linux-kernel - Re: [PATCH] mfd: ucb1x00: remove NO

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Date:   Tue, 6 Sep 2016 14:17:30 +0100
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Hans-Christian Egtvedt <egtvedt@...fundet.no>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mfd: ucb1x00: remove NO_IRQ check

You need to send this _to_ me as I need to merge it with my other
changes.  This patch on its own does not make sense - it only makes
sense with the rest of my SA11x0 patch stack.

NAK for Lee to merge this.

On Tue, Sep 06, 2016 at 03:03:57PM +0200, Arnd Bergmann wrote:
> probe_irq_off() returns '0' on failure, not NO_IRQ, so the check
> in this driver is clearly wrong. This replaces it with the
> regular '!irq' check used in other drivers.
> 
> The sa1100 platform that this driver is used on originally numbered
> all its interrupts starting at '0', which would have conflicted with
> this change, but as of commit 18f3aec ("ARM: 8230/1: sa1100: shift
> IRQs by one"), this is not a problem any more.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  drivers/mfd/ucb1x00-core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mfd/ucb1x00-core.c b/drivers/mfd/ucb1x00-core.c
> index 48bea5038654..d6fb2e1a759a 100644
> --- a/drivers/mfd/ucb1x00-core.c
> +++ b/drivers/mfd/ucb1x00-core.c
> @@ -537,7 +537,7 @@ static int ucb1x00_probe(struct mcp *mcp)
>  	ucb1x00_enable(ucb);
>  	ucb->irq = ucb1x00_detect_irq(ucb);
>  	ucb1x00_disable(ucb);
> -	if (ucb->irq == NO_IRQ) {
> +	if (!ucb->irq) {
>  		dev_err(&ucb->dev, "IRQ probe failed\n");
>  		ret = -ENODEV;
>  		goto err_no_irq;
> -- 
> 2.9.0
> 

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
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