linux-kernel - Re: [PATCH] usb: ohci-at91: Use dynamic device name for OHCI HCD creation

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Message-ID: <afaf4c79-ccec-46ad-889c-e8347454c065@rowland.harvard.edu>
Date: Wed, 11 Jun 2025 10:08:41 -0400
From: Alan Stern <stern@...land.harvard.edu>
To: Mihai Sain <mihai.sain@...rochip.com>
Cc: gregkh@...uxfoundation.org, nicolas.ferre@...rochip.com,
	alexandre.belloni@...tlin.com, claudiu.beznea@...on.dev,
	linux-usb@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] usb: ohci-at91: Use dynamic device name for OHCI HCD
 creation

On Wed, Jun 11, 2025 at 10:54:15AM +0300, Mihai Sain wrote:
> Use the dynamic device name instead of the hardcoded string "at91"
> when creating the OHCI host controller driver.
> This ensures that the device name is more flexible
> and correctly reflects the actual device in the system.
> This will be in sync with ehci at91 driver.
> 
> [root@...9x75eb ~]$ dmesg | grep usb
> [    1.464487] usb usb1: Manufacturer: Linux 6.16.0-rc1 ehci_hcd
> [    1.470210] usb usb1: SerialNumber: 700000.usb-ehci
> [    1.595683] usb usb2: Manufacturer: Linux 6.16.0-rc1 ohci_hcd
> [    1.601406] usb usb2: SerialNumber: 600000.usb-ohci
> 
> [root@...9x75eb ~]$ cat /proc/iomem | grep usb
> 00600000-006fffff : 600000.usb-ohci usb-ohci@...000
> 00700000-007fffff : 700000.usb-ehci usb-ehci@...000

Are these two outputs supposed to make some sort of point?  It would be 
better to have a before-and-after comparison, so we can see what the 
effect of the patch is.

Alan Stern