staging: vchiq_2835_arm: Handle vmalloc_to_page error case

In case vmalloc_to_page returns NULL create_pagelist must abort
imediatly.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
index 8911e86..eeeee1b 100644 (file)
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_2835_arm.c
@@ -459,6 +459,11 @@ create_pagelist(char __user *buf, size_t count, unsigned short type,
                                                                 PAGE_SIZE));
                        size_t bytes = PAGE_SIZE - off;
 
+                       if (!pg) {
+                               cleanup_pagelistinfo(pagelistinfo);
+                               return NULL;
+                       }
+
                        if (bytes > length)
                                bytes = length;
                        pages[actual_pages] = pg;