Re: [PATCH] USB: serial: garmin_gps: remove some defined but not used variables

From: Johan Hovold
Date: Wed Apr 22 2020 - 03:49:07 EST


On Thu, Apr 09, 2020 at 04:51:43PM +0800, Jason Yan wrote:
> Fix the following gcc warning:
>
> drivers/usb/serial/garmin_gps.c:192:28: warning: âPRIVATE_REQâ defined
> but not used [-Wunused-const-variable=]
> static unsigned char const PRIVATE_REQ[]
> ^~~~~~~~~~~
> drivers/usb/serial/garmin_gps.c:186:28: warning: âGARMIN_STOP_PVT_REQâ
> defined but not used [-Wunused-const-variable=]
> static unsigned char const GARMIN_STOP_PVT_REQ[]
> ^~~~~~~~~~~~~~~~~~~
> drivers/usb/serial/garmin_gps.c:184:28: warning: âGARMIN_START_PVT_REQâ
> defined but not used [-Wunused-const-variable=]
> static unsigned char const GARMIN_START_PVT_REQ[]
> ^~~~~~~~~~~~~~~~~~~~
> drivers/usb/serial/garmin_gps.c:182:28: warning:
> âGARMIN_APP_LAYER_REPLYâ defined but not used [-Wunused-const-variable=]
> static unsigned char const GARMIN_APP_LAYER_REPLY[]
> ^~~~~~~~~~~~~~~~~~~~~~
>
> Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
> Signed-off-by: Jason Yan <yanaijie@xxxxxxxxxx>

You should mention that this is a W=1 one warning which isn't enabled
by default.

> ---
> drivers/usb/serial/garmin_gps.c | 9 ---------
> 1 file changed, 9 deletions(-)
>
> diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c
> index ffd984142171..3b39d1e39fbf 100644
> --- a/drivers/usb/serial/garmin_gps.c
> +++ b/drivers/usb/serial/garmin_gps.c
> @@ -179,19 +179,10 @@ static unsigned char const GARMIN_START_SESSION_REPLY[]
> = { 0, 0, 0, 0, 6, 0, 0, 0, 4, 0, 0, 0 };
> static unsigned char const GARMIN_BULK_IN_AVAIL_REPLY[]
> = { 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0 };
> -static unsigned char const GARMIN_APP_LAYER_REPLY[]
> - = { 0x14, 0, 0, 0 };
> -static unsigned char const GARMIN_START_PVT_REQ[]
> - = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 49, 0 };
> -static unsigned char const GARMIN_STOP_PVT_REQ[]
> - = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 50, 0 };
> static unsigned char const GARMIN_STOP_TRANSFER_REQ[]
> = { 20, 0, 0, 0, 10, 0, 0, 0, 2, 0, 0, 0, 0, 0 };
> static unsigned char const GARMIN_STOP_TRANSFER_REQ_V2[]
> = { 20, 0, 0, 0, 10, 0, 0, 0, 1, 0, 0, 0, 0 };
> -static unsigned char const PRIVATE_REQ[]
> - = { 0x4B, 0x6E, 0x10, 0x01, 0xFF, 0, 0, 0, 0xFF, 0, 0, 0 };
> -

I'm reluctant to simply remove these as they document the protocol
without any real downsides besides the W=1 warning.

Johan