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>

2 files changed, 8 insertions, 0 deletions

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 04056773102e..fd1c4fe70327 100644
--- a/drivers/hid/hid-input.c
+++ b/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);
                 }
         }
 
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 0267aa5c1ea3..396068ccc197 100644
--- a/include/linux/hid.h
+++ b/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 {