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Date: Thu, 15 Oct 2026 11:56:05 +0200
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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Vladimir Kondratiev <Vladimir.Kondratiev@mobileye.com>
Cc: Anup Patel <anup@brainfault.org>, Thomas Gleixner <tglx@kernel.org>,
	Radu Rendec <radu@rendec.net>, Paul Walmsley <pjw@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>, Alexandre Ghiti <alex@ghiti.fr>,
	Clark Williams <clrkwllms@kernel.org>,
	Steven Rostedt <rostedt@goodmis.org>,
	Jessica Liu <liu.xuemei1@zte.com.cn>,
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
	linux-rt-devel@lists.linux.dev
Subject: Re: [PATCH v3] irqchip/riscv-aplic: fix asynchronous probing
Message-ID: <20261015095605.pIRkhzUR@linutronix.de>
References: <20261012-aplic-async-probe-v3-1-5cf52dc28690@mobileye.com>
 <20261013152727.2cUDX3l0@linutronix.de>
 <5a8048ef-a241-4486-adc1-440721d3606a@mobileye.com>
 <20261014105312.xNkvgkGg@linutronix.de>
 <46eaa0f0-ff72-4a72-91c8-b610be2d893a@mobileye.com>
 <20261015063227.GBjyN6LZ@linutronix.de>
 <9bb6f315-c668-4f90-9fee-920f115a3dcd@mobileye.com>
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In-Reply-To: <9bb6f315-c668-4f90-9fee-920f115a3dcd@mobileye.com>

On 2026-10-15 11:11:24 [+0300], Vladimir Kondratiev wrote:
> On 10/15/26 09:32, Sebastian Andrzej Siewior wrote:
> > The driver providing MSI capabilities (the MSI domain for this device)
> > must a module. This is the requirement so that _this_ driver returns
> > EPROBE_DEFER and *then* once the MSI domain driver is loaded as a module
> > (after boot) this driver is probed again and succeeds.
> Why module? for "riscv-aplic", "msi-parent" shall be "riscv-imsic" and
> it is "builtin_platform_driver", see
> drivers/irqchip/irq-riscv-imsic-platform.c

But _how_ do you want to make deferred probing happen that will change
aplic_syscore_registered after init without using modules?

> Thanks, Vladimir

Sebastian