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 AA393347CC; Wed, 5 Feb 2025 14:32:22 +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=1738765942; cv=none; b=EMHSvg15b45Z29Knj5+fahnIMvDK7lrHkBVsrcDHftEBrz7tx9uwYH2iI5EEFktHQ7/neROH9iUw5sLFWlciygluq0M9iF4aqdoTTDvuEqtiRpRd2rw3kY7N2Om5YIa7DUAZAcZ3H1ab+1/YGRm2H5ofQqgC8DbJ3u1g8xNkHt4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738765942; c=relaxed/simple; bh=UAuFK6gAkmRvNNJYki1VptUrm31kDgvRDqUVnv/SssU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=f1u7R/AjP1V447fmH9etaenLztiVEP5BYsLMvW7tK4RZcSUEpZ0bxxvmziG9jsDpBKzcdnO/TlkxRZua3ZxLafs5f8nTyho/XD0C/baxnp4Ka4CbqagiMTVkBGCuo/v9YLp72CkzDO+Z+V5Xcwnlykb2ZNJjJOt953GQtSyNJjs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=hJVn2pS1; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="hJVn2pS1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 15AA4C4CED1; Wed, 5 Feb 2025 14:32:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1738765942; bh=UAuFK6gAkmRvNNJYki1VptUrm31kDgvRDqUVnv/SssU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hJVn2pS184kBTagzaY6k7pEHp/3EG2+UgD0mOCMjjNEYbch2DrBJoHU8iJa5og00U RHq6g8MnEaI/TU3coE2ifF2uhWxb3tj+/SuQzWIhMYTYHD3Mid4H8d0g/cJYw5zdoA LH8r+1VXTxin2WIZOC9fRGkEfbb8JvDnxbr/h+BU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Qunqin Zhao , Huacai Chen , Sasha Levin Subject: [PATCH 6.6 314/393] LoongArch: Fix warnings during S3 suspend Date: Wed, 5 Feb 2025 14:43:53 +0100 Message-ID: <20250205134432.328355630@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250205134420.279368572@linuxfoundation.org> References: <20250205134420.279368572@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Huacai Chen [ Upstream commit 26c0a2d93af55d30a46d5f45d3e9c42cde730168 ] The enable_gpe_wakeup() function calls acpi_enable_all_wakeup_gpes(), and the later one may call the preempt_schedule_common() function, resulting in a thread switch and causing the CPU to be in an interrupt enabled state after the enable_gpe_wakeup() function returns, leading to the warnings as follow. [ C0] WARNING: ... at kernel/time/timekeeping.c:845 ktime_get+0xbc/0xc8 [ C0] ... [ C0] Call Trace: [ C0] [<90000000002243b4>] show_stack+0x64/0x188 [ C0] [<900000000164673c>] dump_stack_lvl+0x60/0x88 [ C0] [<90000000002687e4>] __warn+0x8c/0x148 [ C0] [<90000000015e9978>] report_bug+0x1c0/0x2b0 [ C0] [<90000000016478e4>] do_bp+0x204/0x3b8 [ C0] [<90000000025b1924>] exception_handlers+0x1924/0x10000 [ C0] [<9000000000343bbc>] ktime_get+0xbc/0xc8 [ C0] [<9000000000354c08>] tick_sched_timer+0x30/0xb0 [ C0] [<90000000003408e0>] __hrtimer_run_queues+0x160/0x378 [ C0] [<9000000000341f14>] hrtimer_interrupt+0x144/0x388 [ C0] [<9000000000228348>] constant_timer_interrupt+0x38/0x48 [ C0] [<90000000002feba4>] __handle_irq_event_percpu+0x64/0x1e8 [ C0] [<90000000002fed48>] handle_irq_event_percpu+0x20/0x80 [ C0] [<9000000000306b9c>] handle_percpu_irq+0x5c/0x98 [ C0] [<90000000002fd4a0>] generic_handle_domain_irq+0x30/0x48 [ C0] [<9000000000d0c7b0>] handle_cpu_irq+0x70/0xa8 [ C0] [<9000000001646b30>] handle_loongarch_irq+0x30/0x48 [ C0] [<9000000001646bc8>] do_vint+0x80/0xe0 [ C0] [<90000000002aea1c>] finish_task_switch.isra.0+0x8c/0x2a8 [ C0] [<900000000164e34c>] __schedule+0x314/0xa48 [ C0] [<900000000164ead8>] schedule+0x58/0xf0 [ C0] [<9000000000294a2c>] worker_thread+0x224/0x498 [ C0] [<900000000029d2f0>] kthread+0xf8/0x108 [ C0] [<9000000000221f28>] ret_from_kernel_thread+0xc/0xa4 [ C0] [ C0] ---[ end trace 0000000000000000 ]--- The root cause is acpi_enable_all_wakeup_gpes() uses a mutex to protect acpi_hw_enable_all_wakeup_gpes(), and acpi_ut_acquire_mutex() may cause a thread switch. Since there is no longer concurrent execution during loongarch_acpi_suspend(), we can call acpi_hw_enable_all_wakeup_gpes() directly in enable_gpe_wakeup(). The solution is similar to commit 22db06337f590d01 ("ACPI: sleep: Avoid breaking S3 wakeup due to might_sleep()"). Fixes: 366bb35a8e48 ("LoongArch: Add suspend (ACPI S3) support") Signed-off-by: Qunqin Zhao Signed-off-by: Huacai Chen Signed-off-by: Sasha Levin --- arch/loongarch/power/platform.c | 2 +- drivers/acpi/acpica/achware.h | 2 -- include/acpi/acpixf.h | 1 + 3 files changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/loongarch/power/platform.c b/arch/loongarch/power/platform.c index 3ea8e07aa225f..6c7735cda4d83 100644 --- a/arch/loongarch/power/platform.c +++ b/arch/loongarch/power/platform.c @@ -17,7 +17,7 @@ void enable_gpe_wakeup(void) if (acpi_gbl_reduced_hardware) return; - acpi_enable_all_wakeup_gpes(); + acpi_hw_enable_all_wakeup_gpes(); } void enable_pci_wakeup(void) diff --git a/drivers/acpi/acpica/achware.h b/drivers/acpi/acpica/achware.h index 79bbfe00d241f..b8543a34caead 100644 --- a/drivers/acpi/acpica/achware.h +++ b/drivers/acpi/acpica/achware.h @@ -103,8 +103,6 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info *gpe_event_info, acpi_status acpi_hw_enable_all_runtime_gpes(void); -acpi_status acpi_hw_enable_all_wakeup_gpes(void); - u8 acpi_hw_check_all_gpes(acpi_handle gpe_skip_device, u32 gpe_skip_number); acpi_status diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h index a3c9dd4a1ac33..7e9e7e7690436 100644 --- a/include/acpi/acpixf.h +++ b/include/acpi/acpixf.h @@ -763,6 +763,7 @@ ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status *event_status)) ACPI_HW_DEPENDENT_RETURN_UINT32(u32 acpi_dispatch_gpe(acpi_handle gpe_device, u32 gpe_number)) ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_hw_disable_all_gpes(void)) +ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_hw_enable_all_wakeup_gpes(void)) ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_disable_all_gpes(void)) ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_enable_all_runtime_gpes(void)) ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status acpi_enable_all_wakeup_gpes(void)) -- 2.39.5