ 9.706549] Kernel Offset: 0x1c03600000 from 0xffffffc010000000 [ 9.712456] PHYS_OFFSET: 0xfffffff440000000 [ 9.716625] CPU features: 0x080026,2a80aa18 [ 9.720795] Memory Limit: none Fixes: `5c14a5f944` ("mt76: mt7921: introduce mt7921e support") Reported-by: Claire Chang <tientzu@google.com> Co-developed-by: YN Chen <YN.Chen@mediatek.com> Signed-off-by: YN Chen <YN.Chen@mediatek.com> Signed-off-by: Sean Wang <sean.wang@mediatek.com> Signed-off-by: Felix Fietkau <nbd@nbd.name>		History 2021-04-12 23:07:11 +02:00
arch	Merge git://git.kernel.org:/pub/scm/linux/kernel/git/netdev/net	2021-03-09 17:15:56 -08:00
block	block/bfq: update comments and default value in docs for fifo_expire	2021-03-02 11:25:38 -07:00
certs	certs: Replace K{U,G}IDT_INIT() with GLOBAL_ROOT_{U,G}ID	2021-01-21 16:16:10 +00:00
crypto	crypto: mips/poly1305 - enable for all MIPS processors	2021-03-08 11:52:17 +01:00
Documentation	dt-bindings:net:wireless:mediatek,mt76: txt to yaml conversion	2021-04-12 00:03:05 +02:00
drivers	mt76: mt7921: fix kernel crash when the firmware fails to download	2021-04-12 23:07:11 +02:00
fs	pstore fixes for v5.12-rc2	2021-03-05 17:21:25 -08:00
include	psample: Add additional metadata attributes	2021-03-14 15:00:43 -07:00
init	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-03-09 18:07:05 -08:00
ipc	fs: make helpers idmap mount aware	2021-01-24 14:27:20 +01:00
kernel	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-03-09 18:07:05 -08:00
lib	Merge git://git.kernel.org:/pub/scm/linux/kernel/git/davem/sparc	2021-03-08 22:01:58 -08:00
LICENSES	LICENSES: Add the CC-BY-4.0 license	2020-12-08 10:33:27 -07:00
mm	swap: fix swapfile read/write offset	2021-03-02 17:25:46 -07:00
net	psample: Add additional metadata attributes	2021-03-14 15:00:43 -07:00
samples	samples: pktgen: new append mode	2021-03-14 14:22:38 -07:00
scripts	Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next	2021-03-09 18:07:05 -08:00
security	nexthop: Add netlink defines and enumerators for resilient NH groups	2021-03-11 16:12:59 -08:00
sound	ALSA: hda/realtek: Apply dual codec quirks for MSI Godlike X570 board	2021-03-03 15:25:03 +01:00
tools	selftests: mlxsw: Add tc sample tests	2021-03-14 15:00:44 -07:00
usr	Kbuild updates for v5.12	2021-02-25 10:17:31 -08:00
virt	KVM: x86/mmu: Consider the hva in mmu_notifier retry	2021-02-22 13:16:53 -05:00
.clang-format	cxl for 5.12	2021-02-24 09:38:36 -08:00
.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	clang-lto series for v5.12-rc1	2021-02-23 09:28:51 -08:00
.mailmap	treewide: Miguel has moved	2021-02-26 09:41:03 -08:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	treewide: Miguel has moved	2021-02-26 09:41:03 -08:00
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	staging: dpaa2-switch: move the driver out of staging	2021-03-10 13:30:36 -08:00
Makefile	Linux 5.12-rc2	2021-03-05 17:33:41 -08:00
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.