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staging:iio:adt7316 Fix some 'interesting' string operations

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Calling memcmp() to check the value of the first byte in a string is overkill.
Just use buf[0] == '1' or buf[0] != '1' as appropriate.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Luck, Tony 2013-04-04 22:37:00 +01:00 committed by Jonathan Cameron
parent 5993f3a269
commit 9f16778c5d
1 changed files with 13 additions and 13 deletions
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26
drivers/staging/iio/addac/adt7316.c
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@ -256,7 +256,7 @@ static ssize_t adt7316_store_enabled(struct device *dev,
struct adt7316_chip_info *chip = iio_priv(dev_info);
int enable;
if (!memcmp(buf, "1", 1))
if (buf[0] == '1')
enable = 1;
else
enable = 0;
@ -299,7 +299,7 @@ static ssize_t adt7316_store_select_ex_temp(struct device *dev,
return -EPERM;
config1 = chip->config1 & (~ADT7516_SEL_EX_TEMP);
if (!memcmp(buf, "1", 1))
if (buf[0] == '1')
config1 |= ADT7516_SEL_EX_TEMP;
ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG1, config1);
@ -495,7 +495,7 @@ static ssize_t adt7316_store_disable_averaging(struct device *dev,
int ret;
config2 = chip->config2 & (~ADT7316_DISABLE_AVERAGING);
if (!memcmp(buf, "1", 1))
if (buf[0] == '1')
config2 |= ADT7316_DISABLE_AVERAGING;
ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG2, config2);
@ -534,7 +534,7 @@ static ssize_t adt7316_store_enable_smbus_timeout(struct device *dev,
int ret;
config2 = chip->config2 & (~ADT7316_EN_SMBUS_TIMEOUT);
if (!memcmp(buf, "1", 1))
if (buf[0] == '1')
config2 |= ADT7316_EN_SMBUS_TIMEOUT;
ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG2, config2);
@ -597,7 +597,7 @@ static ssize_t adt7316_store_powerdown(struct device *dev,
int ret;
config1 = chip->config1 & (~ADT7316_PD);
if (!memcmp(buf, "1", 1))
if (buf[0] == '1')
config1 |= ADT7316_PD;
ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG1, config1);
@ -635,7 +635,7 @@ static ssize_t adt7316_store_fast_ad_clock(struct device *dev,
int ret;
config3 = chip->config3 & (~ADT7316_ADCLK_22_5);
if (!memcmp(buf, "1", 1))
if (buf[0] == '1')
config3 |= ADT7316_ADCLK_22_5;
ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, config3);
@ -681,7 +681,7 @@ static ssize_t adt7316_store_da_high_resolution(struct device *dev,
chip->dac_bits = 8;
if (!memcmp(buf, "1", 1)) {
if (buf[0] == '1') {
config3 = chip->config3 | ADT7316_DA_HIGH_RESOLUTION;
if (chip->id == ID_ADT7316 || chip->id == ID_ADT7516)
chip->dac_bits = 12;
@ -731,7 +731,7 @@ static ssize_t adt7316_store_AIN_internal_Vref(struct device *dev,
if ((chip->id & ID_FAMILY_MASK) != ID_ADT75XX)
return -EPERM;
if (memcmp(buf, "1", 1))
if (buf[0] != '1')
config3 = chip->config3 & (~ADT7516_AIN_IN_VREF);
else
config3 = chip->config3 | ADT7516_AIN_IN_VREF;
@ -773,7 +773,7 @@ static ssize_t adt7316_store_enable_prop_DACA(struct device *dev,
int ret;
config3 = chip->config3 & (~ADT7316_EN_IN_TEMP_PROP_DACA);
if (!memcmp(buf, "1", 1))
if (buf[0] == '1')
config3 |= ADT7316_EN_IN_TEMP_PROP_DACA;
ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, config3);
@ -812,7 +812,7 @@ static ssize_t adt7316_store_enable_prop_DACB(struct device *dev,
int ret;
config3 = chip->config3 & (~ADT7316_EN_EX_TEMP_PROP_DACB);
if (!memcmp(buf, "1", 1))
if (buf[0] == '1')
config3 |= ADT7316_EN_EX_TEMP_PROP_DACB;
ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, config3);
@ -1018,7 +1018,7 @@ static ssize_t adt7316_store_DA_AB_Vref_bypass(struct device *dev,
return -EPERM;
dac_config = chip->dac_config & (~ADT7316_VREF_BYPASS_DAC_AB);
if (!memcmp(buf, "1", 1))
if (buf[0] == '1')
dac_config |= ADT7316_VREF_BYPASS_DAC_AB;
ret = chip->bus.write(chip->bus.client, ADT7316_DAC_CONFIG, dac_config);
@ -1063,7 +1063,7 @@ static ssize_t adt7316_store_DA_CD_Vref_bypass(struct device *dev,
return -EPERM;
dac_config = chip->dac_config & (~ADT7316_VREF_BYPASS_DAC_CD);
if (!memcmp(buf, "1", 1))
if (buf[0] == '1')
dac_config |= ADT7316_VREF_BYPASS_DAC_CD;
ret = chip->bus.write(chip->bus.client, ADT7316_DAC_CONFIG, dac_config);
@ -1982,7 +1982,7 @@ static ssize_t adt7316_set_int_enabled(struct device *dev,
int ret;
config1 = chip->config1 & (~ADT7316_INT_EN);
if (!memcmp(buf, "1", 1))
if (buf[0] == '1')
config1 |= ADT7316_INT_EN;
ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG1, config1);