HID: store the full list of reports in the hidinput

We were only storing the report in case of QUIRK_MULTI_INPUT.
It is interesting for the upcoming  HID_QUIRK_INPUT_PER_APP to also
store the full list of reports that are attached to it.

We need the full list because a device (Advanced Silicon has some)
might want to use a different report ID for the Input reports and
the Output reports. Storing the full list allows the drivers to
have all the data.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

drivers/hid/hid-input.c

@@ -1526,9 +1526,12 @@ static struct hid_input *hidinput_allocate(struct hid_device *hid)
 	input_dev->id.product = hid->product;
 	input_dev->id.version = hid->version;
 	input_dev->dev.parent = &hid->dev;
+
 	hidinput->input = input_dev;
 	list_add_tail(&hidinput->list, &hid->inputs);
 
+	INIT_LIST_HEAD(&hidinput->reports);
+
 	return hidinput;
 }
 
@@ -1678,6 +1681,9 @@ int hidinput_connect(struct hid_device *hid, unsigned int force)
 
 			if (hid->quirks & HID_QUIRK_MULTI_INPUT)
 				hidinput->report = report;
+
+			list_add_tail(&report->hidinput_list,
+				      &hidinput->reports);
 		}
 	}
 

include/linux/hid.h

@@ -464,6 +464,7 @@ struct hid_field {
 
 struct hid_report {
 	struct list_head list;
+	struct list_head hidinput_list;
 	unsigned id;					/* id of this report */
 	unsigned type;					/* report type */
 	struct hid_field *field[HID_MAX_FIELDS];	/* fields of the report */
@@ -510,6 +511,7 @@ struct hid_input {
 	struct hid_report *report;
 	struct input_dev *input;
 	bool registered;
+	struct list_head reports;	/* the list of reports */
 };
 
 enum hid_type {