diff options
Diffstat (limited to 'drivers/hid/hid-emsff.c')
| -rw-r--r-- | drivers/hid/hid-emsff.c | 27 |
1 files changed, 11 insertions, 16 deletions
diff --git a/drivers/hid/hid-emsff.c b/drivers/hid/hid-emsff.c index d82d75bb11f7..60bfb6a924d7 100644 --- a/drivers/hid/hid-emsff.c +++ b/drivers/hid/hid-emsff.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Force feedback support for EMS Trio Linker Plus II * @@ -5,19 +6,6 @@ */ /* - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ @@ -59,13 +47,19 @@ static int emsff_init(struct hid_device *hid) { struct emsff_device *emsff; struct hid_report *report; - struct hid_input *hidinput = list_first_entry(&hid->inputs, - struct hid_input, list); + struct hid_input *hidinput; struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; - struct input_dev *dev = hidinput->input; + struct input_dev *dev; int error; + if (list_empty(&hid->inputs)) { + hid_err(hid, "no inputs found\n"); + return -ENODEV; + } + hidinput = list_first_entry(&hid->inputs, struct hid_input, list); + dev = hidinput->input; + if (list_empty(report_list)) { hid_err(hid, "no output reports found\n"); return -ENODEV; @@ -150,5 +144,6 @@ static struct hid_driver ems_driver = { }; module_hid_driver(ems_driver); +MODULE_DESCRIPTION("Force feedback support for EMS Trio Linker Plus II"); MODULE_LICENSE("GPL"); |