From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2BCC7C76195 for ; Mon, 15 Jul 2019 14:56:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 03439205ED for ; Mon, 15 Jul 2019 14:56:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563202582; bh=LBDzCVY8HeNMIDTuOgFyeBzeRIpGKi2pUXXNPXffh6s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Uo7oHsABY0YTG34FVTLVDLfbyAA2Wtyx6Qj//3OcpAPJ89aPIltE0xdpMfrjBmf2w D8b+C5Qrm+eURZ1WFVuXry+jCyH/g2RbrltYjhnYEbEwr9b4koZ88eMa7FwSFjpR5w xXmaXSElEeoLWkCV+rUcCJEJLnhhazgjjZ5/av+M= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390445AbfGOOXE (ORCPT ); Mon, 15 Jul 2019 10:23:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:52792 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390039AbfGOOXE (ORCPT ); Mon, 15 Jul 2019 10:23:04 -0400 Received: from sasha-vm.mshome.net (unknown [73.61.17.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5F55521537; Mon, 15 Jul 2019 14:23:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563200583; bh=LBDzCVY8HeNMIDTuOgFyeBzeRIpGKi2pUXXNPXffh6s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2mtRQ2+E/vtJ4kl3QAnGgbXYElshQ+yyGEPCvTcD1WkcjmMbKuf4U9rLAXU5d1Pln QuMya2xekS13y4h7co9r+FWhbPVZkcnR7Yq/MlFtQXbOf2cdjBzAC8TSABmJvNxsoh g+PqjAHL6r+sQs7y9z8Ppc/ziGXQAEYlfTKqRWNs= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: "Rafael J. Wysocki" , Furquan Shaikh , Mika Westerberg , Sasha Levin , linux-acpi@vger.kernel.org, devel@acpica.org Subject: [PATCH AUTOSEL 4.19 083/158] ACPICA: Clear status of GPEs on first direct enable Date: Mon, 15 Jul 2019 10:16:54 -0400 Message-Id: <20190715141809.8445-83-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190715141809.8445-1-sashal@kernel.org> References: <20190715141809.8445-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: "Rafael J. Wysocki" [ Upstream commit 44758bafa53602f2581a6857bb20b55d4d8ad5b2 ] ACPI GPEs (other than the EC one) can be enabled in two situations. First, the GPEs with existing _Lxx and _Exx methods are enabled implicitly by ACPICA during system initialization. Second, the GPEs without these methods (like GPEs listed by _PRW objects for wakeup devices) need to be enabled directly by the code that is going to use them (e.g. ACPI power management or device drivers). In the former case, if the status of a given GPE is set to start with, its handler method (either _Lxx or _Exx) needs to be invoked to take care of the events (possibly) signaled before the GPE was enabled. In the latter case, however, the first caller of acpi_enable_gpe() for a given GPE should not be expected to care about any events that might be signaled through it earlier. In that case, it is better to clear the status of the GPE before enabling it, to prevent stale events from triggering unwanted actions (like spurious system resume, for example). For this reason, modify acpi_ev_add_gpe_reference() to take an additional boolean argument indicating whether or not the GPE status needs to be cleared when its reference counter changes from zero to one and make acpi_enable_gpe() pass TRUE to it through that new argument. Fixes: 18996f2db918 ("ACPICA: Events: Stop unconditionally clearing ACPI IRQs during suspend/resume") Reported-by: Furquan Shaikh Tested-by: Furquan Shaikh Tested-by: Mika Westerberg Signed-off-by: Rafael J. Wysocki Signed-off-by: Sasha Levin --- drivers/acpi/acpica/acevents.h | 3 ++- drivers/acpi/acpica/evgpe.c | 8 +++++++- drivers/acpi/acpica/evgpeblk.c | 2 +- drivers/acpi/acpica/evxface.c | 2 +- drivers/acpi/acpica/evxfgpe.c | 2 +- 5 files changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/acpi/acpica/acevents.h b/drivers/acpi/acpica/acevents.h index 704bebbd35b0..298180bf7e3c 100644 --- a/drivers/acpi/acpica/acevents.h +++ b/drivers/acpi/acpica/acevents.h @@ -69,7 +69,8 @@ acpi_status acpi_ev_mask_gpe(struct acpi_gpe_event_info *gpe_event_info, u8 is_masked); acpi_status -acpi_ev_add_gpe_reference(struct acpi_gpe_event_info *gpe_event_info); +acpi_ev_add_gpe_reference(struct acpi_gpe_event_info *gpe_event_info, + u8 clear_on_enable); acpi_status acpi_ev_remove_gpe_reference(struct acpi_gpe_event_info *gpe_event_info); diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c index e10fec99a182..4b5d3b4c627a 100644 --- a/drivers/acpi/acpica/evgpe.c +++ b/drivers/acpi/acpica/evgpe.c @@ -146,6 +146,7 @@ acpi_ev_mask_gpe(struct acpi_gpe_event_info *gpe_event_info, u8 is_masked) * FUNCTION: acpi_ev_add_gpe_reference * * PARAMETERS: gpe_event_info - Add a reference to this GPE + * clear_on_enable - Clear GPE status before enabling it * * RETURN: Status * @@ -155,7 +156,8 @@ acpi_ev_mask_gpe(struct acpi_gpe_event_info *gpe_event_info, u8 is_masked) ******************************************************************************/ acpi_status -acpi_ev_add_gpe_reference(struct acpi_gpe_event_info *gpe_event_info) +acpi_ev_add_gpe_reference(struct acpi_gpe_event_info *gpe_event_info, + u8 clear_on_enable) { acpi_status status = AE_OK; @@ -170,6 +172,10 @@ acpi_ev_add_gpe_reference(struct acpi_gpe_event_info *gpe_event_info) /* Enable on first reference */ + if (clear_on_enable) { + (void)acpi_hw_clear_gpe(gpe_event_info); + } + status = acpi_ev_update_gpe_enable_mask(gpe_event_info); if (ACPI_SUCCESS(status)) { status = acpi_ev_enable_gpe(gpe_event_info); diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c index b253063b09d3..8d96270ed8c7 100644 --- a/drivers/acpi/acpica/evgpeblk.c +++ b/drivers/acpi/acpica/evgpeblk.c @@ -453,7 +453,7 @@ acpi_ev_initialize_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, continue; } - status = acpi_ev_add_gpe_reference(gpe_event_info); + status = acpi_ev_add_gpe_reference(gpe_event_info, FALSE); if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "Could not enable GPE 0x%02X", diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c index febc332b00ac..841557bda641 100644 --- a/drivers/acpi/acpica/evxface.c +++ b/drivers/acpi/acpica/evxface.c @@ -971,7 +971,7 @@ acpi_remove_gpe_handler(acpi_handle gpe_device, ACPI_GPE_DISPATCH_METHOD) || (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) == ACPI_GPE_DISPATCH_NOTIFY)) && handler->originally_enabled) { - (void)acpi_ev_add_gpe_reference(gpe_event_info); + (void)acpi_ev_add_gpe_reference(gpe_event_info, FALSE); if (ACPI_GPE_IS_POLLING_NEEDED(gpe_event_info)) { /* Poll edge triggered GPEs to handle existing events */ diff --git a/drivers/acpi/acpica/evxfgpe.c b/drivers/acpi/acpica/evxfgpe.c index b2d5f66cc1b0..4188731e7c40 100644 --- a/drivers/acpi/acpica/evxfgpe.c +++ b/drivers/acpi/acpica/evxfgpe.c @@ -108,7 +108,7 @@ acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number) if (gpe_event_info) { if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) != ACPI_GPE_DISPATCH_NONE) { - status = acpi_ev_add_gpe_reference(gpe_event_info); + status = acpi_ev_add_gpe_reference(gpe_event_info, TRUE); if (ACPI_SUCCESS(status) && ACPI_GPE_IS_POLLING_NEEDED(gpe_event_info)) { -- 2.20.1