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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 35396EB64DB for ; Mon, 19 Jun 2023 11:00:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231646AbjFSLAP (ORCPT ); Mon, 19 Jun 2023 07:00:15 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60518 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232384AbjFSK7Q (ORCPT ); Mon, 19 Jun 2023 06:59:16 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 253162696 for ; Mon, 19 Jun 2023 03:58:19 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id A6F6B60B7F for ; Mon, 19 Jun 2023 10:58:18 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5B867C433C9; Mon, 19 Jun 2023 10:58:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687172297; bh=xj1Mg+98dZMC3hR/bcfPjPkwhrZbAyWNp9dtAzvdzHM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XO7viEJ8ZybIcRe0D7UqSqss11efHh+PL5ibhsW1yWX28AGnb/obOHte5YbsfinCx r2pn1umgBV3AnY79Q/eFNySWIgT+R/9kiCPNFkSSbX7GNEkn/RXL5g1mMMYuAKWgzD c3bkWHFHgG8Zs5WV9UUU4xNRG1XTIjHUnQYePhRs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Evan Quan , Lijo Lazar , Mario Limonciello , Sebastian Reichel , Sasha Levin Subject: [PATCH 5.15 018/107] power: supply: Fix logic checking if system is running from battery Date: Mon, 19 Jun 2023 12:30:02 +0200 Message-ID: <20230619102142.400609797@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230619102141.541044823@linuxfoundation.org> References: <20230619102141.541044823@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Mario Limonciello [ Upstream commit 95339f40a8b652b5b1773def31e63fc53c26378a ] The logic used for power_supply_is_system_supplied() counts all power supplies and assumes that the system is running from AC if there is either a non-battery power-supply reporting to be online or if no power-supplies exist at all. The second rule is for desktop systems, that don't have any battery/charger devices. These systems will incorrectly report to be powered from battery once a device scope power-supply is registered (e.g. a HID device), since these power-supplies increase the counter. Apart from HID devices, recent dGPUs provide UCSI power supplies on a desktop systems. The dGPU by default doesn't have anything plugged in so it's 'offline'. This makes power_supply_is_system_supplied() return 0 with a count of 1 meaning all drivers that use this get a wrong judgement. To fix this case adjust the logic to also examine the scope of the power supply. If the power supply is deemed a device power supply, then don't count it. Cc: Evan Quan Suggested-by: Lijo Lazar Signed-off-by: Mario Limonciello Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin --- drivers/power/supply/power_supply_core.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c index daf76d7885c05..8b2cd63016160 100644 --- a/drivers/power/supply/power_supply_core.c +++ b/drivers/power/supply/power_supply_core.c @@ -347,6 +347,10 @@ static int __power_supply_is_system_supplied(struct device *dev, void *data) struct power_supply *psy = dev_get_drvdata(dev); unsigned int *count = data; + if (!psy->desc->get_property(psy, POWER_SUPPLY_PROP_SCOPE, &ret)) + if (ret.intval == POWER_SUPPLY_SCOPE_DEVICE) + return 0; + (*count)++; if (psy->desc->type != POWER_SUPPLY_TYPE_BATTERY) if (!psy->desc->get_property(psy, POWER_SUPPLY_PROP_ONLINE, @@ -365,8 +369,8 @@ int power_supply_is_system_supplied(void) __power_supply_is_system_supplied); /* - * If no power class device was found at all, most probably we are - * running on a desktop system, so assume we are on mains power. + * If no system scope power class device was found at all, most probably we + * are running on a desktop system, so assume we are on mains power. */ if (count == 0) return 1; -- 2.39.2