[patch] usb: gadget: fsl_qe_udc: signedness bug in qe_get_frame()

Subsystems: freescale usb peripheral drivers, the rest, usb subsystem

STALE3672d

2 messages, 2 authors, 2016-07-18 · open the first message on its own page

[patch] usb: gadget: fsl_qe_udc: signedness bug in qe_get_frame()

From: Dan Carpenter <hidden>
Date: 2016-07-15 11:16:10

We can't assign -EINVAL to a u16.

Fixes: 3948f0e0c999 ('usb: add Freescale QE/CPM USB peripheral controller driver')
Signed-off-by: Dan Carpenter <redacted>
diff --git a/drivers/usb/gadget/udc/fsl_qe_udc.c b/drivers/usb/gadget/udc/fsl_qe_udc.c
index 93d28cb..901366f 100644
--- a/drivers/usb/gadget/udc/fsl_qe_udc.c
+++ b/drivers/usb/gadget/udc/fsl_qe_udc.c
@@ -1878,11 +1878,8 @@ static int qe_get_frame(struct usb_gadget *gadget)
 
 	tmp = in_be16(&udc->usb_param->frame_n);
 	if (tmp & 0x8000)
-		tmp = tmp & 0x07ff;
-	else
-		tmp = -EINVAL;
-
-	return (int)tmp;
+		return tmp & 0x07ff;
+	return -EINVAL;
 }
 
 static int fsl_qe_start(struct usb_gadget *gadget,

Re: [patch] usb: gadget: fsl_qe_udc: signedness bug in qe_get_frame()

From: Peter Chen <hidden>
Date: 2016-07-18 01:59:23

On Fri, Jul 15, 2016 at 02:15:47PM +0300, Dan Carpenter wrote:
quoted hunk
We can't assign -EINVAL to a u16.

Fixes: 3948f0e0c999 ('usb: add Freescale QE/CPM USB peripheral controller driver')
Signed-off-by: Dan Carpenter <redacted>
diff --git a/drivers/usb/gadget/udc/fsl_qe_udc.c b/drivers/usb/gadget/udc/fsl_qe_udc.c
index 93d28cb..901366f 100644
--- a/drivers/usb/gadget/udc/fsl_qe_udc.c
+++ b/drivers/usb/gadget/udc/fsl_qe_udc.c
@@ -1878,11 +1878,8 @@ static int qe_get_frame(struct usb_gadget *gadget)
 
 	tmp = in_be16(&udc->usb_param->frame_n);
 	if (tmp & 0x8000)
-		tmp = tmp & 0x07ff;
-	else
-		tmp = -EINVAL;
-
-	return (int)tmp;
+		return tmp & 0x07ff;
+	return -EINVAL;
 }
Acked-by: Peter Chen <redacted>
 
 static int fsl_qe_start(struct usb_gadget *gadget,
--
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-- 

Best Regards,
Peter Chen
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