linux-kernel - Re: [PATCH net-next 1/5] misdn: avoid -Wempty-body warning

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Message-ID: <YFh3heNXq6mqYqzI@unreal>
Date:   Mon, 22 Mar 2021 12:55:01 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     netdev@...r.kernel.org, Karsten Keil <isdn@...ux-pingi.de>,
        Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 1/5] misdn: avoid -Wempty-body warning

On Mon, Mar 22, 2021 at 11:43:31AM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> gcc warns about a pointless condition:
> 
> drivers/isdn/hardware/mISDN/hfcmulti.c: In function 'hfcmulti_interrupt':
> drivers/isdn/hardware/mISDN/hfcmulti.c:2752:17: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body]
>  2752 |                 ; /* external IRQ */
> 
> Change this as suggested by gcc, which also fits the style of the
> other conditions in this function.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  drivers/isdn/hardware/mISDN/hfcmulti.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c
> index 7013a3f08429..8ab0fde758d2 100644
> --- a/drivers/isdn/hardware/mISDN/hfcmulti.c
> +++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
> @@ -2748,8 +2748,9 @@ hfcmulti_interrupt(int intno, void *dev_id)
>  		if (hc->ctype != HFC_TYPE_E1)
>  			ph_state_irq(hc, r_irq_statech);
>  	}
> -	if (status & V_EXT_IRQSTA)
> -		; /* external IRQ */
> +	if (status & V_EXT_IRQSTA) {
> +		/* external IRQ */
> +	}

Any reason do not delete this hunk?

>  	if (status & V_LOST_STA) {
>  		/* LOST IRQ */
>  		HFC_outb(hc, R_INC_RES_FIFO, V_RES_LOST); /* clear irq! */
> -- 
> 2.29.2
>