linux-kernel - [PATCH 2/3] IIO: st_sensors_i2c.c: Don't print error on failed ACPI match

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Message-Id: <cd02d632857c0c1e351c86cfe58af023d75c6e86.1530268235.git.nikolaus.voss@loewensteinmedical.de>
Date:   Fri, 29 Jun 2018 10:19:58 +0200
From:   Nikolaus Voss <nikolaus.voss@...wensteinmedical.de>
To:     Jonathan Cameron <jic23@...nel.org>,
        Hartmut Knaack <knaack.h@....de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Lorenzo Bianconi <lorenzo.bianconi83@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Xiongfeng Wang <xiongfeng.wang@...aro.org>
Cc:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] IIO: st_sensors_i2c.c: Don't print error on failed ACPI
 match

If there is a ACPI node for a i2c device but HID/CID doesn't match, there
could still be a ACPI_DT_NAMESPACE_HID / PRP0001 HID entry which is
matched against the i2c device ID table, so don't print an error
message.

Signed-off-by: Nikolaus Voss <nikolaus.voss@...wensteinmedical.de>
---
 drivers/iio/common/st_sensors/st_sensors_i2c.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/common/st_sensors/st_sensors_i2c.c b/drivers/iio/common/st_sensors/st_sensors_i2c.c
index b81e48e9f27e..0c1a77f9b08c 100644
--- a/drivers/iio/common/st_sensors/st_sensors_i2c.c
+++ b/drivers/iio/common/st_sensors/st_sensors_i2c.c
@@ -87,10 +87,9 @@ int st_sensors_match_acpi_device(struct device *dev)
 
 	if (ACPI_HANDLE(dev)) {
 		acpi_id = acpi_match_device(dev->driver->acpi_match_table, dev);
-		if (!acpi_id) {
-			dev_err(dev, "No driver data\n");
+		if (!acpi_id)
 			return -EINVAL;
-		}
+
 		driver_data = acpi_id->driver_data;
 	}
 	return driver_data;
-- 
2.17.1