[PATCH F19 F20 Rawhide] Revert "Input: wacom - testing result shows get_report is unnecessary."

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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@xxxxxxxxxx>
Signed-off-by: Aristeu Rozanski <aris@xxxxxxxxxx>
---

Hi,

This patch is on its way upstream (it has been submitted to the list):
http://www.spinics.net/lists/linux-input/msg31843.html

I already received a complain from Bastien that his Wacom was broken in F20,
so having this in F20 and rawhide would help the Intuos 4 users.

The regression has been introduced in the kernel v3.12, so F19, F20 and rawhide
are impacted.

Cheers,
Benjamin

 drivers/input/tablet/wacom_sys.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c
index 852ce9d..afa4e8d 100644
--- 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);
-- 
1.9.3

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