diff options
| -rw-r--r-- | drivers/hid/hidraw.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c index cdd136942bc..3b53475a2b3 100644 --- a/drivers/hid/hidraw.c +++ b/drivers/hid/hidraw.c @@ -237,11 +237,16 @@ static long hidraw_ioctl(struct file *file, unsigned int cmd, struct inode *inode = file->f_path.dentry->d_inode; unsigned int minor = iminor(inode); long ret = 0; - /* FIXME: What stops hidraw_table going NULL */ - struct hidraw *dev = hidraw_table[minor]; + struct hidraw *dev; void __user *user_arg = (void __user*) arg; lock_kernel(); + dev = hidraw_table[minor]; + if (!dev) { + ret = -ENODEV; + goto out; + } + switch (cmd) { case HIDIOCGRDESCSIZE: if (put_user(dev->hid->rsize, (int __user *)arg)) @@ -314,6 +319,7 @@ static long hidraw_ioctl(struct file *file, unsigned int cmd, ret = -ENOTTY; } +out: unlock_kernel(); return ret; } |