From 9f563f1a2a4b448393159b3d526a6657dc4c0fce Mon Sep 17 00:00:00 2001
From: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Date: Thu, 7 Apr 2016 22:02:25 +0530
Subject: [PATCH] staging: android: ion: dummy: fix dereference of ERR_PTR

ion_device_create() can fail and if it fails then it returns the error
value in ERR_PTR.

Signed-off-by: Sudip Mukherjee <sudip.mukherjee@codethink.co.uk>
Reviewed-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/staging/android/ion/ion_dummy_driver.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/android/ion/ion_dummy_driver.c b/drivers/staging/android/ion/ion_dummy_driver.c
index 5678870bff48..814a3c92a56e 100644
--- a/drivers/staging/android/ion/ion_dummy_driver.c
+++ b/drivers/staging/android/ion/ion_dummy_driver.c
@@ -68,6 +68,8 @@ static int __init ion_dummy_init(void)
 	int i, err;
 
 	idev = ion_device_create(NULL);
+	if (IS_ERR(idev))
+		return PTR_ERR(idev);
 	heaps = kcalloc(dummy_ion_pdata.nr, sizeof(struct ion_heap *),
 			GFP_KERNEL);
 	if (!heaps)
-- 
2.20.1