Re: [PATCH net] net: usb: lan78xx: fix use of improperly initialized dev->chipid in lan78xx_reset

[I Viswanath]

On Tue, 7 Oct 2025 at 06:52, David Hunter <david.hunter.linux@xxxxxxxxx> wrote:
>
> Please describe the testing you performed.

I used the reproducer provided at
https://syzkaller.appspot.com/bug?extid=62ec8226f01cb4ca19d9 and QEMU
to verify my patch.

I applied the fix patch for the bug before my testing.

For testing, I set a hardware breakpoint at lan78xx_init_mac_address,
triggered the reproducer, and inspected the value of dev->chipid at
that point.

Without my patch, dev->chipid was always 0. With my patch, it matched
the upper 16 bits of the value read from the ID_REV register

Thanks
I Viswanath