From: "Köry Maincent" <kory.maincent@bootlin.com>
To: Elad Nachman <enachman@marvell.com>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
Taras Chornyi <taras.chornyi@plvision.eu>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
Miquel Raynal <miquel.raynal@bootlin.com>
Subject: Re: [EXT] Prestera driver fail to probe twice
Date: Wed, 7 Feb 2024 12:28:38 +0100 [thread overview]
Message-ID: <20240207122838.382fd1b2@kmaincent-XPS-13-7390> (raw)
In-Reply-To: <BN9PR18MB42510F2EA6F4091E5CA3B409DB452@BN9PR18MB4251.namprd18.prod.outlook.com>
On Wed, 7 Feb 2024 10:56:29 +0000
Elad Nachman <enachman@marvell.com> wrote:
> > -----Original Message-----
> > From: Köry Maincent <kory.maincent@bootlin.com>
> > Sent: Wednesday, February 7, 2024 12:23 PM
> > To: Elad Nachman <enachman@marvell.com>
> > Cc: netdev@vger.kernel.org; Taras Chornyi <taras.chornyi@plvision.eu>;
> > Thomas Petazzoni <thomas.petazzoni@bootlin.com>; Miquel Raynal
> > <miquel.raynal@bootlin.com>
> > Subject: Re: [EXT] Prestera driver fail to probe twice
> >
> > On Tue, 6 Feb 2024 18:30:33 +0000
> > Elad Nachman <enachman@marvell.com> wrote:
> >
> > > Sorry, that's not how this works.
> > >
> > > The firmware CPU loader will only reload if the firmware crashed or exit.
> > >
> > > Hence, insmod on the host side will fail, as the firmware side loader
> > > is not waiting For the host to send a new firmware, but first for the
> > > existing firmware to exit.
> >
> > With the current implementation we can't rmmod/insmod the driver.
> > Also, in case of deferring probe the same problem appears and the driver
> > will never probe. I don't think this is a good behavior.
> >
> > Isn't it possible to verify that the firmware has already been sent and is
> > working well at the probe time? Then we wouldn't try to flash it.
>
> Everything is possible, but that is the way the firmware interface was
> initially designed. Changing this will break compatibility with board already
> deployed in the field.
I don't understand, why fixing the probe by not flashing the firmware if it is
already flashed, will break compatibility?
Do I miss something?
Regards,
--
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com
next prev parent reply other threads:[~2024-02-07 11:28 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-06 15:54 Prestera driver fail to probe twice Köry Maincent
2024-02-06 18:30 ` [EXT] " Elad Nachman
2024-02-07 10:22 ` Köry Maincent
2024-02-07 10:56 ` Elad Nachman
2024-02-07 11:28 ` Köry Maincent [this message]
2024-02-07 12:24 ` Elad Nachman
2024-02-07 14:31 ` Köry Maincent
2024-02-07 15:06 ` Elad Nachman
2024-02-07 18:31 ` Jakub Kicinski
2024-02-08 7:36 ` Elad Nachman
2024-02-08 15:37 ` Jakub Kicinski
2024-02-13 0:29 ` Jakub Kicinski
2024-02-07 23:32 ` Andrew Lunn
2024-02-08 9:10 ` Köry Maincent
2024-02-08 14:56 ` Andrew Lunn
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