netdev - Prestera driver fail to probe twice

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Message-ID: <20240206165406.24008997@kmaincent-XPS-13-7390>
Date: Tue, 6 Feb 2024 16:54:06 +0100
From: Köry Maincent <kory.maincent@...tlin.com>
To: netdev@...r.kernel.org, Taras Chornyi <taras.chornyi@...ision.eu>
Cc: Thomas Petazzoni <thomas.petazzoni@...tlin.com>, Miquel Raynal
 <miquel.raynal@...tlin.com>
Subject: Prestera driver fail to probe twice

Hello,

It seems the prestera driver has never been tested as a module or in a
probe defer case:

# insmod /mnt/prestera.ko 
# insmod /mnt/prestera_pci.ko
[   87.927343] Prestera DX 0000:01:00.0: Loading mrvl/prestera/mvsw_prestera_fw-v4.1.img ...
[   87.935600] Prestera DX 0000:01:00.0: FW version '4.1.0'
[   91.556693] Prestera DX 0000:01:00.0: Prestera FW is ready
[   99.431226] Prestera DX 0000:01:00.0: using random base mac address
# rmmod /mnt/prestera_pci.ko 
# insmod /mnt/prestera_pci.ko
[  122.938273] Prestera DX 0000:01:00.0: waiting for FW loader is timed out
[  122.945163] prestera_pci_probe : 944, err -110
[  122.949704] Prestera DX: probe of 0000:01:00.0 failed with error -110

We have to find a way to detect if the firmware has already been flashed.
I am not familiar with this controller and don't have its datasheet.
Could someone handle it?

Thanks,
Regards,
-- 
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com