linux-kernel - Re: [PATCH] gpio: ljca: Fix duplicated IRQ mapping

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Message-ID: <CAMRc=MekWJPnhwLn9z4=yqC4Pjyf2xd7teKCLTUEmnBCDLeROA@mail.gmail.com>
Date: Thu, 23 Oct 2025 10:09:05 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Haotian Zhang <vulab@...as.ac.cn>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: Lixu Zhang <lixu.zhang@...el.com>, Sakari Ailus <sakari.ailus@...ux.intel.com>, 
	Linus Walleij <linus.walleij@...aro.org>, linux-gpio@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] gpio: ljca: Fix duplicated IRQ mapping

On Thu, Oct 23, 2025 at 9:02 AM Haotian Zhang <vulab@...as.ac.cn> wrote:
>
> The generic_handle_domain_irq() function resolves the hardware IRQ
> internally. The driver performed a duplicative mapping by calling
> irq_find_mapping() first, which could lead to an RCU stall.
>
> Delete the redundant irq_find_mapping() call and pass the hardware IRQ
> directly to generic_handle_domain_irq().
>
> Fixes: c5a4b6fd31e8 ("gpio: Add support for Intel LJCA USB GPIO driver")
> Signed-off-by: Haotian Zhang <vulab@...as.ac.cn>
> ---

Andy: this looks correct to me and you already sent your PR with
fixes, should I take it directly into my fixes tree for v6.18-rc3?

Bart