linux-kernel - Re: [PATCH 1/1] tty: serial: handle HAS

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Message-Id: <30a38025-afae-4bdf-a468-21ae2cd5a7b3@app.fastmail.com>
Date: Mon, 25 Nov 2024 16:59:00 +0100
From: "Arnd Bergmann" <arnd@...nel.org>
To: "Andy Shevchenko" <andriy.shevchenko@...ux.intel.com>
Cc: "Guenter Roeck" <linux@...ck-us.net>,
 "Niklas Schnelle" <schnelle@...ux.ibm.com>,
 "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
 "Jiri Slaby" <jirislaby@...nel.org>,
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
 linux-serial@...r.kernel.org, "Heiko Carstens" <hca@...ux.ibm.com>,
 linux-kernel@...r.kernel.org, "Yang Yingliang" <yangyingliang@...wei.com>
Subject: Re: [PATCH 1/1] tty: serial: handle HAS_IOPORT dependencies

On Mon, Nov 25, 2024, at 12:06, Arnd Bergmann wrote:
> +unsigned int nr_uarts = ARRAY_SIZE(old_serial_port);;
> +

Unfortunately, this breaks on non-x86 because of the check
added in 59cfc45f17d6 ("serial: 8250: Do nothing if nr_uarts=0").

I still think it's the right idea, but need to unwind further
to make this possible, and find a different fix for the bug
from that commit.

      Arnd