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Łukasz Bartosik 3cdcfa3c52 pinctrl: intel: fix unexpected interrupt 
commit e986f0e602 upstream.

ASUS Chromebook C223 with Celeron N3350 crashes sometimes during
cold booot. Inspection of the kernel log showed that it gets into
an inifite loop logging the following message:

->handle_irq():  000000009cdb51e8, handle_bad_irq+0x0/0x251
->irq_data.chip(): 000000005ec212a7, 0xffffa043009d8e7
->action(): 00000
   IRQ_NOPROBE set
unexpected IRQ trap at vector 7c

The issue happens during cold boot but only if cold boot happens
at most several dozen seconds after Chromebook is powered off. For
longer intervals between power off and power on (cold boot) the issue
does not reproduce. The unexpected interrupt is sourced from INT3452
GPIO pin which is used for SD card detect. Investigation relevealed
that when the interval between power off and power on (cold boot)
is less than several dozen seconds then values of INT3452 GPIO interrupt
enable and interrupt pending registers survive power off and power
on sequence and interrupt for SD card detect pin is enabled and pending
during probe of SD controller which causes the unexpected IRQ message.
"Intel Pentium and Celeron Processor N- and J- Series" volume 3 doc
mentions that GPIO interrupt enable and status registers default
value is 0x0.
The fix clears INT3452 GPIO interrupt enabled and interrupt pending
registers in its probe function.

Fixes: 7981c0015a ("pinctrl: intel: Add Intel Sunrisepoint pin controller and GPIO support")
Signed-off-by: Łukasz Bartosik <lb@semihalf.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-02-08 18:34:11 +01:00
arch KVM: arm64: Stop handle_exit() from handling HVC twice when an SError occurs 2022-02-08 18:34:06 +01:00
block block: bio-integrity: Advance seed correctly for larger interval sizes 2022-02-08 18:34:05 +01:00
certs certs: Add support for using elliptic curve keys for signing modules 2021-08-23 19:55:42 +03:00
crypto crypto: jitter - consider 32 LSB for APT 2022-01-27 11:04:31 +01:00
Documentation Revert "fbcon: Disable accelerated scrolling" 2022-02-08 18:34:06 +01:00
drivers pinctrl: intel: fix unexpected interrupt 2022-02-08 18:34:11 +01:00
fs Revert "fs/9p: search open fids first" 2022-02-08 18:34:04 +01:00
include mm/pgtable: define pte_index so that preprocessor could recognize it 2022-02-08 18:34:05 +01:00
init init: make unknown command line param message clearer 2021-11-18 19:17:11 +01:00
ipc ipc/sem: do not sleep with a spin lock held 2022-02-08 18:34:03 +01:00
kernel audit: improve audit queue handling when "audit=1" on cmdline 2022-02-08 18:34:03 +01:00
lib lib/test_meminit: destroy cache in kmem_cache_alloc_bulk() test 2022-01-27 11:05:44 +01:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm/kmemleak: avoid scanning potential huge holes 2022-02-08 18:34:05 +01:00
net net/smc: Forward wakeup to smc socket waitqueue after fallback 2022-02-08 18:34:09 +01:00
samples samples: bpf: Fix 'unknown warning group' build warning on Clang 2022-01-27 11:03:29 +01:00
scripts scripts: sphinx-pre-install: Fix ctex support on Debian 2022-01-27 11:05:44 +01:00
security selinux: fix double free of cond_list on error paths 2022-02-08 18:34:02 +01:00
sound ASoC: codecs: wcd938x: fix return value of mixer put function 2022-02-08 18:34:11 +01:00
tools selftests: mptcp: fix ipv6 routing setup 2022-02-05 12:38:56 +01:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:27:15 +01:00
virt Revert "KVM: SVM: avoid infinite loop on NPF from bad address" 2022-02-01 17:27:01 +01:00
.clang-format clang-format: Update with the latest for_each macro list 2021-05-12 23:32:39 +02:00
.cocciconfig
.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 .gitignore: ignore only top-level modules.builtin 2021-05-02 00:43:35 +09:00
.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 drm fixes for 5.15 final 2021-10-28 12:17:01 -07:00
Makefile Linux 5.15.21 2022-02-05 19:21:09 +01:00
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.