From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m16.mail.163.com (m16.mail.163.com [220.197.31.3]) (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 5DAE71A680E; Wed, 1 Jul 2026 01:21:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.3 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782868896; cv=none; b=ImDCG6djaBFcs/4tzpp2m0cwUOq3JH9xS/xnfZp9+fHkcCk707pLI0ZefQPEQwVu11JUc9qzTxFOMB0qREJ/McBh6igKG9d5Hdvz704QhQsCvTR48U+uDwRO+IR8Fsm+Gl9bRmtSF1crLieSPnF5Ibr9uM/W5bBDrr3GYg37B6I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782868896; c=relaxed/simple; bh=GoIit5ZgJzeUoYLJLQLtF2uIv4TnqktuvxGLsgKQkXg=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=iDu5yRceTdZpuljC+NWNJaHXcwoA2rFGY1sOnIJ6Om1oed0vIrle+xnxf+AuTqJ00BHgTVDIH73c4RdIFL6ar7OJSUgL8Ymwlm5B2vfFFQmw2nTadfsemVmalWLkY97BmR4kmBd5yup/zn2RS/CJq7pIhMQ//PxvfnAjwcZOTf8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b=nA9Zdzl7; arc=none smtp.client-ip=220.197.31.3 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="nA9Zdzl7" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=JU uIzGBuENJNFR6jnDgMY03QkRKxghPv/IrsQ6dbhz8=; b=nA9Zdzl70usVkpmdgL 64vmy8ZRT+VwuoWW20AQo530WB49LPGF08C0P/XAOH5iNyD54jLMdPHQLa6JquuP VyOSpSyaOiKzaNnel4JiZ2+htEDJYCHOUkFRyvYL/3ITjco7TNiRQFfo+TD7YbPC sRr3IL6lei79hDC9P9m8IoBhQ= Received: from QD202103290168A.neusoft.internal (unknown []) by gzga-smtp-mtada-g0-2 (Coremail) with SMTP id _____wC3RIlua0RqTmAZGw--.57415S2; Wed, 01 Jul 2026 09:20:48 +0800 (CST) From: "jianing.li" To: Sebastian Reichel Cc: Iskren Chernev , Krzysztof Kozlowski , Marek Szyprowski , Matheus Castello , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, "jianing . li" , stable@vger.kernel.org Subject: [PATCH] power: supply: max17040: handle missing status supplier Date: Wed, 1 Jul 2026 09:20:45 +0800 Message-Id: <20260701012045.731-1-m13940358460@163.com> X-Mailer: git-send-email 2.23.0.windows.1 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:_____wC3RIlua0RqTmAZGw--.57415S2 X-Coremail-Antispam: 1Uf129KBjvJXoW7KF48JFy8Gw45uw43XrWkWFg_yoW8Ww17pa 90krn8Gw18ta4UC34DJa12k345Gw4jyrWUCrnrC39av3W3Xr4vkw1Utr1aqrykJryrZF4x KrZaka1fGr43Gr7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x0piY9aPUUUUU= X-CM-SenderInfo: jprtmkaqtvmkiwq6il2tof0z/xtbC3xCi3GpEa3A4cAAA3M MAX17040 does not report charger state itself, so the driver forwards POWER_SUPPLY_PROP_STATUS to a supplier power supply. If no supplier is registered, power_supply_get_property_from_supplier() returns -ENODEV and leaves the output value untouched. max17040_get_property() currently ignores that error and returns success, so userspace can read an uninitialized status value from the battery power supply. This happens on systems that use the fuel gauge without a charger supplier relationship in firmware. Return POWER_SUPPLY_STATUS_UNKNOWN when no supplier provides STATUS, and propagate other supplier lookup errors. Fixes: f4b782af61ae ("power: max17040: pass status property from supplier") Cc: stable@vger.kernel.org # 6.7+ Signed-off-by: jianing.li --- drivers/power/supply/max17040_battery.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c index 60c38e822b52..bba6d91c9b9b 100644 --- a/drivers/power/supply/max17040_battery.c +++ b/drivers/power/supply/max17040_battery.c @@ -405,7 +405,11 @@ static int max17040_get_property(struct power_supply *psy, val->intval = chip->low_soc_alert; break; case POWER_SUPPLY_PROP_STATUS: - power_supply_get_property_from_supplier(psy, psp, val); + ret = power_supply_get_property_from_supplier(psy, psp, val); + if (ret == -ENODEV) + val->intval = POWER_SUPPLY_STATUS_UNKNOWN; + else if (ret) + return ret; break; case POWER_SUPPLY_PROP_TEMP: if (!chip->channel_temp) -- 2.39.0