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Wed, 19 Aug 2026 11:07:29 -0700 (PDT) Received: from White.tail445f11.ts.net ([103.195.202.245]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-1416ad6060asm15598329c88.6.2026.08.19.11.07.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Aug 2026 11:07:28 -0700 (PDT) From: Nikhil Gurudasani To: Victor Duicu , Guenter Roeck Cc: linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] hwmon: (mcp9982) Propagate one-shot polling errors Date: Wed, 19 Aug 2026 23:37:01 +0530 Message-ID: <20260819180701.34797-1-nikhilgurudasani314@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" When a device is in standby, the driver starts a one-shot conversion and polls the BUSY flag before reading temperature, alarm, or fault data. The poll result is currently ignored. Therefore, a timeout or a status-register read failure can be hidden by a later successful read, causing stale data to be returned as valid. Return the polling error before reading the requested attribute. Fixes: e2fe950f34e5 ("hwmon: add support for MCP998X") Cc: stable@vger.kernel.org Signed-off-by: Nikhil Gurudasani --- drivers/hwmon/mcp9982.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hwmon/mcp9982.c b/drivers/hwmon/mcp9982.c index 9e19e2697e25..3918dc36c946 100644 --- a/drivers/hwmon/mcp9982.c +++ b/drivers/hwmon/mcp9982.c @@ -395,6 +395,8 @@ static int mcp9982_read(struct device *dev, enum hwmon_= sensor_types type, u32 at reg_status, !(reg_status & MCP9982_STATUS_BUSY), MCP9982_WAKE_UP_TIME_US, MCP9982_WAKE_UP_TIME_US * 10); + if (ret) + return ret; break; } break; base-commit: f7c9176d2326eacae3a87fa3f5214a78c818cc07 --=20 2.43.0