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

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Date:	Fri, 20 May 2016 09:21:58 +0800
From:	Jeremy Kerr <jk@...abs.org>
To:	Scot Doyle <lkml14@...tdoyle.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>
Cc:	David Daney <david.daney@...ium.com>,
	Ming Lei <ming.lei@...onical.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>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.com>, David Airlie <airlied@...ux.ie>,
	ddaney.cavm@...il.com, dri-devel@...ts.freedesktop.org,
	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH] fbcon: warn on invalid cursor blink intervals

Hi Scot,

> Two systems are locking on boot [1] because ops->cur_blink_jiffies
> is set to zero from vc->vc_cur_blink_ms.
> 
> Ignore such invalid intervals and log a warning.

This prevents a lockup on AST BMC machines, but (as expected) generates
a warning against the fbcon driver, which is a significantly better
result.

Tested-by: Jeremy Kerr <jk@...abs.org>

[now to sort out the issue in the ast driver...]

Cheers,


Jeremy