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Bryan O'Donoghue ab7a781fd6 OPP: Fix _set_required_opps when opp is NULL 
_set_required_opps can be called with opp NULL in _disable_opp_table().

commit e37440e7e2 ("OPP: Call dev_pm_opp_set_opp() for required OPPs")
requires the opp pointer to be non-NULL to function.

[   81.253439] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000048
[   81.438407] Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT)
[   81.445296] Workqueue: pm pm_runtime_work
[   81.449446] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   81.456609] pc : _set_required_opps+0x178/0x28c
[   81.461288] lr : _set_required_opps+0x178/0x28c
[   81.465962] sp : ffff80008078bb00
[   81.469375] x29: ffff80008078bb00 x28: ffffd1cd71bfe308 x27: 0000000000000000
[   81.476730] x26: ffffd1cd70ebc578 x25: ffffd1cd70a08710 x24: 00000000ffffffff
[   81.484083] x23: 00000000ffffffff x22: 0000000000000000 x21: ffff56ff892b3c48
[   81.491435] x20: ffff56f1071c10 x19: 0000000000000000 x18: ffffffffffffffff
[   81.498788] x17: 2030207865646e69 x16: 2030303131207370 x15: 706f5f6465726975
[   81.506141] x14: 7165725f7465735f x13: ffff5700f5c00000 x12: 00000000000008ac
[   81.513495] x11: 00000000000002e4 x10: ffff5700f6700000 x9 : ffff5700f5c00000
[   81.520848] x8 : 00000000fffdffff x7 : ffff5700f6700000 x6 : 80000000fffe0000
[   81.528200] x5 : ffff5700fef40d08 x4 : 0000000000000000 x3 : 0000000000000000
[   81.535551] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff56ff81298f80
[   81.542904] Call trace:
[   81.545437]  _set_required_opps+0x178/0x28c
[   81.549754]  _set_opp+0x3fc/0x5c0
[   81.553181]  dev_pm_opp_set_rate+0x90/0x26c
[   81.557498]  core_power_v4+0x44/0x15c [venus_core]
[   81.562509]  venus_runtime_suspend+0x40/0xd0 [venus_core]
[   81.568135]  pm_generic_runtime_suspend+0x2c/0x44
[   81.572983]  __rpm_callback+0x48/0x1d8
[   81.576852]  rpm_callback+0x6c/0x78
[   81.580453]  rpm_suspend+0x10c/0x570
[   81.584143]  pm_runtime_work+0xc4/0xc8
[   81.588011]  process_one_work+0x138/0x244
[   81.592153]  worker_thread+0x320/0x438
[   81.596021]  kthread+0x110/0x114
[   81.599355]  ret_from_fork+0x10/0x20
[   81.603052] Code: f10000ff fa5410e0 54fffbe1 97f05ae8 (f94026c5)
[   81.609317] ---[ end trace 0000000000000000 ]---

Fix it.

Fixes: e37440e7e2 ("OPP: Call dev_pm_opp_set_opp() for required OPPs")
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
[ Viresh: Implemented the fix differently ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
History 2023-12-28 10:55:27 +05:30
arch parisc architecture fixes for kernel v6.7-rc1 (part 2): 2023-11-12 11:05:31 -08:00
block blk-core: use pr_warn_ratelimited() in bio_check_ro() 2023-11-07 08:15:23 -07:00
certs This update includes the following changes: 2023-11-02 16:15:30 -10:00
crypto This push fixes a regression in ahash and hides the Kconfig sub-options for the jitter RNG. 2023-11-09 17:04:58 -08:00
Documentation Probes fixes for v6.7-rc1: 2023-11-10 16:35:04 -08:00
drivers OPP: Fix _set_required_opps when opp is NULL 2023-12-28 10:55:27 +05:30
fs Sixteen smb3/cifs client fixes 2023-11-11 17:17:22 -08:00
include OPP: The level field is always of unsigned int type 2023-12-27 13:27:30 +05:30
init As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
io_uring io_uring: do not clamp read length for multishot read 2023-11-06 13:41:58 -07:00
ipc Many singleton patches against the MM code. The patch series which are 2023-11-02 19:38:47 -10:00
kernel Probes fixes for v6.7-rc1: 2023-11-10 16:35:04 -08:00
lib lib: test_objpool: make global variables static 2023-11-10 19:59:04 +09:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm memblock: report failures when memblock_can_resize is not set 2023-11-08 09:40:13 -08:00
net Including fixes from netfilter and bpf. 2023-11-09 17:09:35 -08:00
rust Kbuild updates for v6.7 2023-11-04 08:07:19 -10:00
samples Landlock updates for v6.7-rc1 2023-11-03 09:28:53 -10:00
scripts Kbuild updates for v6.7 2023-11-04 08:07:19 -10:00
security + Features 2023-11-03 09:48:17 -10:00
sound sound fixes for 6.7-rc1 2023-11-10 11:57:51 -08:00
tools LoongArch changes for v6.7 2023-11-12 10:58:08 -08:00
usr arch: Remove Itanium (IA-64) architecture 2023-09-11 08:13:17 +00:00
virt ARM: 2023-09-07 13:52:20 -07:00
.clang-format iommu: Add for_each_group_device() 2023-05-23 08:15:51 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: rpm-pkg: generate kernel.spec in rpmbuild/SPECS/ 2023-10-03 20:49:09 +09:00
.mailmap As usual, lots of singleton and doubleton patches all over the tree and 2023-11-02 20:53:31 -10:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS USB: Remove Wireless USB and UWB documentation 2023-08-09 14:17:32 +02:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS - removed AR7 platform support 2023-11-10 09:19:46 -08:00
Makefile Linux 6.7-rc1 2023-11-12 16:19:07 -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.