lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Fri, 4 Sep 2020 16:23:47 +0200
From:   Andrew Lunn <>
To:     Adam Rudziński <>
Cc:     Florian Fainelli <>,,,,,,,,,
Subject: Re: [PATCH net-next 0/3] net: phy: Support enabling clocks prior to
 bus probe

On Fri, Sep 04, 2020 at 04:00:55PM +0200, Adam Rudziński wrote:
> W dniu 2020-09-04 o 15:45, Andrew Lunn pisze:
> > > Just a bunch of questions.
> > > 
> > > Actually, why is it necessary to have a full MDIO bus scan already during
> > > probing peripherals?
> > That is the Linux bus model. It does not matter what sort of bus it
> > is, PCI, USB, MDIO, etc. When the bus driver is loaded, the bus is
> > enumerated and drivers probe for each device found on the bus.
> OK. But is it always expected to find all the devices on the bus in the
> first run?

Yes. Cold plug expects to find all the device while scanning the bus.

> Does the bus model ever allow to just add any more devices? Kind of,
> "hotplug". :)

Hotplug is triggered by hardware saying a new device has been
added/removed after cold plug.

This is not a hotplug case. The hardware has not suddenly appeared, it
has always been there.


Powered by blists - more mailing lists