[PATCH] USB: fix usb wacom tablet driver bug

This patch fixes bug 4905 and a Cintiq 21UX bug.

Signed-off-by: Ping Cheng <pingc@wacom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 10 insertions, 11 deletions

diff --git a/drivers/usb/input/wacom.c b/drivers/usb/input/wacom.c
index 02412e31a46b..3b266af3048a 100644
--- a/drivers/usb/input/wacom.c
+++ b/drivers/usb/input/wacom.c
@@ -342,9 +342,6 @@ static void wacom_graphire_irq(struct urb *urb, struct pt_regs *regs)
                 goto exit;
         }
 
-        x = le16_to_cpu(*(__le16 *) &data[2]);
-        y = le16_to_cpu(*(__le16 *) &data[4]);
-
         input_regs(dev, regs);
 
         if (data[1] & 0x10) { /* in prox */
@@ -373,15 +370,17 @@ static void wacom_graphire_irq(struct urb *urb, struct pt_regs *regs)
                 }
         }
 
-        if (data[1] & 0x80) {
+        if (data[1] & 0x90) {
+                x = le16_to_cpu(*(__le16 *) &data[2]);
+                y = le16_to_cpu(*(__le16 *) &data[4]);
                 input_report_abs(dev, ABS_X, x);
                 input_report_abs(dev, ABS_Y, y);
-        }
-        if (wacom->tool[0] != BTN_TOOL_MOUSE) {
-                input_report_abs(dev, ABS_PRESSURE, le16_to_cpu(*(__le16 *) &data[6]));
-                input_report_key(dev, BTN_TOUCH, data[1] & 0x01);
-                input_report_key(dev, BTN_STYLUS, data[1] & 0x02);
-                input_report_key(dev, BTN_STYLUS2, data[1] & 0x04);
+                if (wacom->tool[0] != BTN_TOOL_MOUSE) {
+                        input_report_abs(dev, ABS_PRESSURE, le16_to_cpu(*(__le16 *) &data[6]));
+                        input_report_key(dev, BTN_TOUCH, data[1] & 0x01);
+                        input_report_key(dev, BTN_STYLUS, data[1] & 0x02);
+                        input_report_key(dev, BTN_STYLUS2, data[1] & 0x04);
+                }
         }
 
         input_report_key(dev, wacom->tool[0], data[1] & 0x10);
@@ -568,7 +567,7 @@ static void wacom_intuos_irq(struct urb *urb, struct pt_regs *regs)
 
         /* Cintiq doesn't send data when RDY bit isn't set */
         if ((wacom->features->type == CINTIQ) && !(data[1] & 0x40))
-                return;
+                goto exit;
 
         if (wacom->features->type >= INTUOS3) {
                 input_report_abs(dev, ABS_X, (data[2] << 9) | (data[3] << 1) | ((data[9] >> 1) & 1));