From nobody Thu Oct 2 05:03:19 2025 Received: from mout-p-102.mailbox.org (mout-p-102.mailbox.org [80.241.56.152]) (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 7D96A2E8B63; Mon, 22 Sep 2025 15:34:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.241.56.152 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758555260; cv=none; b=eVIAcUHUZ70cP5zVZjtpi3eHEPEOZuEgkIYOfzwBvR/4+qtiGwYQAcj3wJC8t/XxfBBHTuXWF7F5q/WdWdngSzkOql5YVr7J37qmXXUik5Ovt+8SJ+hIFGzPMDZ1/Da0zztV+so5O95Q9kSnMK3uT02lLwsE79Rs+dB/LmVJetU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758555260; c=relaxed/simple; bh=4g8pdZiNUoEUbdC/+29dwwVutwbVoelgcoRU4UE69Bg=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=T/L8WdOQFC6F8MUiA/BcsAew81y3JZ+VUDtbXhM5nLc/qCW0TY8QJ7EDyGlR2bGj7tv2OXl+9YLgOPl1qM89LePhONYL/nUwovg2ojNK0AEX+4lRefWiBp2sZYAmo8e2u6PUJJLMpEkXkL6g3VO8A4dXtbmB2Drbsk5QGwNL3AY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org; spf=pass smtp.mailfrom=mailbox.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b=fF4cPOY6; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b=aTbC89OW; arc=none smtp.client-ip=80.241.56.152 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mailbox.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b="fF4cPOY6"; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b="aTbC89OW" Received: from smtp102.mailbox.org (smtp102.mailbox.org [10.196.197.102]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mout-p-102.mailbox.org (Postfix) with ESMTPS id 4cVnGC00nqz9tTb; Mon, 22 Sep 2025 17:34:11 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1758555251; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=T/WfyxJwREoktiQFDoI3msz85U3rthfK4OgtAIm+ta4=; b=fF4cPOY6kVDD+HqL2NKouMkZV7oNc6vNAcZ4Jo4e3HSYg9GbBcxOl6AOy/Ks/kqyGBbzsk JU2/AI6n3PmJzNi3RGFbA2s19RkBuMk5jeBVPhX/6FEbRktCgh/wYj8jfU5S+oLmhesDnZ XA143cJTJefkwoz+dIHju6lQxgKnTxgh784mqhJ5efqic0ZbeJI9aHYW5JNWCAxauJQ1Ro 6lMi7kEDaMG8c39YcMC/8DiTmBniRBP6JItbL56p22QAgwIN2lzHaGs+gUwbNE3AG/laav DKBqulMbPbPzObi/Tg8QxNM13ElkF0wgy4oiAdezLqll4QXXUErMauOBFkSuQA== From: Marek Vasut DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1758555249; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=T/WfyxJwREoktiQFDoI3msz85U3rthfK4OgtAIm+ta4=; b=aTbC89OWGfBoI9HBTujrfBZGB6NCv+2Gq90taOAGwUB5cogLWb4kcTYNfbBDiknJtiSN+6 4Jk9uAehRpLyHFL+Y18H3Gq/bCClEVNPBE5ALCY2VRNUz1cQOERLSE/gzVnc2lcTkEXlln C1aHNje0UiCNSPosaJoGsTCZkbDKK9dtEwxRpMLJQnvbywW/DLnVIuTFaBNP3L+gMDGygC 2v2Vg5s3Pa3bgOfL+BaubN1AWHV6CofdKTzgflTplp2SVhsq7sf6FunhtnjvqwvDI8sz+f fRP4DJbfmUnNzUG9zwb4+J6HEwHNhaR1/dw5P6arntrDYR2WCHHr9ejpAmGqKw== To: linux-pci@vger.kernel.org Cc: Marek Vasut , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Bjorn Helgaas , Geert Uytterhoeven , Lorenzo Pieralisi , Magnus Damm , Manivannan Sadhasivam , Marek Vasut , Rob Herring , Yoshihiro Shimoda , linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org Subject: [PATCH] PCI: rcar-host: Add static assertion to check !PCI_LOCKLESS_CONFIG Date: Mon, 22 Sep 2025 17:33:23 +0200 Message-ID: <20250922153352.99197-1-marek.vasut+renesas@mailbox.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-MBO-RS-ID: 78269535d8f6cd48f72 X-MBO-RS-META: c7edgmgujodt3bt7ycs9yx6rdws6b8mf This driver can not function correctly without PCIe subsystem level config space access serialization. In case PCI_LOCKLESS_CONFIG is ever enabled on ARM, complain loudly so the driver can be updated accordingly. Signed-off-by: Marek Vasut --- Cc: "Krzysztof Wilczy=C5=84ski" Cc: Bjorn Helgaas Cc: Geert Uytterhoeven Cc: Lorenzo Pieralisi Cc: Magnus Damm Cc: Manivannan Sadhasivam Cc: Marek Vasut Cc: Rob Herring Cc: Yoshihiro Shimoda Cc: linux-kernel@vger.kernel.org Cc: linux-pci@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org --- drivers/pci/controller/pcie-rcar-host.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/pci/controller/pcie-rcar-host.c b/drivers/pci/controll= er/pcie-rcar-host.c index 213028052aa58..29e13f7ff7ff1 100644 --- a/drivers/pci/controller/pcie-rcar-host.c +++ b/drivers/pci/controller/pcie-rcar-host.c @@ -35,6 +35,14 @@ =20 #include "pcie-rcar.h" =20 +/* + * This driver can not function correctly without PCIe subsystem level + * config space access serialization. In case PCI_LOCKLESS_CONFIG is + * ever enabled on ARM, complain loudly so the driver can be updated + * accordingly. + */ +static_assert(!IS_ENABLED(CONFIG_PCI_LOCKLESS_CONFIG)); + struct rcar_msi { DECLARE_BITMAP(used, INT_PCI_MSI_NR); struct irq_domain *domain; --=20 2.51.0