diff options
Diffstat (limited to 'drivers/hid/hidraw.c')
| -rw-r--r-- | drivers/hid/hidraw.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c index 7c47fc3f7b2..413a73187d3 100644 --- a/drivers/hid/hidraw.c +++ b/drivers/hid/hidraw.c @@ -57,10 +57,6 @@ static ssize_t hidraw_read(struct file *file, char __user *buffer, size_t count, set_current_state(TASK_INTERRUPTIBLE); while (list->head == list->tail) { - if (file->f_flags & O_NONBLOCK) { - ret = -EAGAIN; - break; - } if (signal_pending(current)) { ret = -ERESTARTSYS; break; @@ -69,6 +65,10 @@ static ssize_t hidraw_read(struct file *file, char __user *buffer, size_t count, ret = -EIO; break; } + if (file->f_flags & O_NONBLOCK) { + ret = -EAGAIN; + break; + } /* allow O_NONBLOCK to work well from other threads */ mutex_unlock(&list->read_mutex); @@ -295,6 +295,13 @@ out: } +static int hidraw_fasync(int fd, struct file *file, int on) +{ + struct hidraw_list *list = file->private_data; + + return fasync_helper(fd, file, on, &list->fasync); +} + static int hidraw_release(struct inode * inode, struct file * file) { unsigned int minor = iminor(inode); @@ -438,6 +445,7 @@ static const struct file_operations hidraw_ops = { .open = hidraw_open, .release = hidraw_release, .unlocked_ioctl = hidraw_ioctl, + .fasync = hidraw_fasync, #ifdef CONFIG_COMPAT .compat_ioctl = hidraw_ioctl, #endif |