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From: Heiner Kallweit <hkallweit1@gmail.com>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Pavel Machek <pavel@ucw.cz>,
	Tony Nguyen <anthony.l.nguyen@intel.com>,
	davem@davemloft.net, kuba@kernel.org,
	Kurt Kanzenbach <kurt@linutronix.de>,
	netdev@vger.kernel.org, sasha.neftin@intel.com,
	vitaly.lifshits@intel.com, vinicius.gomes@intel.com,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>,
	"linux-leds@vger.kernel.org" <linux-leds@vger.kernel.org>
Subject: Re: [PATCH net-next 5/5] igc: Export LEDs
Date: Wed, 21 Jul 2021 18:02:57 +0200	[thread overview]
Message-ID: <0bf24356-0090-a2d7-cd77-40cf04e05097@gmail.com> (raw)
In-Reply-To: <YPgwr2MB5gQVgDff@lunn.ch>

On 21.07.2021 16:35, Andrew Lunn wrote:
>> Thanks for the hint, Andrew. If I make &netdev->dev the parent,
>> then I get:
>>
>> ll /sys/class/leds/
>> total 0
>> lrwxrwxrwx 1 root root 0 Jul 20 21:37 led0 -> ../../devices/pci0000:00/0000:00:1d.0/0000:03:00.0/net/enp3s0/led0
>> lrwxrwxrwx 1 root root 0 Jul 20 21:37 led1 -> ../../devices/pci0000:00/0000:00:1d.0/0000:03:00.0/net/enp3s0/led1
>> lrwxrwxrwx 1 root root 0 Jul 20 21:37 led2 -> ../../devices/pci0000:00/0000:00:1d.0/0000:03:00.0/net/enp3s0/led2
>>
>> Now the (linked) LED devices are under /sys/class/net/<ifname>, but still
>> the primary LED devices are under /sys/class/leds and their names have
>> to be unique therefore. The LED subsystem takes care of unique names,
>> but in case of a second network interface the LED device name suddenly
>> would be led0_1 (IIRC). So the names wouldn't be predictable, and I think
>> that's not what we want.
> 
> We need input from the LED maintainers, but do we actually need the
> symbolic links in /sys/class/leds/? For this specific use case, not
> generally. Allow an LED to opt out of the /sys/class/leds symlink.
> 

The links are created here:

led_classdev_register_ext()
-> device_create_with_groups()
   -> device_add()
      -> device_add_class_symlinks()

So it seems we'd need an extension to the device core to support
class link opt-out.

> If we could drop those, we can relax the naming requirements so that
> the names is unique to a parent device, not globally unique.
> 
>     Andrew
> 
Heiner

  reply	other threads:[~2021-07-21 16:03 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-16 21:24 [PATCH net-next 0/5][pull request] 1GbE Intel Wired LAN Driver Updates 2021-07-16 Tony Nguyen
2021-07-16 21:24 ` [PATCH net-next 1/5] igc: Add possibility to add flex filter Tony Nguyen
2021-07-16 21:24 ` [PATCH net-next 2/5] igc: Integrate flex filter into ethtool ops Tony Nguyen
2021-07-16 21:24 ` [PATCH net-next 3/5] igc: Allow for Flex Filters to be installed Tony Nguyen
2021-07-16 21:24 ` [PATCH net-next 4/5] igc: Make flex filter more flexible Tony Nguyen
2021-07-16 21:24 ` [PATCH net-next 5/5] igc: Export LEDs Tony Nguyen
2021-07-16 21:56   ` Andrew Lunn
2021-07-18 22:10     ` Heiner Kallweit
2021-07-18 22:33       ` Andrew Lunn
2021-07-19  6:17         ` Kurt Kanzenbach
2021-07-19  9:46           ` Jakub Kicinski
2021-07-19  6:06     ` Kurt Kanzenbach
2021-07-19 13:15       ` Andrew Lunn
2021-07-20  8:54         ` Kurt Kanzenbach
2021-07-21 19:18         ` Marek Behún
2021-07-18 22:19   ` Heiner Kallweit
2021-07-19  0:40     ` Andrew Lunn
2021-07-20 15:00       ` Heiner Kallweit
2021-07-20 15:42         ` Andrew Lunn
2021-07-20 20:29           ` Heiner Kallweit
2021-07-21 14:35             ` Andrew Lunn
2021-07-21 16:02               ` Heiner Kallweit [this message]
2021-07-21 18:23               ` Pavel Machek
2021-07-21 18:25                 ` Pavel Machek
2021-07-21 18:45             ` Marek Behún
2021-07-21 19:50               ` Andrew Lunn
2021-07-21 20:07                 ` Marek Behún
2021-07-21 20:54                   ` Andrew Lunn
2021-07-21 21:31                     ` Marek Behún
2021-07-21 22:45                     ` Pavel Machek
2021-07-22  1:45                       ` Andrew Lunn
2021-07-22  2:19                         ` Marek Behún
2021-07-21 22:34                   ` Pavel Machek
2021-07-22  3:52                   ` Florian Fainelli
2021-07-26 17:42                   ` Jacek Anaszewski
2021-07-26 18:44                     ` Marek Behún
2021-07-26 20:59                     ` Heiner Kallweit
2021-07-27  0:06                       ` Marek Behún
2021-07-27  1:57                         ` Andrew Lunn
2021-07-27  8:15                           ` Michael Walle
2021-07-27 14:56                             ` Marek Behún
2021-07-27 15:03                               ` Michael Walle
2021-07-27 15:24                                 ` Andrew Lunn
2021-07-27 15:28                                 ` Marek Behún
2021-07-27 15:53                                   ` Michael Walle
2021-07-27 16:23                                     ` Andrew Lunn
2021-07-27 16:32                                     ` Marek Behún
2021-07-27 16:42                                       ` Andrew Lunn
2021-07-27 19:42                                       ` Michael Walle
2021-07-28 20:43                                       ` Heiner Kallweit
2021-07-29  6:39                                         ` Kurt Kanzenbach
2021-07-29  8:59                                         ` Marek Behún
2021-07-29 21:54                                           ` Heiner Kallweit
2021-08-10 17:29                                         ` Pavel Machek
2021-08-10 17:55                                           ` Marek Behún
2021-08-10 19:53                                             ` Pavel Machek
2021-08-10 20:53                                               ` Marek Behún
2021-08-17 19:02                                                 ` Pavel Machek
2021-08-25 15:26                                                   ` Marek Behún
2021-08-26 12:45                                                     ` Pavel Machek
2021-08-10 20:46                                           ` Heiner Kallweit
2021-08-10 21:21                                             ` Andrew Lunn
2021-07-27 13:55                           ` Marek Behún
2021-08-10 17:22                             ` Documentation for naming LEDs was " Pavel Machek
2021-07-19 21:48   ` Jesse Brandeburg
2021-07-20 13:31     ` Kurt Kanzenbach
2021-07-17  0:30 ` [PATCH net-next 0/5][pull request] 1GbE Intel Wired LAN Driver Updates 2021-07-16 patchwork-bot+netdevbpf
2021-07-17 17:36   ` Andrew Lunn

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