From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2434C50E59B for ; Mon, 19 Oct 2026 14:10:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792419017; cv=none; b=gUI31u59W0VhUwOmPhdD8vq1WjzGoGzCqFayJ6UXwEXeT9CwuV4Xdbk1dekfaEvKF+HmLTfTwH3gRoadbNNN+tEQnKnxePqXJDmcYNjEWqdFRh3A8Tz/3SZf/f3cca870evgx6yoPAtqLAjlMshzfw23aV6r6Mwe1UwfNKPT4I0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792419017; c=relaxed/simple; bh=cUunhoH2O52jTJWEPh6GdkcneLFPcV6KnmROpd+u4rU=; h=Message-ID:From:Subject:To:Cc:In-Reply-To:References:Content-Type: Date; b=P3EtGahzYLRZHe43b/6dUh2aeml9WXrg9HQz9c4n8JMCH4Dxcup7XMrJiLyVh112w8zmeW1kTbSdN5i6UDC3XRYA6D3W6bpNiPSuSaKtxBq0a8YrLG+SYMcowOaxUiw33zEHSHoKlfJqexVrByGVx+sHG/p6XLeay3eF7r05w58= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Fse/kgs1; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Fse/kgs1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 70A561F000C4; Mon, 19 Oct 2026 14:10:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792419015; bh=fsmCzF9wj/+zjAVQAILRWVqMuR053rXc7FdkIBMC2uQ=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=Fse/kgs1VKOc99QBrOmY0wp5Dju/VEB7xrNdiXPmEqhI5acEdfJKvSGJj+iT5AlfA YX994hDaeTKtKtaymGGh6T1dOSS+MvEy/SwTFI3U711NHa/2pEm+A72Hftz97eJ6Rs 1LUTEhjpIRf1zT+DxSjCPkHco3Hx3K16T3XAbK1bPdp9QHf1HmCXdCj3n66OvV1V8u Il2xNUfKxpEi7hSTD9ktHcriK8xyrmzFYt5ihIC/gBBKe8fjKfL6vMFMtRBwBc2HxS il4YZVERiItK09dbhnxFsZR1qrQ6+w5hRSzaRyBQvfjv9bG/A8jrs/3NBsNZ/PG4gE cvx8UR3R0AFyw== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH AUTOSEL 6.18-6.12] serial: 8250: force synchronous probe for the ISA and PNP drivers Reply-To: sashiko-reviews@lists.linux.dev To: "Sasha Levin" Cc: linux-serial@vger.kernel.org In-Reply-To: <20261019135441.1420968-63-sashal@kernel.org> References: <20261019135441.1420968-1-sashal@kernel.org> <20261019135441.1420968-63-sashal@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Mon, 19 Oct 2026 14:10:15 +0000 Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: > From: Rahul Bukte >=20 > [ Upstream commit 31e11af34e2c7cc61e25533ab877b1f9cc3eb528 ] >=20 > On x86_64 defconfig, booting with driver_async_probe=3Dserial hangs in ea= rly > init. The 8250 PNP driver is put onto the async probe pool. > serial8250_register_8250_port() runs in a kworker concurrently with the > ISA registration done from the serial8250_init() initcall resulting in a > deadlock or NULL dereference. >=20 > - Deadlock: serial_core_register_port() holds port_mutex across > serial_core_add_one_port() > uart_configure_port() > autoconfig_irq() > probe_irq_on() > [ ... ] >=20 > Signed-off-by: Rahul Bukte > Link: https://patch.msgid.link/20260610054130.2825182-1-rahul.bukte@sony.= com > Signed-off-by: Greg Kroah-Hartman > Signed-off-by: Sasha Levin Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261019135441.1420= 968-63-sashal@kernel.org?part=3D1