From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D032D3E9F86 for ; Sat, 28 Feb 2026 17:51:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772301070; cv=none; b=epm5IvbWfkc/LeLFk7NWsgiEtVZ0mwvJRa8TOCnTEyZ/0yCPGTuOntqnB5vYT42vcZy011MtuC9lhQfKd6Il3vW993ZTebaYB7+qIvcx1Deldpva1JlR/RnqYBaHs2NFTTJ0jYlRxyw8zqxz2iYqoye+vRrK198pWkGQCRm1TJM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772301070; c=relaxed/simple; bh=PRhyiLXJEkJyR4tDp6iDYpalkIQVH02kJMwoKwrf8Oc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=E2ty5+pP9j5fYWkcUUYl+yNFYNnwUJKNQRfh7as5+rVvWmI6XvPhF3itMMWxLg+kTjN0Ei/GWTQ88f6CWkcMLTbuM+rQGR2fmmi/x3TAvgUyqRa/lFYhD09zhTHktyjIsa4vnr1AshdeMbvuA2VEpjvqbz6F1r+t0IYvmEuYJJc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XVQDJhkV; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="XVQDJhkV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4161EC19423; Sat, 28 Feb 2026 17:51:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772301070; bh=PRhyiLXJEkJyR4tDp6iDYpalkIQVH02kJMwoKwrf8Oc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XVQDJhkV7MJrIBO+4/zMNjV17leDbSYycURQoRWJOpLeLM+y1jfPX8Y9CIec3DsZS JHt50bkGDIM1MEvrZnkj16RoTzd0vxuZO2yHzpzH8DI399r5Q8W+TVD98cdeHtkgbk evcqBeq53zL/xtlG5JGPqAmnxhl0eSVyAAkv6nfbQZ4amWQ7Az6I4ebzz8q5K35mkf +xgHgffdgjklQ1RTO4Ge6vGRsbhTexAzMF9tSKKQSkcWwxkJpIRAv+psEEeEksa9O7 bd47NqK6R20z8Cz0gKi5JAZPmsWeCMWyWHlQBUJT5q6tMX7/KH1dsjYpMfHyKtlIFa g5y1nDJ0ALxXw== From: Sasha Levin To: patches@lists.linux.dev Cc: Bitterblue Smith , Ping-Ke Shih , Sasha Levin Subject: [PATCH 6.18 215/752] wifi: rtw88: 8822b: Avoid WARNING in rtw8822b_config_trx_mode() Date: Sat, 28 Feb 2026 12:38:46 -0500 Message-ID: <20260228174750.1542406-215-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260228174750.1542406-1-sashal@kernel.org> References: <20260228174750.1542406-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Bitterblue Smith [ Upstream commit 44d1f624bbdd2d60319374ba85f7195a28d00c90 ] 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: 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 ---[ end trace 0000000000000000 ]--- Link: https://github.com/lwfinger/rtw88/issues/366 Signed-off-by: Bitterblue Smith Acked-by: Ping-Ke Shih Signed-off-by: Ping-Ke Shih Link: https://patch.msgid.link/fb9a3444-9319-4aa2-8719-35a6308bf568@gmail.com Signed-off-by: Sasha Levin --- drivers/net/wireless/realtek/rtw88/rtw8822b.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822b.c b/drivers/net/wireless/realtek/rtw88/rtw8822b.c index 89b6485b229a8..4d88cc2f41485 100644 --- a/drivers/net/wireless/realtek/rtw88/rtw8822b.c +++ b/drivers/net/wireless/realtek/rtw88/rtw8822b.c @@ -1005,7 +1005,8 @@ static int rtw8822b_set_antenna(struct rtw_dev *rtwdev, hal->antenna_tx = antenna_tx; hal->antenna_rx = antenna_rx; - rtw8822b_config_trx_mode(rtwdev, antenna_tx, antenna_rx, false); + if (test_bit(RTW_FLAG_POWERON, rtwdev->flags)) + rtw8822b_config_trx_mode(rtwdev, antenna_tx, antenna_rx, false); return 0; } -- 2.51.0