[PATCH 3.2 080/152] usb: gadget: fsl_qe_udc: signedness bug in qe_get_frame()

[Ben Hutchings]

3.2.84-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

commit f4693b08cc901912a87369c46537b94ed4084ea0 upstream.

We can't assign -EINVAL to a u16.

Fixes: 3948f0e0c999 ('usb: add Freescale QE/CPM USB peripheral controller driver')
Acked-by: Peter Chen <peter.chen@xxxxxxx>
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx>
[bwh: Backported to 3.2: adjust filename]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 drivers/usb/gadget/fsl_qe_udc.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

--- a/drivers/usb/gadget/fsl_qe_udc.c
+++ b/drivers/usb/gadget/fsl_qe_udc.c
@@ -1883,11 +1883,8 @@ static int qe_get_frame(struct usb_gadge
 
 	tmp = in_be16(&udc_controller->usb_param->frame_n);
 	if (tmp & 0x8000)
-		tmp = tmp & 0x07ff;
-	else
-		tmp = -EINVAL;
-
-	return (int)tmp;
+		return tmp & 0x07ff;
+	return -EINVAL;
 }
 
 /* Tries to wake up the host connected to this gadget