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Bitterblue Smith 0d0c2fb80c wifi: rtw88: 8822b: Avoid WARNING in rtw8822b_config_trx_mode() [ Upstream commit `44d1f624bb` ] rtw8822b_set_antenna() can be called from userspace when the chip is powered off. In that case a WARNING is triggered in rtw8822b_config_trx_mode() because trying to read the RF registers when the chip is powered off returns an unexpected value. Call rtw8822b_config_trx_mode() in rtw8822b_set_antenna() only when the chip is powered on. ------------[ cut here ]------------ write RF mode table fail WARNING: CPU: 0 PID: 7183 at rtw8822b.c:824 rtw8822b_config_trx_mode.constprop.0+0x835/0x840 [rtw88_8822b] CPU: 0 UID: 0 PID: 7183 Comm: iw Tainted: G W OE 6.17.5-arch1-1 #1 PREEMPT(full) 01c39fc421df2af799dd5e9180b572af860b40c1 Tainted: [W]=WARN, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE Hardware name: LENOVO 82KR/LNVNB161216, BIOS HBCN18WW 08/27/2021 RIP: 0010:rtw8822b_config_trx_mode.constprop.0+0x835/0x840 [rtw88_8822b] Call Trace: <TASK> rtw8822b_set_antenna+0x57/0x70 [rtw88_8822b 370206f42e5890d8d5f48eb358b759efa37c422b] rtw_ops_set_antenna+0x50/0x80 [rtw88_core 711c8fb4f686162be4625b1d0b8e8c6a5ac850fb] ieee80211_set_antenna+0x60/0x100 [mac80211 f1845d85d2ecacf3b71867635a050ece90486cf3] nl80211_set_wiphy+0x384/0xe00 [cfg80211 296485ee85696d2150309a6d21a7fbca83d3dbda] ? netdev_run_todo+0x63/0x550 genl_family_rcv_msg_doit+0xfc/0x160 genl_rcv_msg+0x1aa/0x2b0 ? __pfx_nl80211_pre_doit+0x10/0x10 [cfg80211 296485ee85696d2150309a6d21a7fbca83d3dbda] ? __pfx_nl80211_set_wiphy+0x10/0x10 [cfg80211 296485ee85696d2150309a6d21a7fbca83d3dbda] ? __pfx_nl80211_post_doit+0x10/0x10 [cfg80211 296485ee85696d2150309a6d21a7fbca83d3dbda] ? __pfx_genl_rcv_msg+0x10/0x10 netlink_rcv_skb+0x59/0x110 genl_rcv+0x28/0x40 netlink_unicast+0x285/0x3c0 ? __alloc_skb+0xdb/0x1a0 netlink_sendmsg+0x20d/0x430 ____sys_sendmsg+0x39f/0x3d0 ? import_iovec+0x2f/0x40 ___sys_sendmsg+0x99/0xe0 ? refill_obj_stock+0x12e/0x240 __sys_sendmsg+0x8a/0xf0 do_syscall_64+0x81/0x970 ? do_syscall_64+0x81/0x970 ? ksys_read+0x73/0xf0 ? do_syscall_64+0x81/0x970 ? count_memcg_events+0xc2/0x190 ? handle_mm_fault+0x1d7/0x2d0 ? do_user_addr_fault+0x21a/0x690 ? exc_page_fault+0x7e/0x1a0 entry_SYSCALL_64_after_hwframe+0x76/0x7e </TASK> ---[ end trace 0000000000000000 ]--- Link: https://github.com/lwfinger/rtw88/issues/366 Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com> Acked-by: Ping-Ke Shih <pkshih@realtek.com> Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> Link: https://patch.msgid.link/fb9a3444-9319-4aa2-8719-35a6308bf568@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2026-03-04 07:21:10 -05:00
arch	parisc: Prevent interrupts during reboot	2026-03-04 07:20:59 -05:00
block	block: decouple secure erase size limit from discard size limit	2026-03-04 07:20:56 -05:00
certs	sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3	2024-09-20 19:52:48 +03:00
crypto	crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec	2026-01-30 10:28:39 +01:00
Documentation	ASoC: dt-bindings: asahi-kasei,ak5558: Fix the supply names	2026-03-04 07:20:48 -05:00
drivers
fs
include
init	init: handle bootloader identifier in kernel parameters	2025-10-19 16:33:50 +02:00
io_uring	io_uring/cancel: de-unionize file and user_data in struct io_cancel_data	2026-03-04 07:20:34 -05:00
ipc	ipc: don't audit capability check in ipc_permissions()	2026-03-04 07:20:07 -05:00
kernel	sched/debug: Fix updating of ppos on server write ops	2026-03-04 07:20:58 -05:00
lib	objpool: fix the overestimation of object pooling metadata size	2026-03-04 07:20:35 -05:00
LICENSES	LICENSES: add 0BSD license text	2024-09-01 20:43:24 -07:00
mm	mm/hugetlb: fix excessive IPI broadcasts when unsharing PMD tables using mmu_gather	2026-02-19 16:29:55 +01:00
net
rust	rust: rbtree: fix documentation typo in CursorMut peek_next method	2026-02-06 16:55:44 +01:00
samples	samples/ftrace: Adjust LoongArch register restore order in direct calls	2026-01-08 10:14:50 +01:00
scripts
security	apparmor: fix aa_label to return state from compount and component match	2026-03-04 07:20:41 -05:00
sound
tools
usr	kbuild: uapi: Strip comments before size type check	2025-11-13 15:34:35 -05:00
virt	KVM: Don't clobber irqfd routing type when deassigning irqfd	2026-02-11 13:40:17 +01:00
.clang-format	clang-format: Update with v6.11-rc1's `for_each` macro list	2024-08-02 13:20:31 +02:00
.clippy.toml	rust: give Clippy the minimum supported Rust version	2025-08-01 09:48:44 +01:00
.cocciconfig
.editorconfig
.get_maintainer.ignore
.gitattributes
.gitignore	rust: introduce `.clippy.toml`	2025-03-13 13:01:42 +01:00
.mailmap
.rustfmt.toml
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: Remove self from DSA entry	2024-11-03 12:52:38 -08:00
Kbuild	Kbuild updates for v6.1	2022-10-10 12:00:45 -07:00
Kconfig
MAINTAINERS	gpiolib-acpi: Update file references in the Documentation and MAINTAINERS	2026-02-11 13:40:29 +01:00
Makefile	kbuild: Add objtool to top-level clean target	2026-03-04 07:20:35 -05:00
README

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 reStructuredText 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.