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[3.16.y-ckt,stable] Patch "[media] smiapp: Take mutex during PLL update in sensor initialisation" has been added to staging queue

Message ID 1420626497-22564-1-git-send-email-luis.henriques@canonical.com
State New
Headers show

Commit Message

Luis Henriques Jan. 7, 2015, 10:28 a.m. UTC
This is a note to let you know that I have just added a patch titled

    [media] smiapp: Take mutex during PLL update in sensor initialisation

to the linux-3.16.y-queue branch of the 3.16.y-ckt extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.16.y-queue

This patch is scheduled to be released in version 3.16.7-ckt4.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.16.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Luis

------

From 8348c43d9d4bb59db02ce1e14c6929082f192aba Mon Sep 17 00:00:00 2001
From: Sakari Ailus <sakari.ailus@linux.intel.com>
Date: Tue, 16 Sep 2014 15:57:07 -0300
Subject: [media] smiapp: Take mutex during PLL update in sensor initialisation

commit f85698cd296f08218a7750f321e94607da128600 upstream.

The mutex does not serialise anything in this case but avoids a lockdep
warning from the control framework.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
 drivers/media/i2c/smiapp/smiapp-core.c | 2 ++
 1 file changed, 2 insertions(+)

--
2.1.4
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Patch

diff --git a/drivers/media/i2c/smiapp/smiapp-core.c b/drivers/media/i2c/smiapp/smiapp-core.c
index 698219a9e538..4fff7756bb7f 100644
--- a/drivers/media/i2c/smiapp/smiapp-core.c
+++ b/drivers/media/i2c/smiapp/smiapp-core.c
@@ -2625,7 +2625,9 @@  static int smiapp_registered(struct v4l2_subdev *subdev)
 		pll->flags |= SMIAPP_PLL_FLAG_NO_OP_CLOCKS;
 	pll->scale_n = sensor->limits[SMIAPP_LIMIT_SCALER_N_MIN];

+	mutex_lock(&sensor->mutex);
 	rval = smiapp_update_mode(sensor);
+	mutex_unlock(&sensor->mutex);
 	if (rval) {
 		dev_err(&client->dev, "update mode failed\n");
 		goto out_nvm_release;