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authorWei Yongjun <yongjun_wei@trendmicro.com.cn>2012-09-27 12:30:18 -0700
committerTony Luck <tony.luck@intel.com>2012-09-27 12:30:18 -0700
commit39c9a4ab2b91bff26801c86e423ef07fb705b3c0 (patch)
tree6923d05bc739e98c6af4f5e97d96c2aa4905c410 /arch/ia64/xen
parent0967237ca6521c63822340138e4d62ecf8a3d173 (diff)
[IA64] xen: Fix return value check in xencomm_vtop()
In case of error, the function follow_page() returns ERR_PTR() or NULL pointer. The NULL test in the error handling should be replaced with IS_ERR_OR_NULL(). dpatch engine is used to auto generated this patch. (https://github.com/weiyj/dpatch) Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/xen')
-rw-r--r--arch/ia64/xen/xencomm.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/ia64/xen/xencomm.c b/arch/ia64/xen/xencomm.c
index 1f5d7ac82e9..73d903ca2d6 100644
--- a/arch/ia64/xen/xencomm.c
+++ b/arch/ia64/xen/xencomm.c
@@ -17,6 +17,7 @@
*/
#include <linux/mm.h>
+#include <linux/err.h>
static unsigned long kernel_virtual_offset;
static int is_xencomm_initialized;
@@ -98,7 +99,7 @@ xencomm_vtop(unsigned long vaddr)
/* We assume the page is modified. */
page = follow_page(vma, vaddr, FOLL_WRITE | FOLL_TOUCH);
- if (!page)
+ if (IS_ERR_OR_NULL(page))
return ~0UL;
return (page_to_pfn(page) << PAGE_SHIFT) | (vaddr & ~PAGE_MASK);