diff options
Diffstat (limited to 'drivers/input/evdev.c')
| -rw-r--r-- | drivers/input/evdev.c | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index 4cf25347b015..76457d50bc34 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -369,7 +369,7 @@ static int evdev_fetch_next_event(struct evdev_client *client, spin_lock_irq(&client->buffer_lock); - have_event = client->head != client->tail; + have_event = client->packet_head != client->tail; if (have_event) { *event = client->buffer[client->tail++]; client->tail &= client->bufsize - 1; @@ -391,14 +391,13 @@ static ssize_t evdev_read(struct file *file, char __user *buffer, if (count < input_event_size()) return -EINVAL; - if (client->packet_head == client->tail && evdev->exist && - (file->f_flags & O_NONBLOCK)) - return -EAGAIN; - - retval = wait_event_interruptible(evdev->wait, - client->packet_head != client->tail || !evdev->exist); - if (retval) - return retval; + if (!(file->f_flags & O_NONBLOCK)) { + retval = wait_event_interruptible(evdev->wait, + client->packet_head != client->tail || + !evdev->exist); + if (retval) + return retval; + } if (!evdev->exist) return -ENODEV; @@ -412,6 +411,9 @@ static ssize_t evdev_read(struct file *file, char __user *buffer, retval += input_event_size(); } + if (retval == 0 && (file->f_flags & O_NONBLOCK)) + return -EAGAIN; + return retval; } |