From patchwork Thu Jul 4 08:52:08 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Neil Armstrong X-Patchwork-Id: 13723443 Received: from mail-wm1-f41.google.com (mail-wm1-f41.google.com [209.85.128.41]) (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 848CA1AAE15 for ; Thu, 4 Jul 2024 08:52:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.41 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720083143; cv=none; b=btf/PXgwF6PI1MbIRW+kWOi0HSkJUtUdhP2JnLsCZ2QWbtKM75FF9QyP2jU7xt09pZ4nPUGAa8Y5zpKBIajGUak7FD9LImdvJCTMxvRMmEVH2btu+CSDtshlYpzExNIiS/lWbCBwJt7fi+T4dWmKCNXvqyBpBy5MsBeu7G4aaSY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720083143; c=relaxed/simple; bh=msMUHdwmfo/xfcbLPfmoqnDcJZxTp37M9X1aU/HHt64=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=RXSTrhLWRJuEAJAD2HIvVglovzZjzmaXHvI8iq5SNEJKKnllJrciufN9cls2+Bwm5tk+z1J3qkH2Y9rccWQ+y3aTAvDXRb5mZqPRhIm/BZpFQTn+aYHbi2oLGV8lIM+QO2kmBjjFNJwT5fwQCGEVEOKYXjTgseZdUg5j+FcOHq8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org; spf=pass smtp.mailfrom=linaro.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b=wTjRO2m6; arc=none smtp.client-ip=209.85.128.41 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linaro.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linaro.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="wTjRO2m6" Received: by mail-wm1-f41.google.com with SMTP id 5b1f17b1804b1-4256aee6e4dso2509695e9.1 for ; Thu, 04 Jul 2024 01:52:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1720083140; x=1720687940; darn=vger.kernel.org; h=cc:to:message-id:content-transfer-encoding:mime-version:subject :date:from:from:to:cc:subject:date:message-id:reply-to; bh=owtkn1JZViROHRyq0OPRHeVCIxCBljvpg/PQP6ulIbQ=; b=wTjRO2m6HT7SU/SJcir+JwmX9khT4JEBG8CqXQCeAury5jHUufSIC3VqtiLxVFhZ8M /Ol2WqhAJoOhbuMw2VgE7EkcbWU+cD1IjUTETFPrxRYvo3s3S4QS6ZKZrKN2k70Ixa5J 8ET13de0XYWMdSvvMpk3J7MVuMT8UgeNl3FCRPczXRdlQhsGVR0B/TPnV1HMRBVBK5Wa 4syTKjN/zwcngejdqqZpV3UMtv8hix7pt1mCnLLf3TXrJZqLVFn4TIsjNvrjHrwbioaK 9Rsh2gq3HVze2C94f/+MxnSYr9kI4OIzOa+EJQrjF5YPYxy9JUToDThZMRw6r74SJ72+ RAyA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720083140; x=1720687940; h=cc:to:message-id:content-transfer-encoding:mime-version:subject :date:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=owtkn1JZViROHRyq0OPRHeVCIxCBljvpg/PQP6ulIbQ=; b=ov5/pM2TcfQDy+CMTXh2acvXfghf1AmrBPnvXhx2zz4s7Q/22GXbMIIJYpe5sR+KwT RmvLFPX/3dskaSoZD2fnukXAJQgivC429r05KQ8PL1MnvsgbrDtUPQdIRXvAjCE+1xoh 3/h3/qzDVB3JLu3x5AGpo75xLhYGpAt9JC67DqF5DyTpiwLGPHd4V1VMYaSd7LIT2fyx hksmXUC5Kzl00Tep25ppe6R5vGTN7HiXxQqEwFw2JWk8aqhYlwcZlwbh7uiVG2rXXXM8 Q8GScDNLqtHOCTMQgBbgW4LI5XT5VIJMs8gVsHbVMdpp/NgEfPXetLOFwYITakhtRaym HbAw== X-Forwarded-Encrypted: i=1; AJvYcCWfhnSDFQAC8Cj1K2Hq0b56BD7ZpqTIUC3G3C26oNCi8VvVW6gWwmYlMnkGz68DLlrEteOaRjWSf0LMmMClrBUifrRg36ysv449O34ODQ== X-Gm-Message-State: AOJu0YzMM1v/8IVorLO8/LIH3BxTtxAoEzmXdAjE3UjN2MxxLZ8+tD6G eMNRm/NbNhXgzCKdEYDJc554d5t/v+JEu/v6U/XNA9UQ5GLDlfsN3IHNCDegR68= X-Google-Smtp-Source: AGHT+IEKfbZg35nXOhYy2lKG9e+Vhb3VIC97OxLgHXyJIZPolH1wsLGFTnb4R/XR/J0+8n9tMHcb1Q== X-Received: by 2002:a05:600c:6a99:b0:425:68a3:f6e0 with SMTP id 5b1f17b1804b1-4264a3d692cmr7479305e9.9.1720083139646; Thu, 04 Jul 2024 01:52:19 -0700 (PDT) Received: from arrakeen.starnux.net ([2a01:e0a:982:cbb0:52eb:f6ff:feb3:451a]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4264a1f23f9sm14773225e9.26.2024.07.04.01.52.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Jul 2024 01:52:19 -0700 (PDT) From: Neil Armstrong Date: Thu, 04 Jul 2024 10:52:08 +0200 Subject: [PATCH] power: supply: core: return -EAGAIN on uninitialized read temp Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240704-topic-sm8x50-upstream-fix-battmgr-temp-tz-warn-v1-1-9d66d6f6efde@linaro.org> X-B4-Tracking: v=1; b=H4sIALdihmYC/x2NQQqDMBAAvyJ77kIiNpF+pfQQ7ap7SAybtZWKf 2/wODDMHFBImAo8mgOEPlx4TRXsrYFxCWkm5HdlaE3bGW861DXziCX2+93glosKhYgT7zgE1Tg LKsWM+sNvkITGe+tc7yxNA9RoFqruNXy+zvMPK2zxZYAAAAA= To: Sebastian Reichel , Krzysztof Kozlowski , Rhyland Klein , Anton Vorontsov , Jenny TC Cc: Daniel Lezcano , "Rafael J. Wysocki" , linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, regressions@lists.linux.dev, Neil Armstrong X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2198; i=neil.armstrong@linaro.org; h=from:subject:message-id; bh=msMUHdwmfo/xfcbLPfmoqnDcJZxTp37M9X1aU/HHt64=; b=owEBbQKS/ZANAwAKAXfc29rIyEnRAcsmYgBmhmLC3GIAm/IY+flJvbi3VHvb6P9YrFTIq0uMMYEf VBSh9ySJAjMEAAEKAB0WIQQ9U8YmyFYF/h30LIt33NvayMhJ0QUCZoZiwgAKCRB33NvayMhJ0U1JD/ 9NO+kScylVLDMfeKXVFP+OUUlVeTPI9AZGbf4DxR5mqKt9zgrQngmQKMv53XR0PkQOHa+VliOslQvV vRazmjM5Sr72dd2yMPruHs9hvLCCNB63+W0yU7V13js59lgzuUnOAQs7o/zsqwMHxPPGbkYlmIFHqk e6kx+8WM50gNAI7DW1z223hpYE8ed8O9qGOXHIsoNIJHESwi5/6JG4BdwQNXBwm9IovnmMBVVn0Y4e pKS8mgFUjxeKuFvQUvXNDQhWmX4eS3vZ5IhJJQV/54hxCdgfQufaaHpuFfcQBxfFWRyA5MZxZewn6t DGWSqeeXgjeMu314yqJpA1QTPD8LyKrH+nhfhF0PLuYLpHKgxMhmGnqCpt6/AhQDgXhCvhEy6IuCK2 onrhCBv4pzj1d+8SGtkL8HHjlBAXaYcVphHtGrCbkRTWMcx98CRMQy8jWkDD7SVnuuV+OTZXPbdthB S2q6hfV63oB3XYgqk1jjGpn2/TMd2G5jR0q8QZhm8stzYHpQvnlfqDMwQYxeENL6kMm/Rptrj3nScF KA/79i3M97SGCKlS0lBAh7v918HYanXAKbYtdbW9R6DipWUodg6XMwjzt/XFll4+PmQB+XSrYvY78T Sz2sJ0qbQR69BYcNwe91BPT2wnE7qCpdCMHF24eJyr7ltLXsnlfztNsn7Tkw== X-Developer-Key: i=neil.armstrong@linaro.org; a=openpgp; fpr=89EC3D058446217450F22848169AB7B1A4CFF8AE If the thermal core tries to update the temperature from an uninitialized power supply, it will swawn the following warning: thermal thermal_zoneXX: failed to read out thermal zone (-19) But reading from an uninitialized power supply should not be considered as a fatal error, but the thermal core expects the -EAGAIN error to be returned in this particular case. So convert -ENODEV as -EAGAIN to express the fact that reading temperature from an uninitialized power supply shouldn't be a fatal error, but should indicate to the thermal zone it should retry later. It notably removes such messages on Qualcomm platforms using the qcom_battmgr driver spawning warnings until the aDSP firmware gets up and the battery manager reports valid data. Link: https://lore.kernel.org/all/2ed4c630-204a-4f80-a37f-f2ca838eb455@linaro.org/ Fixes: 5bc28b93a36e ("power_supply: power_supply_read_temp only if use_cnt > 0") Fixes: 3be330bf8860 ("power_supply: Register battery as a thermal zone") Signed-off-by: Neil Armstrong --- drivers/power/supply/power_supply_core.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) --- base-commit: 82e4255305c554b0bb18b7ccf2db86041b4c8b6e change-id: 20240704-topic-sm8x50-upstream-fix-battmgr-temp-tz-warn-077166861efb Best regards, diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c index 8f6025acd10a..b38bff4dbfc7 100644 --- a/drivers/power/supply/power_supply_core.c +++ b/drivers/power/supply/power_supply_core.c @@ -1287,8 +1287,13 @@ static int power_supply_read_temp(struct thermal_zone_device *tzd, WARN_ON(tzd == NULL); psy = thermal_zone_device_priv(tzd); ret = power_supply_get_property(psy, POWER_SUPPLY_PROP_TEMP, &val); + /* + * The thermal core expects -EAGAIN as non-fatal error, + * convert -ENODEV as -EAGAIN since -ENODEV is returned + * when a power supply device isn't initialized + */ if (ret) - return ret; + return ret == -ENODEV ? -EAGAIN : ret; /* Convert tenths of degree Celsius to milli degree Celsius. */ *temp = val.intval * 100;