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a=VwQbUJbxAAAA:8 a=4rKMkRhNZKWQXe6QfQcA:9 a=wPNLvfGTeEIA:10 a=cAcMbU7R10T-QSRYIcO_:22 X-Proofpoint-GUID: qc34_V7ArFAOU-CiQnwViOOQT-hEKMNF X-HPE-SCL: -1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-22_07,2026-03-20_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 bulkscore=0 suspectscore=0 malwarescore=0 lowpriorityscore=0 adultscore=0 impostorscore=0 phishscore=0 clxscore=1015 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603230001 Content-Type: text/plain; charset="utf-8" From: Sanman Pradhan The hwmon sysfs ABI expects tempN_crit_hyst to report the temperature at which the critical condition clears, not the hysteresis delta from the critical limit. The peci cputemp driver currently returns tjmax - tcontrol for crit_hyst_type, which is the hysteresis margin rather than the corresponding absolute temperature. Return tcontrol directly, and update the documentation accordingly. Fixes: bf3608f338e9 ("hwmon: peci: Add cputemp driver") Cc: stable@vger.kernel.org Signed-off-by: Sanman Pradhan --- Documentation/hwmon/peci-cputemp.rst | 10 ++++++---- drivers/hwmon/peci/cputemp.c | 2 +- 2 files changed, 7 insertions(+), 5 deletions(-) diff --git a/Documentation/hwmon/peci-cputemp.rst b/Documentation/hwmon/pec= i-cputemp.rst index fe0422248dc5e..266b62a46f49c 100644 --- a/Documentation/hwmon/peci-cputemp.rst +++ b/Documentation/hwmon/peci-cputemp.rst @@ -51,8 +51,9 @@ temp1_max Provides thermal control temperature of the CP= U package temp1_crit Provides shutdown temperature of the CPU package which is also known as the maximum processor junction temperature, Tjmax or Tprochot. -temp1_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of - the CPU package. +temp1_crit_hyst Provides the hysteresis temperature of the CPU + package. Returns Tcontrol, the temperature at which + the critical condition clears. =20 temp2_label "DTS" temp2_input Provides current temperature of the CPU package scaled @@ -62,8 +63,9 @@ temp2_max Provides thermal control temperature of the CP= U package temp2_crit Provides shutdown temperature of the CPU package which is also known as the maximum processor junction temperature, Tjmax or Tprochot. -temp2_crit_hyst Provides the hysteresis value from Tcontrol to Tjmax of - the CPU package. +temp2_crit_hyst Provides the hysteresis temperature of the CPU + package. Returns Tcontrol, the temperature at which + the critical condition clears. =20 temp3_label "Tcontrol" temp3_input Provides current Tcontrol temperature of the CPU diff --git a/drivers/hwmon/peci/cputemp.c b/drivers/hwmon/peci/cputemp.c index b2fc936851e14..badec53ff4461 100644 --- a/drivers/hwmon/peci/cputemp.c +++ b/drivers/hwmon/peci/cputemp.c @@ -131,7 +131,7 @@ static int get_temp_target(struct peci_cputemp *priv, e= num peci_temp_target_type *val =3D priv->temp.target.tjmax; break; case crit_hyst_type: - *val =3D priv->temp.target.tjmax - priv->temp.target.tcontrol; + *val =3D priv->temp.target.tcontrol; break; default: ret =3D -EOPNOTSUPP; --=20 2.34.1 From nobody Fri Apr 3 22:14:39 2026 Received: from mx0b-002e3701.pphosted.com (mx0b-002e3701.pphosted.com [148.163.143.35]) (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 0681519D092; Mon, 23 Mar 2026 00:24:56 +0000 (UTC) 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a=k7r4yCLl9DVLXMiQTbtC:22 a=OUXY8nFuAAAA:8 a=VwQbUJbxAAAA:8 a=4WRzc9QnOF0kFBEKHOcA:9 a=wPNLvfGTeEIA:10 a=cAcMbU7R10T-QSRYIcO_:22 X-HPE-SCL: -1 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-22_07,2026-03-20_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 bulkscore=0 impostorscore=0 malwarescore=0 phishscore=0 spamscore=0 priorityscore=1501 suspectscore=0 lowpriorityscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603230001 Content-Type: text/plain; charset="utf-8" From: Sanman Pradhan cputemp_is_visible() validates the channel index against CPUTEMP_CHANNEL_NUMS, but currently uses '>' instead of '>=3D'. As a result, channel =3D=3D CPUTEMP_CHANNEL_NUMS is not rejected even though valid indices are 0 .. CPUTEMP_CHANNEL_NUMS - 1. Fix the bounds check by using '>=3D' so invalid channel indices are rejected before indexing the core bitmap. Fixes: bf3608f338e9 ("hwmon: peci: Add cputemp driver") Cc: stable@vger.kernel.org Signed-off-by: Sanman Pradhan --- drivers/hwmon/peci/cputemp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwmon/peci/cputemp.c b/drivers/hwmon/peci/cputemp.c index badec53ff4461..457089c561b40 100644 --- a/drivers/hwmon/peci/cputemp.c +++ b/drivers/hwmon/peci/cputemp.c @@ -319,7 +319,7 @@ static umode_t cputemp_is_visible(const void *data, enu= m hwmon_sensor_types type { const struct peci_cputemp *priv =3D data; =20 - if (channel > CPUTEMP_CHANNEL_NUMS) + if (channel >=3D CPUTEMP_CHANNEL_NUMS) return 0; =20 if (channel < channel_core) --=20 2.34.1