HID: ite: Add USB id match for Acer SW5-012 keyboard dock

[mirror_ubuntu-bionic-kernel.git] / drivers / hid / hid-emsff.c

diff --git a/drivers/hid/hid-emsff.c b/drivers/hid/hid-emsff.c
index d82d75bb11f78b591483233bc294aaf3a5939a72..80f9a02dfa69b212b523a9e19a724a14c9edf3a2 100644 (file)
--- a/drivers/hid/hid-emsff.c
+++ b/drivers/hid/hid-emsff.c
@@ -59,13 +59,19 @@ 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;