From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794047424; b=5oZM1Ue+uTwGLpirqq2e4Uf1m/J1tWTt+pCS2s2LdS0j22JElMavn4P89DwyrBLKdrkb 6/61coqbMPtLAv5VcsirehnRDtrl/3VjFOm4rOjGEsGRH1vcbhYVQnh/WPVSRrIxKfS3R i7VucssayIQ6WHp4viH/s4qYajUVJzyWoeIiDT9oj41bu/1at76Dsve1f6IECD+730AAf fh/S5w2LtOv1eEBm9WsPc8CbpKMvJZBKuOfyKMpHUvLgaY3fUuEgPmzyddy2QeLb2JJN1 h7+qAeIez2ruEgb1SvwfUtDBYpHo7DRAPjc+hIrruhP1G0h9QSCxS4T7P5F7stBL8CQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794047424; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: MIME-Version:Content-Type:Content-Transfer-Encoding; bh=43SZfXDD65hq+IQoLgt3VSFF1E5Ofhl8S4tIfTECbwY=; b=sbbxE6Svb9aFHdK1WLPsxFy9Kl/zKZ1nbjtUp2o9QxQTusk11I1MHUrr6h3OT6/AS9kU u9ihKVoGQBxbtWlNOLXff9n/X6EuzQf+ctNw3r7x0GQ/4bTbGLyDbTQ3oNY9eCyeEWmfJ nBU78jxufm0zZyHge8kE6enPoHbrmK7PcqdHGZDx+Pg3BXJe7l/0W1NLf888LA49eE3RD kIQV942Nn7uJwJ2+YRUsJaC/fQYZCPdrYttulHrBNzbAWmWZRbmoxaio0erbwa6Zy4iBU vOpCFWouI0pkgzb6u6nAdJFEp27fEiKEWBs02sZ8umZNGcqe/LD7P3oy1T0Zqy2bNJA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=d7R+oemq; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5FA35606A32F for ; Sat, 7 Nov 2026 10:30:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=d7R+oemq Received: by smtp.kernel.org (Postfix) with ESMTPSA id CE3081F008A1; Sat, 7 Nov 2026 10:30:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794047424; bh=43SZfXDD65hq+IQoLgt3VSFF1E5Ofhl8S4tIfTECbwY=; h=From:To:Cc:Subject:Date; b=d7R+oemq7rwVdskGk+DnRHXVEYhm6Txjl5pHTlUC8oYclKmu6RMt26fsBh2lzl6p7 +auK4mQbOOjz36w4TI6240MCfDxnNfnA9RV+i945ZmlU9fETTvpqRDdmO2S1t+l6hm 68jF2Di5c79YRVRDHE8b484IKfv+hHFpRJ48s5+4eVVqPxdNtP6iPExPvpVyuhMC6w v/OD0AAbnLOwCNJ+EpD34GLTTFtRNL94hxL6DVXCjtQpcyvR9ZSsG9vKbB9vgOa+32 YwwRS/V0nW5+qzbbhsw+uUKKtyJSvSXmcwMrSGrCN0Y+cPnlJjxKb0MU0gvgEJNt0j j9Nn0ykz9ZU0A== From: Sasha Levin To: tom.verdonck@inspiral.be, linux@roeck-us.net Cc: stable@vger.kernel.org Subject: FAILED: patch "[PATCH] hwmon: (tmp102) Fix jiffies wraparound in conversion-ready check" failed to apply to 6.6-stable tree Date: Sat, 7 Nov 2026 05:30:22 -0500 Message-ID: <20261107053022-failed-6.6-56c1d32323e7@kernel.org> X-Mailer: git-send-email 2.53.0 X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The patch below does not apply to the 6.6-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.6.y git checkout FETCH_HEAD git cherry-pick -x 56c1d32323e773b8b927316f8beeae9238576335 # git commit -s git send-email --to '' --in-reply-to '20261107053022-failed-6.6-56c1d32323e7@kernel.org' --subject-prefix 'PATCH 6.6.y' 'HEAD^..' Thanks, Sasha ------------------ original commit in Linus's tree ------------------ >From 56c1d32323e773b8b927316f8beeae9238576335 Mon Sep 17 00:00:00 2001 From: Tom Verdonck Date: Fri, 25 Sep 2026 20:23:22 +0200 Subject: [PATCH] hwmon: (tmp102) Fix jiffies wraparound in conversion-ready check tmp102 records a one-shot deadline in ->ready_time at probe (and resume) and, on every temperature read, refuses the read with -EAGAIN while time_before(jiffies, ready_time) is true, in order to skip the first ~35 ms conversion. ->ready_time is an unsigned long compared with time_before(), whose signed difference is only meaningful while the two values are within LONG_MAX jiffies of each other. Because ->ready_time is set once and never refreshed, jiffies keeps advancing away from it, and after 2^31 jiffies the difference flips sign. On a 32-bit HZ=100 kernel that happens ~248.5 days after boot: time_before() then permanently reports "not ready" and the driver returns -EAGAIN on every read, without ever touching the sensor, until the next reboot. Store the deadline as a 64-bit jiffies value and compare it with get_jiffies_64()/time_before64(), which does not wrap in any practical uptime. Fixes: 3d8f7a89a197 ("hwmon: (tmp102) Improve handling of initial read delay") Cc: stable@vger.kernel.org Signed-off-by: Tom Verdonck Link: https://patch.msgid.link/2952f070f82913aea96eec25d28008d3b9058656.1790358356.git.tom.verdonck@inspiral.be Signed-off-by: Guenter Roeck --- drivers/hwmon/tmp102.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/hwmon/tmp102.c b/drivers/hwmon/tmp102.c index 50a8b050d8da1..8c8463ddb6c45 100644 --- a/drivers/hwmon/tmp102.c +++ b/drivers/hwmon/tmp102.c @@ -58,7 +58,7 @@ struct tmp102 { const char *label; struct regmap *regmap; u16 config_orig; - unsigned long ready_time; + u64 ready_time; u16 sample_time; }; @@ -106,7 +106,7 @@ static int tmp102_read_temp(struct device *dev, u32 attr, long *val) switch (attr) { case hwmon_temp_input: /* Is it too early to return a conversion ? */ - if (time_before(jiffies, tmp102->ready_time)) { + if (time_before64(get_jiffies_64(), tmp102->ready_time)) { dev_dbg(dev, "%s: Conversion not ready yet..\n", __func__); return -EAGAIN; } @@ -354,7 +354,7 @@ static int tmp102_probe(struct i2c_client *client) * Mark that we are not ready with data until the first * conversion is complete */ - tmp102->ready_time = jiffies + msecs_to_jiffies(CONVERSION_TIME_MS); + tmp102->ready_time = get_jiffies_64() + msecs_to_jiffies(CONVERSION_TIME_MS); hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, tmp102, @@ -387,7 +387,7 @@ static int tmp102_resume(struct device *dev) err = regmap_update_bits(tmp102->regmap, TMP102_CONF_REG, TMP102_CONF_SD, 0); - tmp102->ready_time = jiffies + msecs_to_jiffies(CONVERSION_TIME_MS); + tmp102->ready_time = get_jiffies_64() + msecs_to_jiffies(CONVERSION_TIME_MS); return err; } -- 2.53.0