From: Cyrill Gorcunov <gorcunov@gmail.com>

Adds checking of create_proc_entry call to prevent possible NULL pointer
usage.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Kumar Gala <galak@gate.crashing.org>
Cc: Brian Waite <waite@skycomputers.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/misc/hdpuftrs/hdpu_nexus.c |   14 ++++++++++++--
 1 files changed, 12 insertions(+), 2 deletions(-)

diff -puN drivers/misc/hdpuftrs/hdpu_nexus.c~sky-cpu-and-nexus-check-for-create_proc_entry-ret-code drivers/misc/hdpuftrs/hdpu_nexus.c
--- a/drivers/misc/hdpuftrs/hdpu_nexus.c~sky-cpu-and-nexus-check-for-create_proc_entry-ret-code
+++ a/drivers/misc/hdpuftrs/hdpu_nexus.c
@@ -78,10 +78,20 @@ static int hdpu_nexus_probe(struct platf
 	}
 
 	hdpu_slot_id = create_proc_entry("sky_slot_id", 0666, &proc_root);
-	hdpu_slot_id->read_proc = hdpu_slot_id_read;
+	if (!hdpu_slot_id) {
+		printk(KERN_WARNING "sky_nexus: "
+		       "Unable to create proc dir entry: sky_slot_id\n");
+	} else {
+		hdpu_slot_id->read_proc = hdpu_slot_id_read;
+	}
 
 	hdpu_chassis_id = create_proc_entry("sky_chassis_id", 0666, &proc_root);
-	hdpu_chassis_id->read_proc = hdpu_chassis_id_read;
+	if (!hdpu_chassis_id) {
+		printk(KERN_WARNING "sky_nexus: "
+		       "Unable to create proc dir entry: sky_chassis_id\n");
+	} else {
+		hdpu_chassis_id->read_proc = hdpu_chassis_id_read;
+	}
 
 	return 0;
 }
_