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iio: adc: xilinx: Check for return values in clk related functions

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This patch adds check for return values from clock related functions.
This was reported by static code analysis tool.

Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Manish Narani 2018-07-23 20:32:00 +05:30 committed by Jonathan Cameron
parent be38866fbb
commit 0a8460966f
1 changed files with 9 additions and 2 deletions
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11
drivers/iio/adc/xilinx-xadc-core.c
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@ -340,6 +340,8 @@ static int xadc_zynq_setup(struct platform_device *pdev,
xadc->zynq_intmask = ~0;
pcap_rate = clk_get_rate(xadc->clk);
if (!pcap_rate)
return -EINVAL;
if (tck_rate > pcap_rate / 2) {
div = 2;
@ -887,6 +889,9 @@ static int xadc_write_raw(struct iio_dev *indio_dev,
unsigned long clk_rate = xadc_get_dclk_rate(xadc);
unsigned int div;
if (!clk_rate)
return -EINVAL;
if (info != IIO_CHAN_INFO_SAMP_FREQ)
return -EINVAL;
@ -1237,8 +1242,10 @@ static int xadc_probe(struct platform_device *pdev)
goto err_free_irq;
/* Disable all alarms */
xadc_update_adc_reg(xadc, XADC_REG_CONF1, XADC_CONF1_ALARM_MASK,
XADC_CONF1_ALARM_MASK);
ret = xadc_update_adc_reg(xadc, XADC_REG_CONF1, XADC_CONF1_ALARM_MASK,
XADC_CONF1_ALARM_MASK);
if (ret)
goto err_free_irq;
/* Set thresholds to min/max */
for (i = 0; i < 16; i++) {