[PATCH 5.15 015/177] iio: imu: inv_icm42600: Fix I2C init possible nack

[Greg Kroah-Hartman]

From: Fawzi Khaber <fawzi.khaber@xxxxxxx>

commit b5d6ba09b10d2ccb865ed9bc45941db0a41c6756 upstream.

This register write to REG_INTF_CONFIG6 enables a spike filter that
is impacting the line and can prevent the I2C ACK to be seen by the
controller. So we don't test the return value.

Fixes: 7297ef1e261672b8 ("iio: imu: inv_icm42600: add I2C driver")
Signed-off-by: Fawzi Khaber <fawzi.khaber@xxxxxxx>
Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@xxxxxxx>
Link: https://lore.kernel.org/r/20220411111533.5826-1-jmaneyrol@xxxxxxxxxxxxxx
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c |   15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_i2c.c
@@ -18,12 +18,15 @@ static int inv_icm42600_i2c_bus_setup(st
 	unsigned int mask, val;
 	int ret;
 
-	/* setup interface registers */
-	ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG6,
-				 INV_ICM42600_INTF_CONFIG6_MASK,
-				 INV_ICM42600_INTF_CONFIG6_I3C_EN);
-	if (ret)
-		return ret;
+	/*
+	 * setup interface registers
+	 * This register write to REG_INTF_CONFIG6 enables a spike filter that
+	 * is impacting the line and can prevent the I2C ACK to be seen by the
+	 * controller. So we don't test the return value.
+	 */
+	regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG6,
+			   INV_ICM42600_INTF_CONFIG6_MASK,
+			   INV_ICM42600_INTF_CONFIG6_I3C_EN);
 
 	ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG4,
 				 INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY, 0);