[PATCH 03/11] HID: hid-input: export hidinput_allocation function

[Benjamin Tissoires <benjamin.tissoires@gmail.com>]

During the probe, third party drivers can now safely create a new
input devices depending on the parsing of the reports descriptor.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
---
 drivers/hid/hid-input.c | 14 +++++++++++---
 include/linux/hid.h     |  1 +
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index eea02b0..b0572d0 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1163,7 +1163,7 @@ static void report_features(struct hid_device *hid)
 			}
 }
 
-static struct hid_input *hidinput_allocate(struct hid_device *hid)
+struct hid_input *hidinput_allocate(struct hid_device *hid)
 {
 	struct hid_input *hidinput = kzalloc(sizeof(*hidinput), GFP_KERNEL);
 	struct input_dev *input_dev = input_allocate_device();
@@ -1190,10 +1190,16 @@ static struct hid_input *hidinput_allocate(struct hid_device *hid)
 	input_dev->id.version = hid->version;
 	input_dev->dev.parent = hid->dev.parent;
 	hidinput->input = input_dev;
-	list_add_tail(&hidinput->list, &hid->inputs);
+	list_add(&hidinput->list, &hid->inputs);
 
 	return hidinput;
 }
+EXPORT_SYMBOL_GPL(hidinput_allocate);
+
+static struct hid_input *hid_get_latest_hidinput(struct hid_device *hid)
+{
+	return list_first_entry(&hid->inputs, struct hid_input, list);
+}
 
 /*
  * Register the input device; print a message.
@@ -1243,9 +1249,11 @@ int hidinput_connect(struct hid_device *hid, unsigned int force)
 			}
 
 			for (i = 0; i < report->maxfield; i++)
-				for (j = 0; j < report->field[i]->maxusage; j++)
+				for (j = 0; j < report->field[i]->maxusage; j++) {
+					hidinput = hid_get_latest_hidinput(hid);
 					hidinput_configure_usage(hidinput, report->field[i],
 								 report->field[i]->usage + j);
+				}
 
 			if (hid->quirks & HID_QUIRK_MULTI_INPUT) {
 				/* This will leave hidinput NULL, so that it
diff --git a/include/linux/hid.h b/include/linux/hid.h
index d2c42dd..42b02d6 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -701,6 +701,7 @@ extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct h
 extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
 extern int hidinput_connect(struct hid_device *hid, unsigned int force);
 extern void hidinput_disconnect(struct hid_device *);
+extern struct hid_input *hidinput_allocate(struct hid_device *hid);
 
 int hid_set_field(struct hid_field *, unsigned, __s32);
 int hid_input_report(struct hid_device *, int type, u8 *, int, int);
-- 
1.8.0