netdev - Re: [PATCH] can: mark expected switch fall-throughs

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Message-ID: <31d206cd-65f2-66be-ed79-583210a88d57@pengutronix.de>
Date:   Tue, 26 Feb 2019 09:02:17 +0100
From:   Marc Kleine-Budde <mkl@...gutronix.de>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Wolfgang Grandegger <wg@...ndegger.com>,
        "David S. Miller" <davem@...emloft.net>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Ludovic Desroches <ludovic.desroches@...rochip.com>
Cc:     linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] can: mark expected switch fall-throughs

On 1/29/19 7:06 PM, Gustavo A. R. Silva wrote:
> In preparation to enabling -Wimplicit-fallthrough, mark switch cases
> where we are expecting to fall through.
> 
> This patch fixes the following warnings:
> 
> drivers/net/can/peak_canfd/peak_pciefd_main.c:668:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/net/can/spi/mcp251x.c:875:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/net/can/usb/peak_usb/pcan_usb.c:422:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/net/can/at91_can.c:895:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/net/can/at91_can.c:953:15: warning: this statement may fall through [-Wimplicit-fallthrough=]
> drivers/net/can/usb/peak_usb/pcan_usb.c: In function ‘pcan_usb_decode_error’:
> drivers/net/can/usb/peak_usb/pcan_usb.c:422:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
>    if (n & PCAN_USB_ERROR_BUS_LIGHT) {
>       ^
> drivers/net/can/usb/peak_usb/pcan_usb.c:428:2: note: here
>   case CAN_STATE_ERROR_WARNING:
>   ^~~~
> 
> Warning level 3 was used: -Wimplicit-fallthrough=3
> 
> This patch is part of the ongoing efforts to enabling
> -Wimplicit-fallthrough.
> 
> Notice that in some cases spelling mistakes were fixed.
> In other cases, the /* fall through */ comment is placed
> at the bottom of the case statement, which is what GCC
> is expecting to find.
> 
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>

Added to linux-can-next.

Tnx
Marc

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