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Xu Yang c2a3b181f0 Revert "usb: typec: tcpm: clear pd_event queue in PORT_RESET" 
commit 21ea1ce37f upstream.

This reverts commit bf20c69cf3.

During tcpm_init() stage, if the VBUS is still present after
tcpm_reset_port(), then we assume that VBUS will off and goto safe0v
after a specific discharge time. Following a TCPM_VBUS_EVENT event if
VBUS reach to off state. TCPM_VBUS_EVENT event may be set during
PORT_RESET handling stage. If pd_events reset to 0 after TCPM_VBUS_EVENT
set, we will lost this VBUS event. Then the port state machine may stuck
at one state.

Before:

[    2.570172] pending state change PORT_RESET -> PORT_RESET_WAIT_OFF @ 100 ms [rev1 NONE_AMS]
[    2.570179] state change PORT_RESET -> PORT_RESET_WAIT_OFF [delayed 100 ms]
[    2.570182] pending state change PORT_RESET_WAIT_OFF -> SNK_UNATTACHED @ 920 ms [rev1 NONE_AMS]
[    3.490213] state change PORT_RESET_WAIT_OFF -> SNK_UNATTACHED [delayed 920 ms]
[    3.490220] Start toggling
[    3.546050] CC1: 0 -> 0, CC2: 0 -> 2 [state TOGGLING, polarity 0, connected]
[    3.546057] state change TOGGLING -> SRC_ATTACH_WAIT [rev1 NONE_AMS]

After revert this patch, we can see VBUS off event and the port will goto
expected state.

[    2.441992] pending state change PORT_RESET -> PORT_RESET_WAIT_OFF @ 100 ms [rev1 NONE_AMS]
[    2.441999] state change PORT_RESET -> PORT_RESET_WAIT_OFF [delayed 100 ms]
[    2.442002] pending state change PORT_RESET_WAIT_OFF -> SNK_UNATTACHED @ 920 ms [rev1 NONE_AMS]
[    2.442122] VBUS off
[    2.442125] state change PORT_RESET_WAIT_OFF -> SNK_UNATTACHED [rev1 NONE_AMS]
[    2.442127] VBUS VSAFE0V
[    2.442351] CC1: 0 -> 0, CC2: 0 -> 0 [state SNK_UNATTACHED, polarity 0, disconnected]
[    2.442357] Start toggling
[    2.491850] CC1: 0 -> 0, CC2: 0 -> 2 [state TOGGLING, polarity 0, connected]
[    2.491858] state change TOGGLING -> SRC_ATTACH_WAIT [rev1 NONE_AMS]
[    2.491863] pending state change SRC_ATTACH_WAIT -> SNK_TRY @ 200 ms [rev1 NONE_AMS]
[    2.691905] state change SRC_ATTACH_WAIT -> SNK_TRY [delayed 200 ms]

Fixes: bf20c69cf3 ("usb: typec: tcpm: clear pd_event queue in PORT_RESET")
Cc: stable@vger.kernel.org
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20240809112901.535072-1-xu.yang_2@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2024-08-29 17:33:10 +02:00
arch KVM: arm64: Don't pass a TLBI level hint when zapping table entries 2024-08-19 06:04:31 +02:00
block block: fix deadlock between sd_remove & sd_release 2024-08-03 08:54:24 +02:00
certs certs: Reference revocation list for all keyrings 2023-08-17 20:12:41 +00:00
crypto crypto: aead,cipher - zeroize key buffer after use 2024-07-11 12:49:04 +02:00
Documentation mm/page_table_check: support userfault wr-protect entries 2024-08-19 06:04:29 +02:00
drivers Revert "usb: typec: tcpm: clear pd_event queue in PORT_RESET" 2024-08-29 17:33:10 +02:00
fs Revert "jfs: fix shift-out-of-bounds in dbJoin" 2024-08-19 06:04:30 +02:00
include Revert "misc: fastrpc: Restrict untrusted app to attach to privileged PD" 2024-08-29 17:33:10 +02:00
init rust: SHADOW_CALL_STACK is incompatible with Rust 2024-08-11 12:47:24 +02:00
io_uring io_uring: fix io_match_task must_hold 2024-08-03 08:54:41 +02:00
ipc sysctl: treewide: drop unused argument ctl_table_root::set_ownership(table) 2024-08-11 12:47:13 +02:00
kernel bpf: Avoid kfree_rcu() under lock in bpf_lpm_trie. 2024-08-19 06:04:27 +02:00
lib lib/build_OID_registry: don't mention the full path of the script in output 2024-08-03 08:54:32 +02:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm mm/debug_vm_pgtable: drop RANDOM_ORVALUE trick 2024-08-19 06:04:31 +02:00
net fou: remove warn in gue_gro_receive on unsupported protocol 2024-08-19 06:04:30 +02:00
rust rust: kernel: require Send for Module implementations 2024-05-17 12:01:56 +02:00
samples bpf: Replace bpf_lpm_trie_key 0-length array with flexible array 2024-08-19 06:04:27 +02:00
scripts kbuild: avoid build error when single DTB is turned into composite DTB 2024-08-03 08:54:36 +02:00
security apparmor: Fix null pointer deref when receiving skb during sock creation 2024-08-03 08:54:38 +02:00
sound ALSA: usb: Fix UBSAN warning in parse_audio_unit() 2024-08-19 06:04:30 +02:00
tools bpf: Replace bpf_lpm_trie_key 0-length array with flexible array 2024-08-19 06:04:27 +02:00
usr initramfs: Encode dependency on KBUILD_BUILD_TIMESTAMP 2023-06-06 17:54:49 +09:00
virt KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin() 2024-06-27 13:49:11 +02:00
.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: rename binkernel.spec to kernel.spec 2023-07-25 00:59:33 +09:00
.mailmap 20 hotfixes. 12 are cc:stable and the remainder address post-6.5 issues 2023-10-24 09:52:16 -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 pwm: Rename pwm_apply_state() to pwm_apply_might_sleep() 2024-06-12 11:12:24 +02:00
Makefile Linux 6.6.47 2024-08-19 06:04:32 +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.