HID: ntrig: explain firmware quirk

Commit 6549981bc54777c ("HID: fix N-trig touch panel with recent firmware")
adds a quirk that is needed for devices with more recent firmware so that
they become operational.

As it's not directly obvious from the code why is it needed, a comment
is worthwile.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/hid/hid-ntrig.c b/drivers/hid/hid-ntrig.c
index 513db0a47c4a..a418f9e19ce7 100644
--- a/drivers/hid/hid-ntrig.c
+++ b/drivers/hid/hid-ntrig.c
@@ -352,7 +352,8 @@ static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id)
                 }
         }
 
-        report = hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0x0a]; 
+        /* This is needed for devices with more recent firmware versions */
+        report = hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0x0a];
         if (report)
                 usbhid_submit_report(hdev, report, USB_DIR_OUT);