linux-kernel - Re: [PATCH v3 3/3] iio: kx022a fix irq getting

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Date:   Tue, 16 May 2023 08:30:04 +0300
From:   Matti Vaittinen <mazziesaccount@...il.com>
To:     Jonathan Cameron <jic23@...nel.org>
Cc:     Matti Vaittinen <matti.vaittinen@...rohmeurope.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Daniel Scally <djrscally@...il.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Wolfram Sang <wsa@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Akhil R <akhilrajeev@...dia.com>, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
        linux-iio@...r.kernel.org
Subject: Re: [PATCH v3 3/3] iio: kx022a fix irq getting

On 5/13/23 21:44, Jonathan Cameron wrote:
> On Fri, 12 May 2023 10:53:41 +0300
> Matti Vaittinen <mazziesaccount@...il.com> wrote:
> 
>> The fwnode_irq_get_byname() was returning 0 at device-tree mapping
>> error. If this occurred, the KX022A driver did abort the probe but
>> errorneously directly returned the return value from
>> fwnode_irq_get_byname() from probe. In case of a device-tree mapping
>> error this indicated success.
>>
>> The fwnode_irq_get_byname() has since been fixed to not return zero on
>> error so the check for fwnode_irq_get_byname() can be relaxed to only
>> treat negative values as errors. This will also do decent fix even when
>> backported to branches where fwnode_irq_get_byname() can still return
>> zero on error because KX022A probe should later fail at IRQ requesting
>> and a prober error handling should follow.
> On that basis I've picked this one up directly for the fixes-togreg branch of
> iio.git and marked it for stable.

Thanks for picking this up Jonathan. Although, the commit message is 
slightly misleading w/o the previous patches in this series because the 
fwnode_irq_get_byname() is fixed in the first patch.

Yours,
	-- Matti

-- 
Matti Vaittinen
Linux kernel developer at ROHM Semiconductors
Oulu Finland

~~ When things go utterly wrong vim users can always type :help! ~~