alistair23-linux

redonkable

Fork of alistair23 Linux kernel for reMarkable from https://github.com/alistair23/linux

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Enric Balletbo i Serra a8f62f1830 Revert "thermal: mediatek: fix register index error" This reverts commit `eb9aecd90d` The above patch is supposed to fix a register index error on mt2701. It is not clear if the problem solved is a hang or just an invalid value returned, my guess is the second. The patch introduces, though, a new hang on MT8173 device making them unusable. So, seems reasonable, revert the patch because introduces a worst issue. The reason I send a revert instead of trying to fix the issue for MT8173 is because the information needed to fix the issue is in the datasheet and is not public. So I am not really able to fix it. Fixes the following bug when CONFIG_MTK_THERMAL is set on MT8173 devices. [ 2.222488] Unable to handle kernel paging request at virtual address ffff8000125f5001 [ 2.230421] Mem abort info: [ 2.233207] ESR = 0x96000021 [ 2.236261] EC = 0x25: DABT (current EL), IL = 32 bits [ 2.241571] SET = 0, FnV = 0 [ 2.244623] EA = 0, S1PTW = 0 [ 2.247762] Data abort info: [ 2.250640] ISV = 0, ISS = 0x00000021 [ 2.254473] CM = 0, WnR = 0 [ 2.257544] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000041850000 [ 2.264251] [ffff8000125f5001] pgd=000000013ffff003, pud=000000013fffe003, pmd=000000013fff9003, pte=006800001100b707 [ 2.274867] Internal error: Oops: 96000021 [#1] PREEMPT SMP [ 2.280432] Modules linked in: [ 2.283483] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.7.0-rc6+ #162 [ 2.289914] Hardware name: Google Elm (DT) [ 2.294003] pstate: 20000005 (nzCv daif -PAN -UAO) [ 2.298792] pc : mtk_read_temp+0xb8/0x1c8 [ 2.302793] lr : mtk_read_temp+0x7c/0x1c8 [ 2.306794] sp : ffff80001003b930 [ 2.310100] x29: ffff80001003b930 x28: 0000000000000000 [ 2.315404] x27: 0000000000000002 x26: ffff0000f9550b10 [ 2.320709] x25: ffff0000f9550a80 x24: 0000000000000090 [ 2.326014] x23: ffff80001003ba24 x22: 00000000610344c0 [ 2.331318] x21: 0000000000002710 x20: 00000000000001f4 [ 2.336622] x19: 0000000000030d40 x18: ffff800011742ec0 [ 2.341926] x17: 0000000000000001 x16: 0000000000000001 [ 2.347230] x15: ffffffffffffffff x14: ffffff0000000000 [ 2.352535] x13: ffffffffffffffff x12: 0000000000000028 [ 2.357839] x11: 0000000000000003 x10: ffff800011295ec8 [ 2.363143] x9 : 000000000000291b x8 : 0000000000000002 [ 2.368447] x7 : 00000000000000a8 x6 : 0000000000000004 [ 2.373751] x5 : 0000000000000000 x4 : ffff800011295cb0 [ 2.379055] x3 : 0000000000000002 x2 : ffff8000125f5001 [ 2.384359] x1 : 0000000000000001 x0 : ffff0000f9550a80 [ 2.389665] Call trace: [ 2.392105] mtk_read_temp+0xb8/0x1c8 [ 2.395760] of_thermal_get_temp+0x2c/0x40 [ 2.399849] thermal_zone_get_temp+0x78/0x160 [ 2.404198] thermal_zone_device_update.part.0+0x3c/0x1f8 [ 2.409589] thermal_zone_device_update+0x34/0x48 [ 2.414286] of_thermal_set_mode+0x58/0x88 [ 2.418375] thermal_zone_of_sensor_register+0x1a8/0x1d8 [ 2.423679] devm_thermal_zone_of_sensor_register+0x64/0xb0 [ 2.429242] mtk_thermal_probe+0x690/0x7d0 [ 2.433333] platform_drv_probe+0x5c/0xb0 [ 2.437335] really_probe+0xe4/0x448 [ 2.440901] driver_probe_device+0xe8/0x140 [ 2.445077] device_driver_attach+0x7c/0x88 [ 2.449252] __driver_attach+0xac/0x178 [ 2.453082] bus_for_each_dev+0x78/0xc8 [ 2.456909] driver_attach+0x2c/0x38 [ 2.460476] bus_add_driver+0x14c/0x230 [ 2.464304] driver_register+0x6c/0x128 [ 2.468131] __platform_driver_register+0x50/0x60 [ 2.472831] mtk_thermal_driver_init+0x24/0x30 [ 2.477268] do_one_initcall+0x50/0x298 [ 2.481098] kernel_init_freeable+0x1ec/0x264 [ 2.485450] kernel_init+0x1c/0x110 [ 2.488931] ret_from_fork+0x10/0x1c [ 2.492502] Code: f9401081 f9400402 b8a67821 8b010042 (b9400042) [ 2.498599] ---[ end trace e43e3105ed27dc99 ]--- [ 2.503367] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b [ 2.511020] SMP: stopping secondary CPUs [ 2.514941] Kernel Offset: disabled [ 2.518421] CPU features: 0x090002,25006005 [ 2.522595] Memory Limit: none [ 2.525644] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]-- Cc: Michael Kao <michael.kao@mediatek.com> Fixes: `eb9aecd90d` ("thermal: mediatek: fix register index error") Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20200707103412.1010823-1-enric.balletbo@collabora.com		2020-07-15 11:12:48 +02:00
Documentation	Peter Zijlstra says:	2020-06-28 09:42:47 -07:00
LICENSES	LICENSES: Rename other to deprecated	2019-05-03 06:34:32 -06:00
arch	ARM: OMAP fixes for v5.8	2020-06-28 14:57:14 -07:00
block	block-5.8-2020-06-26	2020-06-27 08:59:32 -07:00
certs	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
crypto	crypto: drbg - always try to free Jitter RNG instance	2020-06-15 17:38:54 +10:00
drivers	Revert "thermal: mediatek: fix register index error"	2020-07-15 11:12:48 +02:00
fs	- Fix build regression on v4.8 and older	2020-06-28 11:42:16 -07:00
include	A single DocBook fix.	2020-06-28 11:59:08 -07:00
init	Kbuild updates for v5.8 (2nd)	2020-06-13 13:29:16 -07:00
ipc	mmap locking API: use coccinelle to convert mmap_sem rwsem call sites	2020-06-09 09:39:14 -07:00
kernel	Peter Zijlstra says:	2020-06-28 10:37:39 -07:00
lib	Peter Zijlstra says:	2020-06-28 09:42:47 -07:00
mm	mm/memory_hotplug.c: fix false softlockup during pfn range removal	2020-06-26 00:27:38 -07:00
net	NFS Client Bugfixes for Linux 5.8-rc	2020-06-27 09:35:47 -07:00
samples	Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net	2020-06-25 18:27:40 -07:00
scripts	Paul E. McKenney says:	2020-06-28 10:29:38 -07:00
security	selinux/stable-5.8 PR 20200621	2020-06-21 15:41:24 -07:00
sound	sound fixes for 5.8-rc3	2020-06-25 09:15:24 -07:00
tools	Peter Zijlstra says:	2020-06-28 10:16:15 -07:00
usr	bpfilter: match bit size of bpfilter_umh to that of the kernel	2020-05-17 18:52:01 +09:00
virt	MIPS:	2020-06-12 11:05:52 -07:00
.clang-format	block: add bio_for_each_bvec_all()	2020-05-25 11:25:24 +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	modpost: generate vmlinux.symvers and reuse it for the second modpost	2020-06-06 23:38:12 +09:00
.mailmap	A fair amount of stuff this time around, dominated by yet another massive	2020-06-01 15:45:27 -07:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	mailmap: change email for Ricardo Ribalda	2020-05-25 18:59:59 -06:00
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	ARM: SoC fixes for v5.8	2020-06-28 14:55:18 -07:00
Makefile	Linux 5.8-rc3	2020-06-28 15:00:24 -07:00
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.