Hi Greg,
On Fri, Sep 25, 2015 at 08:21:14PM -0700, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
>
> The patch below does not apply to the 3.10-stable tree.
> If someone wants it applied there, or to any other stable or longterm
> tree, then please email the backport, including the original git commit
> id to <stable@xxxxxxxxxxxxxxx>.
In this case it seems to have been me who determined the first kernel
version requiring this patch wrong. v3.10 is fine in this respect and does
not require the patch. (813f5c0ac5cc is only in v3.11.)
>
> thanks,
>
> greg k-h
>
> ------------------ original commit in Linus's tree ------------------
>
> From 9d39f05490115bf145e5ea03c0b7ec9d3d015b01 Mon Sep 17 00:00:00 2001
> From: Sakari Ailus <sakari.ailus@xxxxxx>
> Date: Fri, 12 Jun 2015 20:06:23 -0300
> Subject: [PATCH] [media] v4l: omap3isp: Fix sub-device power management code
>
> Commit 813f5c0ac5cc ("media: Change media device link_notify behaviour")
> modified the media controller link setup notification API and updated the
> OMAP3 ISP driver accordingly. As a side effect it introduced a bug by
> turning power on after setting the link instead of before. This results in
> sub-devices not being powered down in some cases when they should be. Fix
> it.
>
> Fixes: 813f5c0ac5cc [media] media: Change media device link_notify behaviour
>
> Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxx>
> Cc: stable@xxxxxxxxxxxxxxx # since v3.10
> Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
>
> diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c
> index d1334bb1fe37..12be830d704f 100644
> --- a/drivers/media/platform/omap3isp/isp.c
> +++ b/drivers/media/platform/omap3isp/isp.c
> @@ -829,14 +829,14 @@ static int isp_pipeline_link_notify(struct media_link *link, u32 flags,
> int ret;
>
> if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
> - !(link->flags & MEDIA_LNK_FL_ENABLED)) {
> + !(flags & MEDIA_LNK_FL_ENABLED)) {
> /* Powering off entities is assumed to never fail. */
> isp_pipeline_pm_power(source, -sink_use);
> isp_pipeline_pm_power(sink, -source_use);
> return 0;
> }
>
> - if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH &&
> + if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH &&
> (flags & MEDIA_LNK_FL_ENABLED)) {
>
> ret = isp_pipeline_pm_power(source, sink_use);
>
--
Kind regards,
Sakari Ailus
e-mail: sakari.ailus@xxxxxx XMPP: sailus@xxxxxxxxxxxxxx
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