linux-kernel - Re: [PATCH 11/21] i2c: spacemit: Remove IRQF

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Message-ID: <20260123205313-GYA71302@gentoo.org>
Date: Sat, 24 Jan 2026 04:53:13 +0800
From: Yixun Lan <dlan@...too.org>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: linux-kernel@...r.kernel.org, linux-rt-devel@...ts.linux.dev,
	Thomas Gleixner <tglx@...nel.org>,
	Troy Mitchell <troy.mitchell@...ux.spacemit.com>,
	Andi Shyti <andi.shyti@...nel.org>, linux-i2c@...r.kernel.org,
	linux-riscv@...ts.infradead.org
Subject: Re: [PATCH 11/21] i2c: spacemit: Remove IRQF_ONESHOT

Hi Sebastian, 

On 12:36 Fri 23 Jan     , Sebastian Andrzej Siewior wrote:
> Passing IRQF_ONESHOT ensures that the interrupt source is masked until
> the secondary (threaded) handler is done. If only a primary handler is
> used then the flag makes no sense because the interrupt can not fire
> (again) while its handler is running.
> The flag also disallows force-threading of the primary handler and the
> irq-core will warn about this.
> 
> Remove IRQF_ONESHOT from irqflags.
> 

I've sent out a similar patch which already accepted and queued, see
https://lore.kernel.org/r/20260122-05-k1-i2c-irq-v1-1-9b8d94bbcd22@kernel.org

> Cc: Troy Mitchell <troy.mitchell@...ux.spacemit.com>
> Cc: Andi Shyti <andi.shyti@...nel.org>
> Cc: Yixun Lan <dlan@...too.org>
> Cc: linux-i2c@...r.kernel.org
> Cc: linux-riscv@...ts.infradead.org
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
> ---
>  drivers/i2c/busses/i2c-k1.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/i2c/busses/i2c-k1.c b/drivers/i2c/busses/i2c-k1.c
> index d42c03ef5db59..8ef6d5d1927b7 100644
> --- a/drivers/i2c/busses/i2c-k1.c
> +++ b/drivers/i2c/busses/i2c-k1.c
> @@ -566,7 +566,7 @@ static int spacemit_i2c_probe(struct platform_device *pdev)
>  		return dev_err_probe(dev, i2c->irq, "failed to get irq resource");
>  
>  	ret = devm_request_irq(i2c->dev, i2c->irq, spacemit_i2c_irq_handler,
> -			       IRQF_NO_SUSPEND | IRQF_ONESHOT, dev_name(i2c->dev), i2c);
> +			       IRQF_NO_SUSPEND, dev_name(i2c->dev), i2c);
>  	if (ret)
>  		return dev_err_probe(dev, ret, "failed to request irq");
>  
> -- 
> 2.51.0
> 

-- 
Yixun Lan (dlan)