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smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Cz20H7dV; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6349A606A31B; Tue, 27 Oct 2026 15:26:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Cz20H7dV Received: by smtp.kernel.org (Postfix) with ESMTPSA id D47581F01825; Tue, 27 Oct 2026 15:26:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793114795; bh=UTZ0KdxtrRAJmu9V7A4LrovnqYfB1lyRM9tdslCmQOE=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=Cz20H7dVfruPuCw51mSYdVyCPbrpCTynDlQLVGuyE0Z4H2gbUeozix32jwaRqNzNH HZG5n1nbBnVVb8JEypNidBmOx59Az8AOJc9ddcjXeC/M8NsjsfNTn2XS440cA+R6CB xfTFgZbEiYKWoHz0UElxawnMEav4ecovlIsW5UG0UI7C1cCqZhzTX2g01BHcKkxHW2 zgtyu1EkFlu58DwcsdLOtUKGyNJ4d4yPQcleKpC05XE9qc0xwYidlUP3MsaVKBDR9s hStH4gI6qhuaxozRwP0yrjU0d6uVGuvgVDfXlGdZ764fKIw8UT011tDmEt8stlUfme LwrNKMecP1s0w== Message-ID: <9ef05c62-1067-459f-8dab-2b0fbe70178d@kernel.org> Date: Tue, 27 Oct 2026 16:26:30 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mfd: da9150: fix IRQ action memory leak on removal To: Guangshuo Li , Support Opensource , Lee Jones , Adam Thomson , mfd@lists.linux.dev, linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org References: <20261027030803.118131-1-lgs201920130244@gmail.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 27/10/2026 04:08, Guangshuo Li wrote: > da9150_remove() currently removes the regmap IRQ chip before removing > the MFD child devices. regmap_del_irq_chip() disposes the child IRQ > mappings and removes their IRQ descriptors. > > The GPADC child registers an interrupt handler using > devm_request_threaded_irq(). When the child device is subsequently > removed, its device-managed cleanup calls free_irq(), which can no > longer find the corresponding IRQ descriptor. As a result, the > allocated struct irqaction is not freed, causing a memory leak. > The associated IRQ thread also cannot be stopped normally. > > Remove the MFD child devices first so their interrupt handlers are > released while the IRQ mappings are still valid. Then remove the > regmap IRQ chip and its IRQ domain. > > This issue was found by our static analysis tool under development. So you just keep ignoring and ignoring our feedback. It's just bot, so little point to discuss with bot. Best regards, Krzysztof