From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Tue, 2 Feb 2016 21:13:58 +0000 (-0700)
Subject: coresight: release reference taken by 'bus_find_device()'
X-Git-Tag: firefly_0821_release~176^2~4^2~44^2~79
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f03467661ca82e16b05e786c893bb4cb89951ca3;p=firefly-linux-kernel-4.4.55.git

coresight: release reference taken by 'bus_find_device()'

The reference count taken by function bus_find_device() needs
to be released if a child device is found, something this patch
is adding.

Reported-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit f2dfab3568fc32afeac8b698481e80e7ab2dc658)
---

diff --git a/drivers/hwtracing/coresight/coresight.c b/drivers/hwtracing/coresight/coresight.c
index 8872db4410eb..a35ca54a76c9 100644
--- a/drivers/hwtracing/coresight/coresight.c
+++ b/drivers/hwtracing/coresight/coresight.c
@@ -570,6 +570,8 @@ static void coresight_fixup_device_conns(struct coresight_device *csdev)
 
 		if (dev) {
 			conn->child_dev = to_coresight_device(dev);
+			/* and put reference from 'bus_find_device()' */
+			put_device(dev);
 		} else {
 			csdev->orphan = true;
 			conn->child_dev = NULL;