[PATCH 3.12 52/84] v4l: omap3isp: Fix sub-device power management code

From	Jiri Slaby <jslaby@suse.cz>
Newsgroups	linux.kernel
Subject	[PATCH 3.12 52/84] v4l: omap3isp: Fix sub-device power management code
Date	2015-10-02 15:30 +0200
Message-ID	<qf8zo-4Bq-13@gated-at.bofh.it> (permalink)
References	<qf8zn-4Bq-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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From: Sakari Ailus <sakari.ailus@iki.fi>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 9d39f05490115bf145e5ea03c0b7ec9d3d015b01 upstream.

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@iki.fi>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 drivers/media/platform/omap3isp/isp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c
index df3a0ec7fd2c..9dd0e0cc65cf 100644
--- a/drivers/media/platform/omap3isp/isp.c
+++ b/drivers/media/platform/omap3isp/isp.c
@@ -814,14 +814,14 @@ 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);
-- 
2.6.0

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[PATCH 3.12 52/84] v4l: omap3isp: Fix sub-device power management code Jiri Slaby <jslaby@suse.cz> - 2015-10-02 15:30 +0200

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