linux-kernel - Re: [PATCH] fbcon: warn on invalid cursor blink intervals

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Date:	Mon, 23 May 2016 20:19:48 -0500 (CDT)
From:	Scot Doyle <lkml14@...tdoyle.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
cc:	Jeremy Kerr <jk@...abs.org>, Ming Lei <ming.lei@...onical.com>,
	David Daney <david.daney@...ium.com>,
	Dann Frazier <dann.frazier@...onical.com>,
	Peter Hurley <peter@...leysoftware.com>,
	Pavel Machek <pavel@....cz>, Jonathan Liu <net147@...il.com>,
	Alistair Popple <alistair@...ple.id.au>,
	Jean-Philippe Brucker <jean-philippe.brucker@....com>,
	"Chintakuntla, Radha" <Radha.Chintakuntla@...iumnetworks.com>,
	Jiri Slaby <jslaby@...e.com>, David Airlie <airlied@...ux.ie>,
	David Daney <ddaney.cavm@...il.com>,
	Scot Doyle <lkml14@...tdoyle.com>, fengguang.wu@...el.com,
	dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	stable <stable@...r.kernel.org>
Subject: Re: [PATCH] fbcon: warn on invalid cursor blink intervals

On Fri, 20 May 2016, Scot Doyle wrote:
> On Fri, 20 May 2016, Jeremy Kerr wrote:
> > Hi Ming,
> > 
> > >Then looks there are two fix patches acked & tested:
> > >
> > > - the patch in this thread
> > > - another one "[PATCH] tty: vt: Fix soft lockup in fbcon cursor
> > >blink timer."
> > > https://lkml.org/lkml/2016/5/17/455
> > >
> > >So which one will be pushed to linus?
> > 
> > Not that it's my call, but we may want both; the first as a safety
> > measure to prevent an invalid cur_blink_jiffies ever being set, and the
> > second one to actually fix the initialisation of vc_cur_blink_ms (and
> > address the warning introduced by the first).
> 
> Tomi / Greg,
> 
> I'd suggest
> - applying "tty: vt: Fix soft lockup in fbcon cursor blink timer." to 4.7 and stable[4.2]
> - applying "fbcon: warn on invalid cursor blink intervals" to 4.7
> - ignoring "fbcon: use default if cursor blink interval is not valid"
> 
> Note: the patches don't depend on each other

"tty: vt: Fix soft lockup..." should be applied first in order to avoid 
unnecessary reports due to the log warning in "fbcon: warn on invalid..."

> 
> > I guess we could just go with the latter for stable...
> >
> > Cheers,
> > 
> > Jeremy