6f4a0a44ba
commit 81b039ec36a41a5451e1e36f05bb055eceab1dc8 upstream.
Function platform_get_irq_byname() returns a negative error code on
failure, and a zero or positive number on success. However, in function
cpcap_adc_probe(), positive IRQ numbers are also taken as error cases.
Use "if (ddata->irq < 0)" instead of "if (!ddata->irq)" to validate the
return value of platform_get_irq_byname().
Signed-off-by: Pan Bian <bianpan2016@163.com>
Fixes: 25ec249632d50 ("iio: adc: cpcap: Add minimal support for CPCAP PMIC ADC")
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.