diff --git a/[refs] b/[refs]
index 189ea046bb9c..d7699a520f6d 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 72638f598ec9f05a43fcb22dc1dd8dc34c43acc1
+refs/heads/master: 4503efd0891c40e30928afb4b23dc3f99c62a6b2
diff --git a/trunk/fs/sysfs/bin.c b/trunk/fs/sysfs/bin.c
index 66f6e58a7e4b..f2c478c3424e 100644
--- a/trunk/fs/sysfs/bin.c
+++ b/trunk/fs/sysfs/bin.c
@@ -63,6 +63,9 @@ read(struct file *file, char __user *userbuf, size_t bytes, loff_t *off)
 	int count = min_t(size_t, bytes, PAGE_SIZE);
 	char *temp;
 
+	if (!bytes)
+		return 0;
+
 	if (size) {
 		if (offs > size)
 			return 0;
@@ -131,6 +134,9 @@ static ssize_t write(struct file *file, const char __user *userbuf,
 	int count = min_t(size_t, bytes, PAGE_SIZE);
 	char *temp;
 
+	if (!bytes)
+		return 0;
+
 	if (size) {
 		if (offs > size)
 			return 0;