HID: core: remove the need for HID_QUIRK_NO_EMPTY_INPUT

There is no real point of registering an empty input node.
This should be default, but given some drivers need the blank input
node to set it up during input_configured, we need to postpone
the check for hidinput_has_been_populated().

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Acked-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

5 files changed, 7 insertions, 10 deletions

diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c
index 88b9703318e4..cc738ebf93ac 100644
--- a/drivers/hid/hid-asus.c
+++ b/drivers/hid/hid-asus.c
@@ -644,8 +644,7 @@ static int asus_probe(struct hid_device *hdev, const struct hid_device_id *id)
                  * All functionality is on a single HID interface and for
                  * userspace the touchpad must be a separate input_dev.
                  */
-                hdev->quirks |= HID_QUIRK_MULTI_INPUT |
-                                HID_QUIRK_NO_EMPTY_INPUT;
+                hdev->quirks |= HID_QUIRK_MULTI_INPUT;
                 drvdata->tp = &asus_t100chi_tp;
         }
 
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 04d01b57d94c..b237b5590227 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1656,16 +1656,16 @@ int hidinput_connect(struct hid_device *hid, unsigned int force)
         }
 
         list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
-                if ((hid->quirks & HID_QUIRK_NO_EMPTY_INPUT) &&
-                    !hidinput_has_been_populated(hidinput)) {
+                if (drv->input_configured &&
+                    drv->input_configured(hid, hidinput))
+                        goto out_unwind;
+
+                if (!hidinput_has_been_populated(hidinput)) {
                         /* no need to register an input device not populated */
                         hidinput_cleanup_hidinput(hid, hidinput);
                         continue;
                 }
 
-                if (drv->input_configured &&
-                    drv->input_configured(hid, hidinput))
-                        goto out_unwind;
                 if (input_register_device(hidinput->input))
                         goto out_unwind;
                 hidinput->registered = true;
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index bc724e6b75c9..c4d89830cd1f 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -1469,7 +1469,6 @@ static int mt_probe(struct hid_device *hdev, const struct hid_device_id *id)
          * device.
          */
         hdev->quirks |= HID_QUIRK_MULTI_INPUT;
-        hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
 
         /*
          * Some multitouch screens do not like to be polled for input
diff --git a/drivers/hid/hid-uclogic.c b/drivers/hid/hid-uclogic.c
index e3e6e5c893cc..56b196d60041 100644
--- a/drivers/hid/hid-uclogic.c
+++ b/drivers/hid/hid-uclogic.c
@@ -946,7 +946,6 @@ static int uclogic_probe(struct hid_device *hdev,
          * than the pen, so use QUIRK_MULTI_INPUT for all tablets.
          */
         hdev->quirks |= HID_QUIRK_MULTI_INPUT;
-        hdev->quirks |= HID_QUIRK_NO_EMPTY_INPUT;
 
         /* Allocate and assign driver data */
         drvdata = devm_kzalloc(&hdev->dev, sizeof(*drvdata), GFP_KERNEL);
diff --git a/include/linux/hid.h b/include/linux/hid.h
index bc92005e5f08..b0db16fa7093 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -338,7 +338,7 @@ struct hid_item {
 #define HID_QUIRK_BADPAD                        BIT(5)
 #define HID_QUIRK_MULTI_INPUT                   BIT(6)
 #define HID_QUIRK_HIDINPUT_FORCE                BIT(7)
-#define HID_QUIRK_NO_EMPTY_INPUT                BIT(8)
+/* BIT(8) reserved for backward compatibility, was HID_QUIRK_NO_EMPTY_INPUT */
 /* BIT(9) reserved for backward compatibility, was NO_INIT_INPUT_REPORTS */
 #define HID_QUIRK_ALWAYS_POLL                   BIT(10)
 #define HID_QUIRK_SKIP_OUTPUT_REPORTS           BIT(16)