iio: adc: ti-ads1298: Add NULL check in ads1298_init

devm_kasprintf() can return a NULL pointer on failure. A check on the
return value of such a call in ads1298_init() is missing. Add it.

Fixes: 00ef770 ("iio: adc: ti-ads1298: Add driver")
Signed-off-by: Charles Han <hanchunchao@inspur.com>
Link: https://patch.msgid.link/20241118090208.14586-1-hanchunchao@inspur.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Author: Charles Han

drivers/iio/adc/ti-ads1298.c

@@ -613,6 +613,8 @@ static int ads1298_init(struct iio_dev *indio_dev)
 	}
 	indio_dev->name = devm_kasprintf(dev, GFP_KERNEL, "ads129%u%s",
 					 indio_dev->num_channels, suffix);
+	if (!indio_dev->name)
+		return -ENOMEM;
 
 	/* Enable internal test signal, double amplitude, double frequency */
 	ret = regmap_write(priv->regmap, ADS1298_REG_CONFIG2,