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Thu, 23 Jul 2026 19:58:10 -0700 (PDT) Received: from t-rex ([2401:4900:7b1c:a30e:8622:dbfc:dd30:d90d]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-13d130a7738sm21145440c88.9.2026.07.23.19.58.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 Jul 2026 19:58:10 -0700 (PDT) From: kr494167@gmail.com To: azpijr@gmail.com, jic23@kernel.org Cc: dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Surendra Singh Chouhan Subject: [PATCH] iio: light: apds9999: register standby action after enabling device Date: Fri, 24 Jul 2026 08:28:02 +0530 Message-ID: <20260724025802.13499-1-kr494167@gmail.com> X-Mailer: git-send-email 2.55.0 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" From: Surendra Singh Chouhan apds9999_init() called devm_add_action_or_reset() at the start of the function, before register configuration and before enabling the device via APDS9999_MAIN_CTRL_LS_EN. If register initialization failed during apds9999_init() (e.g. SMBus write failures on LS_MEAS_RATE or LS_GAIN), devm_add_action_or_reset() immediately triggered apds9999_standby(), writing to the control register on a device that failed initialization and was never enabled. Fix this by registering devm_add_action_or_reset() only after APDS9999_MAIN_CTRL_LS_EN is successfully written to the control register. Fixes: 5f9363e52300 ("iio: light: add support for APDS9999 sensor") Signed-off-by: Surendra Singh Chouhan --- drivers/iio/light/apds9999.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/iio/light/apds9999.c b/drivers/iio/light/apds9999.c index 43fa9992c9c2..62620c4a2fbc 100644 --- a/drivers/iio/light/apds9999.c +++ b/drivers/iio/light/apds9999.c @@ -100,10 +100,6 @@ static int apds9999_init(struct apds9999_data *data) u8 regval; int ret; =20 - ret =3D devm_add_action_or_reset(dev, apds9999_standby, client); - if (ret) - return ret; - guard(mutex)(&data->lock); =20 regval =3D FIELD_PREP(APDS9999_LS_RES_MASK, APDS9999_RES_18BIT) | @@ -121,8 +117,12 @@ static int apds9999_init(struct apds9999_data *data) return ret; data->als_gain_idx =3D APDS9999_GAIN_3X; =20 - return i2c_smbus_write_byte_data(client, APDS9999_REG_MAIN_CTRL, - APDS9999_MAIN_CTRL_LS_EN); + ret =3D i2c_smbus_write_byte_data(client, APDS9999_REG_MAIN_CTRL, + APDS9999_MAIN_CTRL_LS_EN); + if (ret) + return ret; + + return devm_add_action_or_reset(dev, apds9999_standby, client); } =20 static int apds9999_read_channel(struct apds9999_data *data, u8 reg, --=20 2.55.0