commit 9cc712efc708bf2d25b6a6c013c66c42f2cfccd0
author José Adolfo Galdámez <josegalre@pac-rom.com> Wed Oct 21 21:52:13 2015 -0600
committer William Bellavance <flintman@flintmancomputers.com> Wed Feb 10 20:04:59 2016 -0500
tree f4b7b9d2354b77f6a63eacded1c5b32282c18abc
parent 64c363146fe8b4b26285d36fad0fc01b9c8c1285

Merge tag 'v3.4.110' into mm-6.0

Change-Id: I0afc69bce474139d1b70e062d72c0b8054529833
Signed-off-by: José Adolfo Galdámez <josegalre@pac-rom.com>

drivers/mtd/mtd_blkdevs.c

diff --git a/drivers/mtd/mtd_blkdevs.c b/drivers/mtd/mtd_blkdevs.c
index 11c9dce..65dd2fd 100644
--- a/drivers/mtd/mtd_blkdevs.c
+++ b/drivers/mtd/mtd_blkdevs.c
@@ -214,6 +214,7 @@
 		return -ERESTARTSYS; /* FIXME: busy loop! -arnd*/
 
 	mutex_lock(&dev->lock);
+	mutex_lock(&mtd_table_mutex);
 
 	if (dev->open)
 		goto unlock;
@@ -237,6 +238,7 @@
 
 unlock:
 	dev->open++;
+	mutex_unlock(&mtd_table_mutex);
 	mutex_unlock(&dev->lock);
 	blktrans_dev_put(dev);
 	return ret;
@@ -247,6 +249,7 @@
 error_put:
 	module_put(dev->tr->owner);
 	kref_put(&dev->ref, blktrans_dev_release);
+	mutex_unlock(&mtd_table_mutex);
 	mutex_unlock(&dev->lock);
 	blktrans_dev_put(dev);
 	return ret;
@@ -261,6 +264,7 @@
 		return ret;
 
 	mutex_lock(&dev->lock);
+	mutex_lock(&mtd_table_mutex);
 
 	if (--dev->open)
 		goto unlock;
@@ -273,6 +277,7 @@
 		__put_mtd_device(dev->mtd);
 	}
 unlock:
+	mutex_unlock(&mtd_table_mutex);
 	mutex_unlock(&dev->lock);
 	blktrans_dev_put(dev);
 	return ret;