linux-kernel - Re: [PATCH] serial: uart: add hw flow control support configuration

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Message-ID: <20140412175812.107ecbdf@alan.etchedpixels.co.uk>
Date:	Sat, 12 Apr 2014 17:58:12 +0100
From:	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>
To:	Murali Karicheri <m-karicheri2@...com>
Cc:	<devicetree@...r.kernel.org>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-serial@...r.kernel.org>,
	<balbi@...com>, Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Randy Dunlap <rdunlap@...radead.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>
Subject: Re: [PATCH] serial: uart: add hw flow control support configuration

> not needed if hw has flow control capabilities. This patch adds a
> DT attribute for enabling hw flow control for a uart port. Also skip
> stop and start if this flag is present in flag field of the port
> structure.

That seems a sensible thing to add.

> -	if (up->capabilities & UART_CAP_AFE && port->fifosize >= 32) {
> +	if ((up->capabilities & UART_CAP_AFE && (port->fifosize >= 32)) ||
> +	    port->flags & UPF_HARD_FLOW) {

Surely you want brackets on the port->flags & UPF_HARD_FLOW ??

Alan
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