2020-05-09 21:59:44

by Colin King

[permalink] [raw]
Subject: [PATCH] net: usb: qmi_wwan: remove redundant assignment to variable status

From: Colin Ian King <[email protected]>

The variable status is being initializeed with a value that is never read
and it is being updated later with a new value. The initialization
is redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <[email protected]>
---
drivers/net/usb/qmi_wwan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
index 4bb8552a00d3..b0eab6e5279d 100644
--- a/drivers/net/usb/qmi_wwan.c
+++ b/drivers/net/usb/qmi_wwan.c
@@ -719,7 +719,7 @@ static int qmi_wwan_change_dtr(struct usbnet *dev, bool on)

static int qmi_wwan_bind(struct usbnet *dev, struct usb_interface *intf)
{
- int status = -1;
+ int status;
u8 *buf = intf->cur_altsetting->extra;
int len = intf->cur_altsetting->extralen;
struct usb_interface_descriptor *desc = &intf->cur_altsetting->desc;
--
2.25.1


2020-05-10 07:43:15

by Bjørn Mork

[permalink] [raw]
Subject: Re: [PATCH] net: usb: qmi_wwan: remove redundant assignment to variable status

Colin King <[email protected]> writes:

> From: Colin Ian King <[email protected]>
>
> The variable status is being initializeed with a value that is never read
> and it is being updated later with a new value. The initialization
> is redundant and can be removed.
>
> Addresses-Coverity: ("Unused value")
> Signed-off-by: Colin Ian King <[email protected]>
> ---
> drivers/net/usb/qmi_wwan.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/usb/qmi_wwan.c b/drivers/net/usb/qmi_wwan.c
> index 4bb8552a00d3..b0eab6e5279d 100644
> --- a/drivers/net/usb/qmi_wwan.c
> +++ b/drivers/net/usb/qmi_wwan.c
> @@ -719,7 +719,7 @@ static int qmi_wwan_change_dtr(struct usbnet *dev, bool on)
>
> static int qmi_wwan_bind(struct usbnet *dev, struct usb_interface *intf)
> {
> - int status = -1;
> + int status;
> u8 *buf = intf->cur_altsetting->extra;
> int len = intf->cur_altsetting->extralen;
> struct usb_interface_descriptor *desc = &intf->cur_altsetting->desc;


Yes, looks like this initialization was made redundant when the CDC
descriptor parsing was moved to usbcore. Thanks.

Adding Fixes for documentation only, not as a stable hint. This is
cleanup only and not suitable for stable IMHO.

Acked-by: Bjørn Mork <[email protected]>
Fixes: 8492ed45aa5d ("qmi-wwan: use common parser")

2020-05-10 18:16:28

by Jakub Kicinski

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Subject: Re: [PATCH] net: usb: qmi_wwan: remove redundant assignment to variable status

On Sat, 9 May 2020 22:57:56 +0100 Colin King wrote:
> From: Colin Ian King <[email protected]>
>
> The variable status is being initializeed with a value that is never read
> and it is being updated later with a new value. The initialization
> is redundant and can be removed.
>
> Addresses-Coverity: ("Unused value")
> Signed-off-by: Colin Ian King <[email protected]>

Applied the 3 fixes from Saturday to net-next, thanks.