From: Dan Carpenter <dan.carpenter@oracle.com>
To: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Daniel Scally <djrscally@gmail.com>,
devel@driverdev.osuosl.org, robh@kernel.org,
andriy.shevchenko@linux.intel.com, jorhand@linux.microsoft.com,
linux-media@vger.kernel.org, gregkh@linuxfoundation.org,
linux-kernel@vger.kernel.org, kieran.bingham@ideasonboard.com,
kitakar@gmail.com, bingbu.cao@intel.com, mchehab@kernel.org,
davem@davemloft.net, tian.shu.qiu@intel.com, yong.zhi@intel.com
Subject: Re: [RFC PATCH] Add bridge driver to connect sensors to CIO2 device via software nodes on ACPI platforms
Date: Thu, 17 Sep 2020 13:49:41 +0300 [thread overview]
Message-ID: <20200917104941.GP4282@kadam> (raw)
In-Reply-To: <20200917103343.GW26842@paasikivi.fi.intel.com>
On Thu, Sep 17, 2020 at 01:33:43PM +0300, Sakari Ailus wrote:
> > +static int connect_supported_devices(void)
> > +{
> > + struct acpi_device *adev;
> > + struct device *dev;
> > + struct sensor_bios_data ssdb;
> > + struct sensor *sensor;
> > + struct property_entry *sensor_props;
> > + struct property_entry *cio2_props;
> > + struct fwnode_handle *fwnode;
> > + struct software_node *nodes;
> > + struct v4l2_subdev *sd;
> > + int i, ret;
>
> unsigned int i
>
Why?
For list iterators then "int i;" is best... For sizes then unsigned is
sometimes best. Or if it's part of the hardware spec or network spec
unsigned is best. Otherwise unsigned variables cause a ton of bugs.
They're not as intuitive as signed variables. Imagine if there is an
error in this loop and you want to unwind. With a signed variable you
can do:
while (--i >= 0)
cleanup(&bridge.sensors[i]);
There are very few times where raising the type maximum from 2 billion
to 4 billion fixes anything.
regards,
dan carpenter
next prev parent reply other threads:[~2020-09-17 10:54 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-16 21:36 [RFC PATCH] Add bridge driver to connect sensors to CIO2 device via software nodes on ACPI platforms Daniel Scally
2020-09-17 7:53 ` Greg KH
2020-09-17 9:47 ` Dan Scally
2020-09-17 10:15 ` Dan Carpenter
2020-09-17 10:24 ` Dan Scally
2020-09-17 13:28 ` Kieran Bingham
2020-09-17 14:08 ` Andy Shevchenko
2020-09-17 14:19 ` Kieran Bingham
2020-09-17 14:36 ` Andy Shevchenko
2020-09-17 9:34 ` Dan Carpenter
2020-09-17 10:19 ` Joe Perches
2020-09-18 22:50 ` Dan Scally
2020-09-17 10:33 ` Sakari Ailus
2020-09-17 10:49 ` Dan Carpenter [this message]
2020-09-17 12:25 ` Andy Shevchenko
2020-09-17 13:15 ` Dan Carpenter
2020-09-18 6:40 ` Sakari Ailus
2020-09-18 8:16 ` Dan Carpenter
2020-09-17 10:52 ` Dan Scally
2020-09-17 12:45 ` Andy Shevchenko
2020-09-17 13:36 ` Dan Scally
2020-09-17 14:14 ` Andy Shevchenko
2020-09-17 21:25 ` Daniel Scally
2020-09-17 14:44 ` Andy Shevchenko
2020-09-18 7:51 ` Sakari Ailus
2020-09-18 13:07 ` Andy Shevchenko
2020-09-21 13:33 ` Dan Scally
2020-09-21 14:33 ` Andy Shevchenko
2020-09-23 9:39 ` Dan Scally
2020-09-28 11:37 ` Dan Scally
2020-09-18 8:03 ` Dan Carpenter
2020-09-18 8:09 ` Dan Scally
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