From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Subject: Re: [PATCH] 8250: option 'force_polling' for buggy IRQs Date: Mon, 25 Jul 2016 10:47:12 -0700 Message-ID: <20160725174712.GA5752@kroah.com> References: <1469468175-15704-1-git-send-email-mstaudt@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1469468175-15704-1-git-send-email-mstaudt@suse.de> Sender: linux-kernel-owner@vger.kernel.org To: Max Staudt Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-serial@vger.kernel.org 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