Re: [PATCH 2/4] Input: ad7879 - return plain error code from ad7879_probe()
From: Michael Hennerich
Date: Wed Mar 01 2017 - 05:21:26 EST
On 28.02.2017 23:08, Dmitry Torokhov wrote:
With the switch to devm, there is no need for ad7879_probe() to return the
touchscreen structure, we can use plain error code. This also fixes issue
introduced with devm concersion, where we returned 0 on success (which
worked OK since IS_ERR(0) would not trigger, but was not correct
regardless).
Fixes: 381f688eee3d ("Input: ad7879 - use more devm interfaces")
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Acked-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
---
drivers/input/touchscreen/ad7879-i2c.c | 9 ++-------
drivers/input/touchscreen/ad7879-spi.c | 7 +------
drivers/input/touchscreen/ad7879.c | 28 ++++++++++++++--------------
drivers/input/touchscreen/ad7879.h | 5 ++---
4 files changed, 19 insertions(+), 30 deletions(-)
diff --git a/drivers/input/touchscreen/ad7879-i2c.c b/drivers/input/touchscreen/ad7879-i2c.c
index a282d1c9e2c6..49b902b10c5f 100644
--- a/drivers/input/touchscreen/ad7879-i2c.c
+++ b/drivers/input/touchscreen/ad7879-i2c.c
@@ -27,7 +27,6 @@ static const struct regmap_config ad7879_i2c_regmap_config = {
static int ad7879_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- struct ad7879 *ts;
struct regmap *regmap;
if (!i2c_check_functionality(client->adapter,
@@ -40,12 +39,8 @@ static int ad7879_i2c_probe(struct i2c_client *client,
if (IS_ERR(regmap))
return PTR_ERR(regmap);
- ts = ad7879_probe(&client->dev, regmap, client->irq,
- BUS_I2C, AD7879_DEVID);
- if (IS_ERR(ts))
- return PTR_ERR(ts);
-
- return 0;
+ return ad7879_probe(&client->dev, regmap, client->irq,
+ BUS_I2C, AD7879_DEVID);
}
static const struct i2c_device_id ad7879_id[] = {
diff --git a/drivers/input/touchscreen/ad7879-spi.c b/drivers/input/touchscreen/ad7879-spi.c
index 59486ccba37d..3457a5626d75 100644
--- a/drivers/input/touchscreen/ad7879-spi.c
+++ b/drivers/input/touchscreen/ad7879-spi.c
@@ -32,7 +32,6 @@ static const struct regmap_config ad7879_spi_regmap_config = {
static int ad7879_spi_probe(struct spi_device *spi)
{
- struct ad7879 *ts;
struct regmap *regmap;
/* don't exceed max specified SPI CLK frequency */
@@ -45,11 +44,7 @@ static int ad7879_spi_probe(struct spi_device *spi)
if (IS_ERR(regmap))
return PTR_ERR(regmap);
- ts = ad7879_probe(&spi->dev, regmap, spi->irq, BUS_SPI, AD7879_DEVID);
- if (IS_ERR(ts))
- return PTR_ERR(ts);
-
- return 0;
+ return ad7879_probe(&spi->dev, regmap, spi->irq, BUS_SPI, AD7879_DEVID);
}
#ifdef CONFIG_OF
diff --git a/drivers/input/touchscreen/ad7879.c b/drivers/input/touchscreen/ad7879.c
index 52daaa4edc67..7118f611e222 100644
--- a/drivers/input/touchscreen/ad7879.c
+++ b/drivers/input/touchscreen/ad7879.c
@@ -531,8 +531,8 @@ static void ad7879_cleanup_sysfs(void *_ts)
sysfs_remove_group(&ts->dev->kobj, &ad7879_attr_group);
}
-struct ad7879 *ad7879_probe(struct device *dev, struct regmap *regmap,
- int irq, u16 bustype, u8 devid)
+int ad7879_probe(struct device *dev, struct regmap *regmap,
+ int irq, u16 bustype, u8 devid)
{
struct ad7879_platform_data *pdata = dev_get_platdata(dev);
struct ad7879 *ts;
@@ -542,12 +542,12 @@ struct ad7879 *ad7879_probe(struct device *dev, struct regmap *regmap,
if (irq <= 0) {
dev_err(dev, "No IRQ specified\n");
- return ERR_PTR(-EINVAL);
+ return -EINVAL;
}
ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
if (pdata) {
/* Platform data use swapped axis (backward compatibility) */
@@ -564,13 +564,13 @@ struct ad7879 *ad7879_probe(struct device *dev, struct regmap *regmap,
ad7879_parse_dt(dev, ts);
} else {
dev_err(dev, "No platform data\n");
- return ERR_PTR(-EINVAL);
+ return -EINVAL;
}
input_dev = devm_input_allocate_device(dev);
if (!input_dev) {
dev_err(dev, "Failed to allocate input device\n");
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
}
ts->dev = dev;
@@ -618,14 +618,14 @@ struct ad7879 *ad7879_probe(struct device *dev, struct regmap *regmap,
touchscreen_parse_properties(input_dev, false, NULL);
if (!input_abs_get_max(input_dev, ABS_PRESSURE)) {
dev_err(dev, "Touchscreen pressure is not specified\n");
- return ERR_PTR(-EINVAL);
+ return -EINVAL;
}
}
err = ad7879_write(ts, AD7879_REG_CTRL2, AD7879_RESET);
if (err < 0) {
dev_err(dev, "Failed to write %s\n", input_dev->name);
- return ERR_PTR(err);
+ return err;
}
revid = ad7879_read(ts, AD7879_REG_REVID);
@@ -634,7 +634,7 @@ struct ad7879 *ad7879_probe(struct device *dev, struct regmap *regmap,
if (input_dev->id.product != devid) {
dev_err(dev, "Failed to probe %s (%x vs %x)\n",
input_dev->name, devid, revid);
- return ERR_PTR(-ENODEV);
+ return -ENODEV;
}
ts->cmd_crtl3 = AD7879_YPLUS_BIT |
@@ -659,26 +659,26 @@ struct ad7879 *ad7879_probe(struct device *dev, struct regmap *regmap,
dev_name(dev), ts);
if (err) {
dev_err(dev, "Failed to request IRQ: %d\n", err);
- return ERR_PTR(err);
+ return err;
}
__ad7879_disable(ts);
err = sysfs_create_group(&dev->kobj, &ad7879_attr_group);
if (err)
- return ERR_PTR(err);
+ return err;
err = devm_add_action_or_reset(dev, ad7879_cleanup_sysfs, ts);
if (err)
- return ERR_PTR(err);
+ return err;
err = ad7879_gpio_add(ts, pdata);
if (err)
- return ERR_PTR(err);
+ return err;
err = input_register_device(input_dev);
if (err)
- return ERR_PTR(err);
+ return err;
dev_set_drvdata(dev, ts);
diff --git a/drivers/input/touchscreen/ad7879.h b/drivers/input/touchscreen/ad7879.h
index d3d2e9dc31ae..7e43066a4b68 100644
--- a/drivers/input/touchscreen/ad7879.h
+++ b/drivers/input/touchscreen/ad7879.h
@@ -11,13 +11,12 @@
#include <linux/types.h>
-struct ad7879;
struct device;
struct regmap;
extern const struct dev_pm_ops ad7879_pm_ops;
-struct ad7879 *ad7879_probe(struct device *dev, struct regmap *regmap,
- int irq, u16 bustype, u8 devid);
+int ad7879_probe(struct device *dev, struct regmap *regmap,
+ int irq, u16 bustype, u8 devid);
#endif
--
Greetings,
Michael
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