linux-kernel - [PATCH] Input: bu21029_ts - Make use of the helper function dev_err

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Date:   Thu, 16 Sep 2021 23:31:40 +0800
From:   Cai Huoqing <caihuoqing@...du.com>
To:     <caihuoqing@...du.com>
CC:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        <linux-input@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] Input: bu21029_ts - Make use of the helper function dev_err_probe()

When possible use dev_err_probe help to properly deal with the
PROBE_DEFER error, the benefit is that DEFER issue will be logged
in the devices_deferred debugfs file.
Using dev_err_probe() can reduce code size, and the error value
gets printed.

Signed-off-by: Cai Huoqing <caihuoqing@...du.com>
---
 drivers/input/touchscreen/bu21029_ts.c | 28 +++++++++-----------------
 1 file changed, 9 insertions(+), 19 deletions(-)

diff --git a/drivers/input/touchscreen/bu21029_ts.c b/drivers/input/touchscreen/bu21029_ts.c
index 392950aa7856..dd4738761848 100644
--- a/drivers/input/touchscreen/bu21029_ts.c
+++ b/drivers/input/touchscreen/bu21029_ts.c
@@ -353,30 +353,20 @@ static int bu21029_probe(struct i2c_client *client,
 
 	error = device_property_read_u32(&client->dev, "rohm,x-plate-ohms",
 					 &bu21029->x_plate_ohms);
-	if (error) {
-		dev_err(&client->dev,
-			"invalid 'x-plate-ohms' supplied: %d\n", error);
-		return error;
-	}
+	if (error)
+		return dev_err_probe(&client->dev, error,
+				     "invalid 'x-plate-ohms' supplied\n");
 
 	bu21029->vdd = devm_regulator_get(&client->dev, "vdd");
-	if (IS_ERR(bu21029->vdd)) {
-		error = PTR_ERR(bu21029->vdd);
-		if (error != -EPROBE_DEFER)
-			dev_err(&client->dev,
-				"failed to acquire 'vdd' supply: %d\n", error);
-		return error;
-	}
+	if (IS_ERR(bu21029->vdd))
+		return dev_err_probe(&client->dev, PTR_ERR(bu21029->vdd),
+				     "failed to acquire 'vdd' supply\n");
 
 	bu21029->reset_gpios = devm_gpiod_get_optional(&client->dev,
 						       "reset", GPIOD_OUT_HIGH);
-	if (IS_ERR(bu21029->reset_gpios)) {
-		error = PTR_ERR(bu21029->reset_gpios);
-		if (error != -EPROBE_DEFER)
-			dev_err(&client->dev,
-				"failed to acquire 'reset' gpio: %d\n", error);
-		return error;
-	}
+	if (IS_ERR(bu21029->reset_gpios))
+		return dev_err_probe(&client->dev, PTR_ERR(bu21029->reset_gpios),
+				     "failed to acquire 'reset' gpio\n");
 
 	in_dev = devm_input_allocate_device(&client->dev);
 	if (!in_dev) {
-- 
2.25.1