diff options
| author | Jingoo Han <jg1.han@samsung.com> | 2012-10-28 18:45:11 -0700 |
|---|---|---|
| committer | Bryan Wu <cooloney@gmail.com> | 2012-11-26 14:28:49 -0800 |
| commit | 1b21ec5a2852ffd8db4189d4ef1c221aabc64936 (patch) | |
| tree | 0de75151f99df8b7ec23b106171075f5464875dc | |
| parent | 04553e925baaa815025c6fd3cdc301a794fa2c74 (diff) | |
leds: leds-lp5523: fix build warnings
This patch fixes build warnings as below:
drivers/leds/leds-lp5523.c: In function 'lp5523_selftest':
drivers/leds/leds-lp5523.c:496:18: warning: 'adc' may be used uninitialized in this function [-Wuninitialized]
drivers/leds/leds-lp5523.c:471:5: warning: 'vdd' may be used uninitialized in this function [-Wuninitialized]
drivers/leds/leds-lp5523.c: In function 'lp5523_probe':
drivers/leds/leds-lp5523.c:252:9: warning: 'status' may be used uninitialized in this function [-Wuninitialized]
drivers/leds/leds-lp5523.c:201:5: note: 'status' was declared here
If lp5523_read() returns an error, problems will happen. Thus,
when lp5523_read() returns an error, it should be handled.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
| -rw-r--r-- | drivers/leds/leds-lp5523.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c index 97994ffdc014..4ddf7b445a83 100644 --- a/drivers/leds/leds-lp5523.c +++ b/drivers/leds/leds-lp5523.c @@ -248,7 +248,10 @@ static int lp5523_configure(struct i2c_client *client) /* Let the programs run for couple of ms and check the engine status */ usleep_range(3000, 6000); - lp5523_read(client, LP5523_REG_STATUS, &status); + ret = lp5523_read(client, LP5523_REG_STATUS, &status); + if (ret < 0) + return ret; + status &= LP5523_ENG_STATUS_MASK; if (status == LP5523_ENG_STATUS_MASK) { @@ -464,10 +467,16 @@ static ssize_t lp5523_selftest(struct device *dev, LP5523_EN_LEDTEST | 16); usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */ ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status); + if (ret < 0) + goto fail; + if (!(status & LP5523_LEDTEST_DONE)) usleep_range(3000, 6000); /* Was not ready. Wait little bit */ - ret |= lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &vdd); + ret = lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &vdd); + if (ret < 0) + goto fail; + vdd--; /* There may be some fluctuation in measurement */ for (i = 0; i < LP5523_LEDS; i++) { @@ -489,9 +498,14 @@ static ssize_t lp5523_selftest(struct device *dev, /* ADC conversion time is 2.7 ms typically */ usleep_range(3000, 6000); ret = lp5523_read(chip->client, LP5523_REG_STATUS, &status); + if (ret < 0) + goto fail; + if (!(status & LP5523_LEDTEST_DONE)) usleep_range(3000, 6000);/* Was not ready. Wait. */ - ret |= lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &adc); + ret = lp5523_read(chip->client, LP5523_REG_LED_TEST_ADC, &adc); + if (ret < 0) + goto fail; if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM) pos += sprintf(buf + pos, "LED %d FAIL\n", i); |