linux-kernel - Re: [PATCH] 8250: option 'force

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Message-ID: <20160725174712.GA5752@kroah.com>
Date:	Mon, 25 Jul 2016 10:47:12 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Max Staudt <mstaudt@...e.de>
Cc:	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] 8250: option 'force_polling' for buggy IRQs

On Mon, Jul 25, 2016 at 07:36:15PM +0200, Max Staudt wrote:
> Some serial ports may not emit IRQs properly, or there may be a defect
> in their routing on the motherboard.
> 
> This patch allows these ports to be used anyway (or until a better
> workaround is known for a specific platform), though with no guarantees.
> 
> If you have such a buggy UART, boot Linux with 8250.force_polling=1 .

Ick, don't add new module parameters if at all possible.

> It is essentially the kernel level version of:
> 
>   setserial /dev/ttySn irq 0

Why can't you just do this instead?

thanks,

greg k-h