From: Ming Lei <ming.lei@canonical.com>
To: Scot Doyle <lkml14@scotdoyle.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>,
Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>,
David Daney <david.daney@cavium.com>,
Dann Frazier <dann.frazier@canonical.com>,
Jeremy Kerr <jk@ozlabs.org>,
Peter Hurley <peter@hurleysoftware.com>,
Pavel Machek <pavel@ucw.cz>, Jonathan Liu <net147@gmail.com>,
Alistair Popple <alistair@popple.id.au>,
Jean-Philippe Brucker <jean-philippe.brucker@arm.com>,
"Chintakuntla, Radha" <Radha.Chintakuntla@caviumnetworks.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jiri Slaby <jslaby@suse.com>, David Airlie <airlied@linux.ie>,
David Daney <ddaney.cavm@gmail.com>,
dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
stable <stable@vger.kernel.org>
Subject: Re: [PATCH] fbcon: warn on invalid cursor blink intervals
Date: Fri, 20 May 2016 10:17:08 +0800 [thread overview]
Message-ID: <CACVXFVM77CaHGE9kwhaxoa-fuNxZrDDzpCdHfnRno857pQANZQ@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.10.1605191726030.15478@laptop>
On Fri, May 20, 2016 at 6:31 AM, Scot Doyle <lkml14@scotdoyle.com> wrote:
> 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.
>
> [1] https://bugs.launchpad.net/bugs/1574814
>
> Suggested-by: David Daney <david.daney@cavium.com>
> Signed-off-by: Scot Doyle <lkml14@scotdoyle.com>
> Cc: <stable@vger.kernel.org> [v4.2]
Not sure this one is needed for stable because it justs dumps
a warning, and not set a valid period to ops->cur_blink_jiffies.
So I guess other fix patch is still required for the soft lockup issue, right?
Thanks,
> ---
> drivers/video/console/fbcon.c | 14 ++++++++++++--
> 1 file changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c
> index 6e92917..fad5b89 100644
> --- a/drivers/video/console/fbcon.c
> +++ b/drivers/video/console/fbcon.c
> @@ -1095,7 +1095,13 @@ static void fbcon_init(struct vc_data *vc, int init)
> con_copy_unimap(vc, svc);
>
> ops = info->fbcon_par;
> - ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
> +
> + if (vc->vc_cur_blink_ms >= 50)
> + ops->cur_blink_jiffies =
> + msecs_to_jiffies(vc->vc_cur_blink_ms);
> + else
> + WARN_ONCE(1, "blink interval < 50 ms");
> +
> p->con_rotate = initial_rotation;
> set_blitting_type(vc, info);
>
> @@ -1309,7 +1315,11 @@ static void fbcon_cursor(struct vc_data *vc, int mode)
> int y;
> int c = scr_readw((u16 *) vc->vc_pos);
>
> - ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
> + if (vc->vc_cur_blink_ms >= 50)
> + ops->cur_blink_jiffies =
> + msecs_to_jiffies(vc->vc_cur_blink_ms);
> + else
> + WARN_ONCE(1, "blink interval < 50 ms");
>
> if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
> return;
> --
> 2.1.4
>
next prev parent reply other threads:[~2016-05-20 2:17 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-17 18:41 [PATCH] tty: vt: Fix soft lockup in fbcon cursor blink timer David Daney
2016-05-17 20:49 ` Pavel Machek
2016-05-18 0:42 ` Ming Lei
2016-05-18 20:24 ` Scot Doyle
2016-05-18 20:38 ` David Daney
2016-05-19 4:21 ` [PATCH] fbcon: use default if cursor blink interval is not valid Scot Doyle
2016-05-19 7:25 ` Jeremy Kerr
2016-05-19 8:29 ` Ming Lei
2016-05-19 9:01 ` Pavel Machek
2016-05-19 14:22 ` Scot Doyle
2016-05-19 15:31 ` Ming Lei
2016-05-19 15:59 ` David Daney
2016-05-19 22:25 ` Scot Doyle
2016-05-19 22:31 ` [PATCH] fbcon: warn on invalid cursor blink intervals Scot Doyle
2016-05-19 22:50 ` David Daney
2016-05-20 1:21 ` Jeremy Kerr
2016-05-20 2:17 ` Ming Lei [this message]
2016-05-20 2:26 ` Jeremy Kerr
2016-05-20 2:48 ` Ming Lei
2016-05-20 5:04 ` Jeremy Kerr
2016-05-20 16:27 ` Scot Doyle
2016-05-24 1:19 ` Scot Doyle
2016-05-28 11:48 ` Henrique de Moraes Holschuh
2016-06-12 5:05 ` Chintakuntla, Radha
2016-05-28 11:45 ` Henrique de Moraes Holschuh
2016-05-19 0:27 ` [PATCH] tty: vt: Fix soft lockup in fbcon cursor blink timer Ming Lei
2016-05-19 7:08 ` Pavel Machek
2016-05-19 22:35 ` Scot Doyle
2016-05-28 11:44 ` Henrique de Moraes Holschuh
2016-06-14 16:22 ` Ping: " David Daney
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