linux-kernel - Re: [PATCH] i3c: dw: Initialize spinlock to avoid upsetting lockdep

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Message-ID: <aWkY5LCmhcTh+qN0@lizhi-Precision-Tower-5810>
Date: Thu, 15 Jan 2026 11:42:12 -0500
From: Frank Li <Frank.li@....com>
To: Fredrik Markstrom <fredrik.markstrom@....tech>
Cc: Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Joel Stanley <joel@....id.au>,
	Jeremy Kerr <jk@...econstruct.com.au>,
	linux-i3c@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Jani Nurminen <jani.nurminen@...driver.com>,
	Ivar Holmqvist <ivar.holmqvist@....tech>
Subject: Re: [PATCH] i3c: dw: Initialize spinlock to avoid upsetting lockdep

On Thu, Jan 15, 2026 at 02:25:29PM +0100, Fredrik Markstrom wrote:

Need context here. You can duplicate subject.

Initialize spinlock to avoid upsetting lockdep.

Frank

> Fixes: e389b1d72a624 ("i3c: dw: Add support for in-band interrupts")
> Suggested-by: Jani Nurminen <jani.nurminen@...driver.com>
> Signed-off-by: Fredrik Markstrom <fredrik.markstrom@....tech>
> Reviewed-by: Ivar Holmqvist <ivar.holmqvist@....tech>
> ---
>  drivers/i3c/master/dw-i3c-master.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
> index 889e2ed5bc83..d5b070404056 100644
> --- a/drivers/i3c/master/dw-i3c-master.c
> +++ b/drivers/i3c/master/dw-i3c-master.c
> @@ -1570,6 +1570,8 @@ int dw_i3c_common_probe(struct dw_i3c_master *master,
>  	spin_lock_init(&master->xferqueue.lock);
>  	INIT_LIST_HEAD(&master->xferqueue.list);
>
> +	spin_lock_init(&master->devs_lock);
> +
>  	writel(INTR_ALL, master->regs + INTR_STATUS);
>  	irq = platform_get_irq(pdev, 0);
>  	ret = devm_request_irq(&pdev->dev, irq,
>
> ---
> base-commit: 0f61b1860cc3f52aef9036d7235ed1f017632193
> change-id: 20260115-i3c_dw_initialize_spinlock-d878212a846b
>
> Best regards,
> --
> Fredrik Markstrom <fredrik.markstrom@....tech>
>