linux-kernel - [PATCH v3 5/6] iio: light: stk3310: log error if reading the chip id fails

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Message-ID: <20241028142000.1058149-6-aren@peacevolution.org>
Date: Mon, 28 Oct 2024 10:19:59 -0400
From: Aren Moynihan <aren@...cevolution.org>
To: Jonathan Cameron <jic23@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Samuel Holland <samuel@...lland.org>
Cc: Aren Moynihan <aren@...cevolution.org>,
	Kaustabh Chakraborty <kauschluss@...root.org>,
	Barnabás Czémán <trabarni@...il.com>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Ondrej Jirman <megi@....cz>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	linux-iio@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-sunxi@...ts.linux.dev,
	Dragan Simic <dsimic@...jaro.org>,
	phone-devel@...r.kernel.org
Subject: [PATCH v3 5/6] iio: light: stk3310: log error if reading the chip id fails

If the chip isn't powered, this call is likely to return an error.
Without a log here the driver will silently fail to probe. Common errors
are ENXIO (when the chip isn't powered) and ETIMEDOUT (when the i2c bus
isn't powered).

Signed-off-by: Aren Moynihan <aren@...cevolution.org>
---

Notes:
    Changes in v2:
     - use dev_err_probe

 drivers/iio/light/stk3310.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
index 968a2cc59d09..d314659e7dc2 100644
--- a/drivers/iio/light/stk3310.c
+++ b/drivers/iio/light/stk3310.c
@@ -508,7 +508,7 @@ static int stk3310_init(struct iio_dev *indio_dev)
 
 	ret = regmap_read(data->regmap, STK3310_REG_ID, &chipid);
 	if (ret < 0)
-		return ret;
+		return dev_err_probe(&client->dev, ret, "failed to read chip id\n");
 
 	ret = stk3310_check_chip_id(chipid);
 	if (ret < 0)
-- 
2.47.0