From c925fccc4f8fae4354d98b2af606bd4747d3738d Mon Sep 17 00:00:00 2001 From: Sanman Pradhan Date: Tue, 17 Mar 2026 17:36:53 +0000 Subject: [PATCH] hwmon: (pmbus/hac300s) Add error check for pmbus_read_word_data() return value hac300s_read_word_data() passes the return value of pmbus_read_word_data() directly to FIELD_GET() without checking for errors. If the I2C transaction fails, a negative error code is sign-extended and passed to FIELD_GET(), which silently produces garbage data instead of propagating the error. Add the missing error check before using the return value in the FIELD_GET() macro. Fixes: 669cf162f7a1 ("hwmon: Add support for HiTRON HAC300S PSU") Cc: stable@vger.kernel.org Signed-off-by: Sanman Pradhan Link: https://lore.kernel.org/r/20260317173308.382545-2-sanman.pradhan@hpe.com Signed-off-by: Guenter Roeck --- drivers/hwmon/pmbus/hac300s.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hwmon/pmbus/hac300s.c b/drivers/hwmon/pmbus/hac300s.c index 0a1d52cae91e..a073db1cfe2e 100644 --- a/drivers/hwmon/pmbus/hac300s.c +++ b/drivers/hwmon/pmbus/hac300s.c @@ -58,6 +58,8 @@ static int hac300s_read_word_data(struct i2c_client *client, int page, case PMBUS_MFR_VOUT_MIN: case PMBUS_READ_VOUT: rv = pmbus_read_word_data(client, page, phase, reg); + if (rv < 0) + return rv; return FIELD_GET(LINEAR11_MANTISSA_MASK, rv); default: return -ENODATA;