diff options
Diffstat (limited to 'drivers/input/evdev.c')
| -rw-r--r-- | drivers/input/evdev.c | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index 95f90699d2b1..90ff6be85cf4 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -50,7 +50,7 @@ struct evdev_client { bool revoked; unsigned long *evmasks[EV_CNT]; unsigned int bufsize; - struct input_event buffer[]; + struct input_event buffer[] __counted_by(bufsize); }; static size_t evdev_get_mask_cnt(unsigned int type) @@ -288,8 +288,8 @@ static void evdev_pass_values(struct evdev_client *client, /* * Pass incoming events to all connected clients. */ -static void evdev_events(struct input_handle *handle, - const struct input_value *vals, unsigned int count) +static unsigned int evdev_events(struct input_handle *handle, + struct input_value *vals, unsigned int count) { struct evdev *evdev = handle->private; struct evdev_client *client; @@ -306,17 +306,8 @@ static void evdev_events(struct input_handle *handle, evdev_pass_values(client, vals, count, ev_time); rcu_read_unlock(); -} - -/* - * Pass incoming event to all connected clients. - */ -static void evdev_event(struct input_handle *handle, - unsigned int type, unsigned int code, int value) -{ - struct input_value vals[] = { { type, code, value } }; - evdev_events(handle, vals, 1); + return count; } static int evdev_fasync(int fd, struct file *file, int on) @@ -507,6 +498,13 @@ static ssize_t evdev_write(struct file *file, const char __user *buffer, struct input_event event; int retval = 0; + /* + * Limit amount of data we inject into the input subsystem so that + * we do not hold evdev->mutex for too long. 4096 bytes corresponds + * to 170 input events. + */ + count = min(count, 4096); + if (count != 0 && count < input_event_size()) return -EINVAL; @@ -1301,7 +1299,6 @@ static const struct file_operations evdev_fops = { .compat_ioctl = evdev_ioctl_compat, #endif .fasync = evdev_fasync, - .llseek = no_llseek, }; /* @@ -1411,14 +1408,17 @@ static void evdev_disconnect(struct input_handle *handle) } static const struct input_device_id evdev_ids[] = { - { .driver_info = 1 }, /* Matches all devices */ - { }, /* Terminating zero entry */ + { + /* Matches all devices */ + .flags = INPUT_DEVICE_ID_MATCH_EVBIT, + .evbit = { BIT_MASK(EV_SYN) }, + }, + { } /* Terminating zero entry */ }; MODULE_DEVICE_TABLE(input, evdev_ids); static struct input_handler evdev_handler = { - .event = evdev_event, .events = evdev_events, .connect = evdev_connect, .disconnect = evdev_disconnect, |