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Date: Thu, 26 Oct 2017 14:17:30 +0200
From: SF Markus Elfring <elfring@...rs.sourceforge.net>
To: linux-iio@...r.kernel.org, Andreas Dannenberg <dannenberg@...com>,
Felipe Balbi <balbi@...com>, Hartmut Knaack <knaack.h@....de>,
Javier Martinez Canillas <javier@....samsung.com>,
Jonathan Cameron <jic23@...nel.org>,
Lars-Peter Clausen <lars@...afoo.de>,
Peter Meerwald-Stadler <pmeerw@...erw.net>
Cc: LKML <linux-kernel@...r.kernel.org>,
kernel-janitors@...r.kernel.org
Subject: [PATCH] iio/light/opt3001: Use common error handling code in
opt3001_get_lux()
From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Thu, 26 Oct 2017 14:06:49 +0200
* Add jump targets so that two error messages are stored only once
at the end of this function implementation.
* Adjust condition checks.
* Replace string literals by references to two global constant variables
in eight functions.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
drivers/iio/light/opt3001.c | 88 +++++++++++++++++++--------------------------
1 file changed, 36 insertions(+), 52 deletions(-)
diff --git a/drivers/iio/light/opt3001.c b/drivers/iio/light/opt3001.c
index 54d88b60e303..23d7d4e6ae61 100644
--- a/drivers/iio/light/opt3001.c
+++ b/drivers/iio/light/opt3001.c
@@ -77,6 +77,9 @@
#define OPT3001_RESULT_READY_SHORT 150
#define OPT3001_RESULT_READY_LONG 1000
+static char const read_failure[] = "failed to read register %02x\n";
+static char const write_failure[] = "failed to write register %02x\n";
+
struct opt3001 {
struct i2c_client *client;
struct device *dev;
@@ -246,11 +249,8 @@ static int opt3001_get_lux(struct opt3001 *opt, int *val, int *val2)
ret = i2c_smbus_write_word_swapped(opt->client,
OPT3001_LOW_LIMIT,
OPT3001_LOW_LIMIT_EOC_ENABLE);
- if (ret < 0) {
- dev_err(opt->dev, "failed to write register %02x\n",
- OPT3001_LOW_LIMIT);
- return ret;
- }
+ if (ret)
+ goto report_write_failure;
/* Allow IRQ to access the device despite lock being set */
opt->ok_to_ignore_lock = true;
@@ -261,20 +261,16 @@ static int opt3001_get_lux(struct opt3001 *opt, int *val, int *val2)
/* Configure for single-conversion mode and start a new conversion */
ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_CONFIGURATION);
- if (ret < 0) {
- dev_err(opt->dev, "failed to read register %02x\n",
- OPT3001_CONFIGURATION);
- goto err;
- }
+ if (ret < 0)
+ goto report_read_failure;
reg = ret;
opt3001_set_mode(opt, ®, OPT3001_CONFIGURATION_M_SINGLE);
ret = i2c_smbus_write_word_swapped(opt->client, OPT3001_CONFIGURATION,
reg);
- if (ret < 0) {
- dev_err(opt->dev, "failed to write register %02x\n",
- OPT3001_CONFIGURATION);
+ if (ret) {
+ dev_err(opt->dev, write_failure, OPT3001_CONFIGURATION);
goto err;
}
@@ -292,11 +288,8 @@ static int opt3001_get_lux(struct opt3001 *opt, int *val, int *val2)
/* Check result ready flag */
ret = i2c_smbus_read_word_swapped(opt->client,
OPT3001_CONFIGURATION);
- if (ret < 0) {
- dev_err(opt->dev, "failed to read register %02x\n",
- OPT3001_CONFIGURATION);
- goto err;
- }
+ if (ret < 0)
+ goto report_read_failure;
if (!(ret & OPT3001_CONFIGURATION_CRF)) {
ret = -ETIMEDOUT;
@@ -306,8 +299,7 @@ static int opt3001_get_lux(struct opt3001 *opt, int *val, int *val2)
/* Obtain value */
ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_RESULT);
if (ret < 0) {
- dev_err(opt->dev, "failed to read register %02x\n",
- OPT3001_RESULT);
+ dev_err(opt->dev, read_failure, OPT3001_RESULT);
goto err;
}
opt->result = ret;
@@ -336,11 +328,8 @@ static int opt3001_get_lux(struct opt3001 *opt, int *val, int *val2)
ret = i2c_smbus_write_word_swapped(opt->client,
OPT3001_LOW_LIMIT,
value);
- if (ret < 0) {
- dev_err(opt->dev, "failed to write register %02x\n",
- OPT3001_LOW_LIMIT);
- return ret;
- }
+ if (ret)
+ goto report_write_failure;
}
exponent = OPT3001_REG_EXPONENT(opt->result);
@@ -349,6 +338,14 @@ static int opt3001_get_lux(struct opt3001 *opt, int *val, int *val2)
opt3001_to_iio_ret(opt, exponent, mantissa, val, val2);
return IIO_VAL_INT_PLUS_MICRO;
+
+report_read_failure:
+ dev_err(opt->dev, read_failure, OPT3001_CONFIGURATION);
+ goto err;
+
+report_write_failure:
+ dev_err(opt->dev, write_failure, OPT3001_LOW_LIMIT);
+ return ret;
}
static int opt3001_get_int_time(struct opt3001 *opt, int *val, int *val2)
@@ -366,8 +363,7 @@ static int opt3001_set_int_time(struct opt3001 *opt, int time)
ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_CONFIGURATION);
if (ret < 0) {
- dev_err(opt->dev, "failed to read register %02x\n",
- OPT3001_CONFIGURATION);
+ dev_err(opt->dev, read_failure, OPT3001_CONFIGURATION);
return ret;
}
@@ -521,7 +517,7 @@ static int opt3001_write_event_value(struct iio_dev *iio,
ret = i2c_smbus_write_word_swapped(opt->client, reg, value);
if (ret < 0) {
- dev_err(opt->dev, "failed to write register %02x\n", reg);
+ dev_err(opt->dev, write_failure, reg);
goto err;
}
@@ -562,8 +558,7 @@ static int opt3001_write_event_config(struct iio_dev *iio,
ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_CONFIGURATION);
if (ret < 0) {
- dev_err(opt->dev, "failed to read register %02x\n",
- OPT3001_CONFIGURATION);
+ dev_err(opt->dev, read_failure, OPT3001_CONFIGURATION);
goto err;
}
@@ -573,8 +568,7 @@ static int opt3001_write_event_config(struct iio_dev *iio,
ret = i2c_smbus_write_word_swapped(opt->client, OPT3001_CONFIGURATION,
reg);
if (ret < 0) {
- dev_err(opt->dev, "failed to write register %02x\n",
- OPT3001_CONFIGURATION);
+ dev_err(opt->dev, write_failure, OPT3001_CONFIGURATION);
goto err;
}
@@ -602,8 +596,7 @@ static int opt3001_read_id(struct opt3001 *opt)
ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_MANUFACTURER_ID);
if (ret < 0) {
- dev_err(opt->dev, "failed to read register %02x\n",
- OPT3001_MANUFACTURER_ID);
+ dev_err(opt->dev, read_failure, OPT3001_MANUFACTURER_ID);
return ret;
}
@@ -612,8 +605,7 @@ static int opt3001_read_id(struct opt3001 *opt)
ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_DEVICE_ID);
if (ret < 0) {
- dev_err(opt->dev, "failed to read register %02x\n",
- OPT3001_DEVICE_ID);
+ dev_err(opt->dev, read_failure, OPT3001_DEVICE_ID);
return ret;
}
@@ -632,8 +624,7 @@ static int opt3001_configure(struct opt3001 *opt)
ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_CONFIGURATION);
if (ret < 0) {
- dev_err(opt->dev, "failed to read register %02x\n",
- OPT3001_CONFIGURATION);
+ dev_err(opt->dev, read_failure, OPT3001_CONFIGURATION);
return ret;
}
@@ -661,15 +652,13 @@ static int opt3001_configure(struct opt3001 *opt)
ret = i2c_smbus_write_word_swapped(opt->client, OPT3001_CONFIGURATION,
reg);
if (ret < 0) {
- dev_err(opt->dev, "failed to write register %02x\n",
- OPT3001_CONFIGURATION);
+ dev_err(opt->dev, write_failure, OPT3001_CONFIGURATION);
return ret;
}
ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_LOW_LIMIT);
if (ret < 0) {
- dev_err(opt->dev, "failed to read register %02x\n",
- OPT3001_LOW_LIMIT);
+ dev_err(opt->dev, read_failure, OPT3001_LOW_LIMIT);
return ret;
}
@@ -678,8 +667,7 @@ static int opt3001_configure(struct opt3001 *opt)
ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_HIGH_LIMIT);
if (ret < 0) {
- dev_err(opt->dev, "failed to read register %02x\n",
- OPT3001_HIGH_LIMIT);
+ dev_err(opt->dev, read_failure, OPT3001_HIGH_LIMIT);
return ret;
}
@@ -700,8 +688,7 @@ static irqreturn_t opt3001_irq(int irq, void *_iio)
ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_CONFIGURATION);
if (ret < 0) {
- dev_err(opt->dev, "failed to read register %02x\n",
- OPT3001_CONFIGURATION);
+ dev_err(opt->dev, read_failure, OPT3001_CONFIGURATION);
goto out;
}
@@ -722,8 +709,7 @@ static irqreturn_t opt3001_irq(int irq, void *_iio)
} else if (ret & OPT3001_CONFIGURATION_CRF) {
ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_RESULT);
if (ret < 0) {
- dev_err(opt->dev, "failed to read register %02x\n",
- OPT3001_RESULT);
+ dev_err(opt->dev, read_failure, OPT3001_RESULT);
goto out;
}
opt->result = ret;
@@ -810,8 +796,7 @@ static int opt3001_remove(struct i2c_client *client)
ret = i2c_smbus_read_word_swapped(opt->client, OPT3001_CONFIGURATION);
if (ret < 0) {
- dev_err(opt->dev, "failed to read register %02x\n",
- OPT3001_CONFIGURATION);
+ dev_err(opt->dev, read_failure, OPT3001_CONFIGURATION);
return ret;
}
@@ -821,8 +806,7 @@ static int opt3001_remove(struct i2c_client *client)
ret = i2c_smbus_write_word_swapped(opt->client, OPT3001_CONFIGURATION,
reg);
if (ret < 0) {
- dev_err(opt->dev, "failed to write register %02x\n",
- OPT3001_CONFIGURATION);
+ dev_err(opt->dev, write_failure, OPT3001_CONFIGURATION);
return ret;
}
--
2.14.3
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