linux-kernel - [PATCH 2/9] staging: fsl-mc: fix device ref counting

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Date:   Wed, 1 Feb 2017 05:43:22 -0600
From:   <laurentiu.tudor@....com>
To:     <gregkh@...uxfoundation.org>
CC:     <devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>,
        <agraf@...e.de>, <arnd@...db.de>, <ioana.ciornei@....com>,
        <ruxandra.radulescu@....com>, <bharat.bhushan@....com>,
        <stuart.yoder@....com>, <catalin.horghidan@....com>,
        <leoyang.li@....com>, <roy.pledge@....com>,
        Laurentiu Tudor <laurentiu.tudor@....com>
Subject: [PATCH 2/9] staging: fsl-mc: fix device ref counting

From: Laurentiu Tudor <laurentiu.tudor@....com>

Drop unneeded get_device() call at device creation
and, as per documentation, drop reference count
after using device_find_child() return.

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@....com>
---
 drivers/staging/fsl-mc/bus/dprc-driver.c | 1 +
 drivers/staging/fsl-mc/bus/fsl-mc-bus.c  | 1 -
 2 files changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/fsl-mc/bus/dprc-driver.c b/drivers/staging/fsl-mc/bus/dprc-driver.c
index 4e416d8..e4b0341 100644
--- a/drivers/staging/fsl-mc/bus/dprc-driver.c
+++ b/drivers/staging/fsl-mc/bus/dprc-driver.c
@@ -188,6 +188,7 @@ static void dprc_add_new_devices(struct fsl_mc_device *mc_bus_dev,
 		child_dev = fsl_mc_device_lookup(obj_desc, mc_bus_dev);
 		if (child_dev) {
 			check_plugged_state_change(child_dev, obj_desc);
+			put_device(&child_dev->dev);
 			continue;
 		}
 
diff --git a/drivers/staging/fsl-mc/bus/fsl-mc-bus.c b/drivers/staging/fsl-mc/bus/fsl-mc-bus.c
index cc20dc4..7c6a43b 100644
--- a/drivers/staging/fsl-mc/bus/fsl-mc-bus.c
+++ b/drivers/staging/fsl-mc/bus/fsl-mc-bus.c
@@ -537,7 +537,6 @@ int fsl_mc_device_add(struct dprc_obj_desc *obj_desc,
 		goto error_cleanup_dev;
 	}
 
-	(void)get_device(&mc_dev->dev);
 	dev_dbg(parent_dev, "added %s\n", dev_name(&mc_dev->dev));
 
 	*new_mc_dev = mc_dev;
-- 
1.8.3.1