From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: netdev <netdev@vger.kernel.org>,
Jason Cooper <jason@lakedaemon.net>, Andrew Lunn <andrew@lunn.ch>,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
Gregory Clement <gregory.clement@free-electrons.com>,
Russell King <linux@armlinux.org.uk>,
Vivien Didelot <vivien.didelot@savoirfairelinux.com>,
"David S. Miller" <davem@davemloft.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"moderated list:ARM/Marvell Dove/MV78xx0/Orion SOC support"
<linux-arm-kernel@lists.infradead.org>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH net-next v4 05/10] drivers: base: Add device_find_in_class_name()
Date: Wed, 18 Jan 2017 01:34:22 +0200 [thread overview]
Message-ID: <CAHp75VfE8t+_2Yu1NYMErKopnCNwFakO6pyDRmqAU-ZsGuyvmg@mail.gmail.com> (raw)
In-Reply-To: <20170117232152.1661-6-f.fainelli@gmail.com>
On Wed, Jan 18, 2017 at 1:21 AM, Florian Fainelli <f.fainelli@gmail.com> wrote:
> Add a helper function to lookup a device reference given a class name.
> This is a preliminary patch to remove adhoc code from net/dsa/dsa.c and
> make it more generic.
> +static int device_class_name_match(struct device *dev, void *class)
And why not const char *class?
> +{
> + if (dev->class != NULL && !strcmp(dev->class->name, class))
if (dev->class && ...)
> + return 1;
> +
> + return 0;
Perhaps even one line:
return dev->class && ...;
> +}
> +
> +/**
> + * device_find_in_class_name - device iterator for locating a particular device
> + * within the specified class name
> + * @parent: parent struct device
> + * @class_name: Class name to match against
> + *
> + * This function returns 1 if the device (specified by @parent), or one of its child
> + * is in the class whose name is specified by @class_name. Returns 0 otherwise.
> + *
> + * NOTE: you will need to drop the reference with put_device() after use.
> + */
> +struct device *device_find_in_class_name(struct device *parent,
> + char *class_name)
const char *class_name
> +{
> + if (device_class_name_match(parent, class_name)) {
> + get_device(parent);
> + return parent;
> + }
> +
> + return device_find_child(parent, class_name, device_class_name_match);
> +}
> +EXPORT_SYMBOL_GPL(device_find_in_class_name);
> +extern struct device *device_find_in_class_name(struct device *parent,
> + char *class_name);
Ditto.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2017-01-17 23:34 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-17 23:21 [PATCH net-next v4 00/10] net: dsa: Support for pdata in dsa2 Florian Fainelli
2017-01-17 23:21 ` [PATCH net-next v4 01/10] net: dsa: Pass device pointer to dsa_register_switch Florian Fainelli
2017-01-17 23:21 ` [PATCH net-next v4 02/10] net: dsa: Make most functions take a dsa_port argument Florian Fainelli
2017-01-17 23:21 ` [PATCH net-next v4 03/10] net: dsa: Suffix function manipulating device_node with _dn Florian Fainelli
2017-01-17 23:21 ` [PATCH net-next v4 04/10] net: dsa: Move ports assignment closer to error checking Florian Fainelli
2017-01-17 23:21 ` [PATCH net-next v4 05/10] drivers: base: Add device_find_in_class_name() Florian Fainelli
2017-01-17 23:34 ` Andy Shevchenko [this message]
2017-01-17 23:43 ` Florian Fainelli
2017-01-18 0:00 ` Andy Shevchenko
2017-01-18 0:04 ` Florian Fainelli
2017-01-18 0:07 ` Andy Shevchenko
2017-01-18 0:13 ` Florian Fainelli
2017-01-18 7:06 ` Greg Kroah-Hartman
2017-01-17 23:21 ` [PATCH net-next v4 06/10] net: dsa: Migrate to device_find_in_class_name() Florian Fainelli
2017-01-17 23:21 ` [PATCH net-next v4 07/10] net: Relocate dev_to_net_device() into net/core/dev.c Florian Fainelli
2017-01-17 23:21 ` [PATCH net-next v4 08/10] net: dsa: Add support for platform data Florian Fainelli
2017-01-17 23:21 ` [PATCH net-next v4 09/10] net: phy: Allow pre-declaration of MDIO devices Florian Fainelli
2017-01-17 23:21 ` [PATCH net-next v4 10/10] ARM: orion: Register DSA switch as a MDIO device Florian Fainelli
2017-01-18 21:50 ` [PATCH net-next v4 00/10] net: dsa: Support for pdata in dsa2 David Miller
2017-01-18 22:06 ` Florian Fainelli
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CAHp75VfE8t+_2Yu1NYMErKopnCNwFakO6pyDRmqAU-ZsGuyvmg@mail.gmail.com \
--to=andy.shevchenko@gmail.com \
--cc=andrew@lunn.ch \
--cc=davem@davemloft.net \
--cc=f.fainelli@gmail.com \
--cc=gregkh@linuxfoundation.org \
--cc=gregory.clement@free-electrons.com \
--cc=jason@lakedaemon.net \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=netdev@vger.kernel.org \
--cc=sebastian.hesselbarth@gmail.com \
--cc=vivien.didelot@savoirfairelinux.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).