From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 D0ECE34107A; Fri, 10 Apr 2026 22:53:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775861623; cv=none; b=J/ny/TCrRT7geIPwAvkq4+HhlUFnm+aRaiZb0fXiXIvWYLuP4oHf5tCTxS5D1+XVl86F+vMfPVe1Kkpuj17iGSn15KEJ911Xi2meFZqlp5wpBVRjcL4N9erc7koFMESaf9hZx0s4rSJWuyASmckwivsHBh1c5XLz2oUGVs8aLJI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775861623; c=relaxed/simple; bh=9VBjNQAzbB9vwgFa9GsT6+N9W2jFYIIY2jEQ/4Yjw7E=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; b=cBVaQNhJW+bR1SPOWc8tir03p0lw0ageLFS/VRcFcFBVGFw3HayOQxT0aoU9IFaHuEdFl6qYC5/An0zUQXngHJprZuU0OmlFx4Yn6P2C+BLmT5rgwMABiZgsVv3uRMKVEpn/qJx9vEDnrV4PpNEgdrtFEHBquvDqrfdDXtgJFVU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=JlDXbIlb; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="JlDXbIlb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1193CC19421; Fri, 10 Apr 2026 22:53:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775861623; bh=9VBjNQAzbB9vwgFa9GsT6+N9W2jFYIIY2jEQ/4Yjw7E=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=JlDXbIlbK5X40pJZvtF0DRYkDEl98GwzuiRxiheKDsqyaB3Tmemx7eemj1/VWTZtd O50M1m/s7YWxzlT4PVxQB+OXsHFxvsOFWVEKuEASn1qzDyIiNdBmSQpyoptDTtItn/ fziGS/McdLELE72g+lmuXFc3SPDW7ulyP5gVM+jju34DQ9L6IbPiYYrDzWfCRAX6ds zvU4ZpefRlXXQEeuD4G+xDVGr+Bcw/M80+N+ORk40JJsMkX4n6WgRuKcRj6ocNQbDy 6kKvOkowpl4YDki/Z22Hd5lVxjf8tyIpR2JBKaWfMYI3oDFVhgCDHb2TNMnhPJIEJa PbAosXJR4dLpA== Date: Fri, 10 Apr 2026 17:53:41 -0500 From: Bjorn Helgaas To: Hongxing Zhu Cc: "mani@kernel.org" , Frank Li , "jingoohan1@gmail.com" , "l.stach@pengutronix.de" , "lpieralisi@kernel.org" , "kwilczynski@kernel.org" , "robh@kernel.org" , "bhelgaas@google.com" , "s.hauer@pengutronix.de" , "kernel@pengutronix.de" , "festevam@gmail.com" , "linux-pci@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "imx@lists.linux.dev" , "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" Subject: Re: [PATCH v1] PCI: imx6: Add force_suspend flag to override L1SS suspend skip Message-ID: <20260410225341.GA598942@bhelgaas> Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Wed, Apr 08, 2026 at 02:38:35AM +0000, Hongxing Zhu wrote: > ... > One additional note regarding NVMe: ASPM (Active State Power Management) is > disabled locally on i.MX platforms for NVMe devices. This decision was made > after encountering a system hang issue similar to the one reported by Hans a > few months ago in his patch listed below. > https://lore.kernel.org/linux-nvme/20250502032051.920990-1-hans.zhang@cixtech.com/ Where is ASPM disabled for i.MX? I don't see anything in pci-imx6.c. It doesn't sound architecturally clean to me to disable ASPM based on whether an NVMe device is involved.