[PATCH] fix create_write_pipe() error check

[Akinobu Mita]

The return value of create_write_pipe()/create_read_pipe() should be
checked by IS_ERR().

Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>

---
 kernel/kmod.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Index: work-fault-inject/kernel/kmod.c
===================================================================
--- work-fault-inject.orig/kernel/kmod.c
+++ work-fault-inject/kernel/kmod.c
@@ -307,14 +307,14 @@ int call_usermodehelper_pipe(char *path,
 		return 0;
 
 	f = create_write_pipe();
-	if (!f)
-		return -ENOMEM;
+	if (IS_ERR(f))
+		return PTR_ERR(f);
 	*filp = f;
 
 	f = create_read_pipe(f);
-	if (!f) {
+	if (IS_ERR(f)) {
 		free_write_pipe(*filp);
-		return -ENOMEM;
+		return PTR_ERR(f);
 	}
 	sub_info.stdin = f;
 
-
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