sysfs: fix problems with binary files

[safe/jmp/linux-2.6] / fs / sysfs / bin.c

diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c
index 66f6e58..f2c478c 100644 (file)
--- a/fs/sysfs/bin.c
+++ b/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;