From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
To: "Gustavo A. R. Silva" <gustavo@embeddedor.com>,
Wolfgang Grandegger <wg@grandegger.com>,
Marc Kleine-Budde <mkl@pengutronix.de>,
"David S. Miller" <davem@davemloft.net>,
Nicolas Ferre <nicolas.ferre@microchip.com>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Ludovic Desroches <ludovic.desroches@microchip.com>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, linux-can@vger.kernel.org
Subject: Re: [PATCH][next] can: at91_can: mark expected switch fall-throughs
Date: Fri, 8 Feb 2019 21:55:26 +0300 [thread overview]
Message-ID: <8402d6f6-dff1-eb99-3bd1-051b4f6f24f0@cogentembedded.com> (raw)
In-Reply-To: <20190208184444.GA28484@embeddedor>
Hello!
On 02/08/2019 09:44 PM, Gustavo A. R. Silva wrote:
> In preparation to enabling -Wimplicit-fallthrough, mark switch
> cases where we are expecting to fall through.
>
> Notice that, in this particular case, the /* fall through */
> comments are placed at the bottom of the case statement, which
> is what GCC is expecting to find.
>
> Warning level 3 was used: -Wimplicit-fallthrough=3
>
> This patch is part of the ongoing efforts to enabling
> -Wimplicit-fallthrough.
>
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
> ---
> drivers/net/can/at91_can.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c
> index d98c69045b17..1718c20f9c99 100644
> --- a/drivers/net/can/at91_can.c
> +++ b/drivers/net/can/at91_can.c
> @@ -902,7 +902,8 @@ static void at91_irq_err_state(struct net_device *dev,
> CAN_ERR_CRTL_TX_WARNING :
> CAN_ERR_CRTL_RX_WARNING;
> }
> - case CAN_STATE_ERROR_WARNING: /* fallthrough */
> + /* fall through */
Why do we need this comment at all? Just remove it, that's all.
> + case CAN_STATE_ERROR_WARNING:
> /*
> * from: ERROR_ACTIVE, ERROR_WARNING
> * to : ERROR_PASSIVE, BUS_OFF
> @@ -951,7 +952,8 @@ static void at91_irq_err_state(struct net_device *dev,
> netdev_dbg(dev, "Error Active\n");
> cf->can_id |= CAN_ERR_PROT;
> cf->data[2] = CAN_ERR_PROT_ACTIVE;
> - case CAN_STATE_ERROR_WARNING: /* fallthrough */
> + /* fall through */
Again, we don;t need it here.
> + case CAN_STATE_ERROR_WARNING:
> reg_idr = AT91_IRQ_ERRA | AT91_IRQ_WARN | AT91_IRQ_BOFF;
> reg_ier = AT91_IRQ_ERRP;
> break;
MBR, Serfei
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next prev parent reply other threads:[~2019-02-08 18:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-08 18:44 [PATCH][next] can: at91_can: mark expected switch fall-throughs Gustavo A. R. Silva
2019-02-08 18:55 ` Sergei Shtylyov [this message]
2019-02-09 19:17 ` Sergei Shtylyov
2019-02-11 9:03 ` Nicolas.Ferre
2019-02-14 21:33 ` Gustavo A. R. Silva
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