[POWERPC] Sky Cpu and Nexus: check for create_proc_entry ret code

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>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 12 insertions, 2 deletions

diff --git a/drivers/misc/hdpuftrs/hdpu_nexus.c b/drivers/misc/hdpuftrs/hdpu_nexus.c
index 01bc9179603b..cc818532c7ec 100644
--- a/drivers/misc/hdpuftrs/hdpu_nexus.c
+++ b/drivers/misc/hdpuftrs/hdpu_nexus.c
@@ -78,10 +78,20 @@ static int hdpu_nexus_probe(struct platform_device *pdev)
         }
 
         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;
 }