Input: Revert "wacom - testing result shows get_report is unnecessary."

This reverts commit 1b2faaf7e219fc2905d75afcd4c815e5d39eda80.

The Intuos4 series presents a bug in which it hangs if it receives
a set feature command while switching to the enhanced mode.
This bug is triggered when plugging an Intuos 4 while having
a gnome user session up and running.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Aristeu Rozanski <aris@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c
index 2c613cd41dd68260b345141489c7c06defd94f89..72b1724ac7d0a6291c0bae06c056207b98956758 100644 (file)
--- a/drivers/input/tablet/wacom_sys.c
+++ b/drivers/input/tablet/wacom_sys.c
@@ -536,6 +536,9 @@ static int wacom_set_device_mode(struct usb_interface *intf, int report_id, int
 
                error = wacom_set_report(intf, WAC_HID_FEATURE_REPORT,
                                         report_id, rep_data, length, 1);
+               if (error >= 0)
+                       error = wacom_get_report(intf, WAC_HID_FEATURE_REPORT,
+                                                report_id, rep_data, length, 1);
        } while ((error < 0 || rep_data[1] != mode) && limit++ < WAC_MSG_RETRIES);
 
        kfree(rep_data);