/* Device config is special, because it must work on
* an unconfigured device. */
if (cmd == COMEDI_DEVCONFIG) {
+ if (minor >= COMEDI_NUM_BOARD_MINORS) {
+ /* Device config not appropriate on non-board minors. */
+ rc = -ENOTTY;
+ goto done;
+ }
rc = do_devconfig_ioctl(dev,
(struct comedi_devconfig __user *)arg);
goto done;
if (ret == 0) {
if (!try_module_get(dev->driver->module)) {
comedi_device_detach(dev);
- return -ENOSYS;
+ ret = -ENOSYS;
}
}
ret = -EAGAIN;
break;
}
- ret = s->async->inttrig(dev, s, insn->data[0]);
+ ret = s->async->inttrig(dev, s, data[0]);
if (ret >= 0)
ret = 1;
break;
goto cleanup;
}
- kfree(async->cmd.chanlist);
async->cmd = user_cmd;
async->cmd.data = NULL;
/* load channel/gain list */
mask = 0;
read_subdev = comedi_get_read_subdevice(dev_file_info);
- if (read_subdev) {
+ if (read_subdev && read_subdev->async) {
poll_wait(file, &read_subdev->async->wait_head, wait);
if (!read_subdev->busy
|| comedi_buf_read_n_available(read_subdev->async) > 0
}
}
write_subdev = comedi_get_write_subdevice(dev_file_info);
- if (write_subdev) {
+ if (write_subdev && write_subdev->async) {
poll_wait(file, &write_subdev->async->wait_head, wait);
comedi_buf_write_alloc(write_subdev->async,
write_subdev->async->prealloc_bufsz);
}
s = comedi_get_write_subdevice(dev_file_info);
- if (s == NULL) {
+ if (s == NULL || s->async == NULL) {
retval = -EIO;
goto done;
}
}
s = comedi_get_read_subdevice(dev_file_info);
- if (s == NULL) {
+ if (s == NULL || s->async == NULL) {
retval = -EIO;
goto done;
}
if (async) {
comedi_reset_async_buf(async);
async->inttrig = NULL;
+ kfree(async->cmd.chanlist);
+ async->cmd.chanlist = NULL;
} else {
printk(KERN_ERR
"BUG: (?) do_become_nonbusy called with async=0\n");
kfree(info);
return -ENOMEM;
}
+ info->hardware_device = hardware_device;
comedi_device_init(info->device);
spin_lock_irqsave(&comedi_file_info_table_lock, flags);
for (i = 0; i < COMEDI_NUM_BOARD_MINORS; ++i) {
}
}
+int comedi_find_board_minor(struct device *hardware_device)
+{
+ int minor;
+ struct comedi_device_file_info *info;
+
+ for (minor = 0; minor < COMEDI_NUM_BOARD_MINORS; minor++) {
+ spin_lock(&comedi_file_info_table_lock);
+ info = comedi_file_info_table[minor];
+ if (info && info->hardware_device == hardware_device) {
+ spin_unlock(&comedi_file_info_table_lock);
+ return minor;
+ }
+ spin_unlock(&comedi_file_info_table_lock);
+ }
+ return -ENODEV;
+}
+
int comedi_alloc_subdevice_minor(struct comedi_device *dev,
struct comedi_subdevice *s)
{