From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail11.truemail.it (mail11.truemail.it [217.194.8.81]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A818020B7EC; Tue, 8 Apr 2025 08:35:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.194.8.81 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744101322; cv=none; b=LPaBnutsbihb1eA3GsKB9N+83qHY4ttCQDM+7+nDUekjnPelmR4My1vxebUIUx4+IYp3LxGe7u0IzFyi9IoEvDz6GVB8y5b3YZ/Dh+TXmgwwULYPEzurLZF9NQnTC+BbE0+m2SPKzfV8ecf5t5a6CXkftTY/5GpQidThg7d+pao= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744101322; c=relaxed/simple; bh=KzjoqOqYDCXtxlc3Hol6YOIfBy2OmCIPyYdnm6eJh8g=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=fgFDEah70s85jWtYNDw5KHMAeKQo1KyB1iGX+dFdjIr3GgA877hMJlvmgxzNtFZuzrWa0ExvHqhLxSCrf2OxYH/i1uWloPJc97S+luOvlLeCxG8ofYagGFhkZk0bVKfJy9uRqbqfmwBSp8YRnRS30soTAxHRuEFWCEjngADmDWs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it; spf=pass smtp.mailfrom=dolcini.it; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b=OgsHMGm2; arc=none smtp.client-ip=217.194.8.81 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=dolcini.it Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=dolcini.it Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=dolcini.it header.i=@dolcini.it header.b="OgsHMGm2" Received: from francesco-nb (93-49-2-63.ip317.fastwebnet.it [93.49.2.63]) by mail11.truemail.it (Postfix) with ESMTPA id 0C34C1F91A; Tue, 8 Apr 2025 10:35:16 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=dolcini.it; s=default; t=1744101316; bh=RMIaEj3zohUGYvvm32lDbkghJh7svLhWp2HrTir4CEQ=; h=From:To:Subject; b=OgsHMGm2+PdrrEV5mCfAE5oP8QO9XF80IvOK/cePrdbUc1u7QirAzxIElhvqqSurv xgjRl6LWAnMuBoGM445fM1P5mISbMmP8TE2tzBX0lyV1GiZ8SL5KdDkClLXCc37drb x4PJ34ty2EArVKWLt4wU53U7kidEhueahDsrNkBrFdYRIla3V6IxzyHRR6ak4yIF9f VWx/ZqKh7T6nySZZruwG4thmNiaWTTJpChd3MPoQ02oUURwQD52N6iVSJv/pck16Ku ULblTiDOAdwF5gcIf1H/nnRQ6FLO1TQEddIP8hkv+QFeS7kRHPhKwj3ECF4f0AsiIY 6LQ5VtWHAmIGw== Date: Tue, 8 Apr 2025 10:35:12 +0200 From: Francesco Dolcini To: Amitkumar Karwar , Neeraj Kale , Nishanth Menon , Tero Kristo , Santosh Shilimkar Cc: linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org, linux-serial@vger.kernel.org Subject: Kernel WARNING (RCU) with btnxpuart on TI AM62 platform Message-ID: <20250408083512.GA26035@francesco-nb> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hello, I do have the following kernel warning with 6.15-rc1, on a TI AM62 platform (arm64), single CPU core, using btnxpuart driver, any idea? PREEMPT_RT is enabled, if it matters. Either the issue is not systematic, or multi cores SoCs are not affected (no error on the exact same image on a dual nor on quad core TI AM62). [ 23.139080] Voluntary context switch within RCU read-side critical section! [ 23.139119] WARNING: CPU: 0 PID: 61 at /kernel/rcu/tree_plugin.h:332 rcu_note_context_switch+0x3c4/0x430 [ 23.139172] Modules linked in: uas onboard_usb_dev optee_rng dwc3 evdev btnxpuart spidev aes_ce_blk aes_ce_cipher ghash_ce gf128mul sha2_ce sha256_arm64 sha1_ce snd_soc_simple_card snd_soc_simple_card_utils optee spi_cadence_quadspi tee gpio_keys usb_conn_gpio display_connector roles dwc3_am62 mwifiex_sdio k3_j72xx_bandgap mwifiex rtc_ti_k3 cfg80211 tidss sa2ul sha512_generic snd_soc_davinci_mcasp authenc drm_display_helper snd_soc_ti_udma crypto_null snd_soc_ti_edma sha1_generic snd_soc_ti_sdma omap_hwspinlock lontium_lt8912b ina2xx snd_soc_wm8904 ti_ads1015 industrialio_triggered_buffer kfifo_buf lm75 tpm_tis_i2c tps65219_pwrbutton crc_ccitt tpm_tis_core tpm rng_core tc358768 m_can_platform pwm_tiehrpwm m_can spi_omap2_mcspi can_dev bluetooth ecdh_generic ecc rfkill libaes loop fuse ipv6 autofs4 [ 23.139459] CPU: 0 UID: 0 PID: 61 Comm: kworker/u5:0 Not tainted 6.15.0-rc1-0.0.0-devel #1 PREEMPT_RT [ 23.139471] Hardware name: Toradex Verdin AM62 WB on Dahlia Board (DT) [ 23.139478] Workqueue: hci0 hci_power_off [bluetooth] [ 23.139615] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 23.139625] pc : rcu_note_context_switch+0x3c4/0x430 [ 23.139647] lr : rcu_note_context_switch+0x3c4/0x430 [ 23.139658] sp : ffff8000819fb740 [ 23.139661] x29: ffff8000819fb740 x28: 0000000000000000 x27: ffff0000079d2010 [ 23.139673] x26: ffff0000011e7810 x25: ffff000001c2c200 x24: 0000000000000000 [ 23.139688] x23: 0000000000000000 x22: ffff000001c2c200 x21: ffff000001c2c200 [ 23.139700] x20: ffff800081083ec0 x19: ffff00001da9fec0 x18: fffffffffffe7e78 [ 23.139712] x17: ffff7fff9ca1c000 x16: ffff800080000000 x15: ffff00001da9f8c0 [ 23.139726] x14: fffffffffffc7e77 x13: 216e6f6974636573 x12: 206c616369746972 [ 23.139738] x11: 6320656469732d64 x10: 6165722055435220 x9 : 206e696874697720 [ 23.139750] x8 : ffff80008113f040 x7 : ffff8000819fb4e0 x6 : 000000000000000c [ 23.139761] x5 : ffff00001da95888 x4 : 0000000000000000 x3 : 0000000000000027 [ 23.139775] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000001c2c200 [ 23.139788] Call trace: [ 23.139793] rcu_note_context_switch+0x3c4/0x430 (P) [ 23.139813] __schedule+0xa0/0x7dc [ 23.139830] schedule+0x34/0x11c [ 23.139841] schedule_timeout+0x8c/0x110 [ 23.139861] wait_for_completion_timeout+0x78/0x14c [ 23.139873] ti_sci_set_device_state+0x120/0x1fc [ 23.139886] ti_sci_cmd_get_device_exclusive+0x18/0x30 [ 23.139899] ti_sci_pd_power_on+0x28/0x54 [ 23.139916] _genpd_power_on+0x98/0x188 [ 23.139927] genpd_power_on+0xa8/0x168 [ 23.139940] genpd_runtime_resume+0xc0/0x298 [ 23.139957] __rpm_callback+0x48/0x1a4 [ 23.139974] rpm_callback+0x74/0x80 [ 23.139987] rpm_resume+0x3b0/0x698 [ 23.140000] __pm_runtime_resume+0x48/0x88 [ 23.140012] omap8250_set_mctrl+0x2c/0xbc [ 23.140030] serial8250_set_mctrl+0x20/0x40 [ 23.140046] uart_update_mctrl+0x80/0x110 [ 23.140062] uart_dtr_rts+0x104/0x118 [ 23.140079] tty_port_shutdown+0xd4/0xe0 [ 23.140092] tty_port_close+0x3c/0xb8 [ 23.140103] uart_close+0x34/0x98 [ 23.140116] ttyport_close+0x50/0xa0 [ 23.140137] serdev_device_close+0x40/0x5c [ 23.140150] btnxpuart_close+0x1c/0xa0 [btnxpuart] [ 23.140175] hci_dev_close_sync+0x304/0x7cc [bluetooth] [ 23.140243] hci_dev_do_close+0x2c/0x70 [bluetooth] [ 23.140309] hci_power_off+0x20/0x64 [bluetooth] [ 23.140379] process_one_work+0x148/0x284 [ 23.140403] worker_thread+0x2c8/0x3dc [ 23.140414] kthread+0x12c/0x208 [ 23.140426] ret_from_fork+0x10/0x20 Francesco