From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=pass header.oldest-pass=0 smtp.remote-ip=136.143.169.17 ARC-Seal: i=2; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=pass; t=1794257289; b=Ld9uiPwVlJyRgyd9dcHbFm4UFHYH7LSDpt0c1UW22gqTEfVnjY92Aj6C5qrEeURkbOtV SdyoHVhE9p49jKM96FHbAQP5fbhmiEdRu92flySirVbKf2o7xBf+ih4PU91eJKqL1NmE3 MMCs60WjgQdDn+GK1FsHWbsM15WRyY3cdD3f+hxkG42QmO4aAj/qvgy1HnDRt9xYQZmAO 3TyzOuaJPzkjXvEbXgzWNuk5wYhWFROjhvvn44mnB0qc20U3judu8Npohq34vF6DsmQ64 BCMyuiDnFBTuvLua5MUDP8X9kbRWez6N5cMfWQtwk0VMM9tXwq7Ye8Lw3V1MQQApCWg== ARC-Message-Signature: i=2; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794257289; h=DMARC-Filter:DKIM-Signature:Received:Date:From:To:Cc:Subject: Message-ID:In-Reply-To:References:MIME-Version:Content-Type: Content-Transfer-Encoding; bh=hAko9zGkmi9niJtZOL71kVVVwwbmLc2t5MHh5r5eE0o=; b=HmUl+hmzIIhor4pwwb0ADJaDjXAOaTINeOPNfoytG9+xYQc74p7LNYJ1lOngtYXH2xQd 7DideO+1Q5KYIxeDj1je2U1egvKNx6zBPGvc6/xN8KVrT3T8CA24BFtjh1yQ1alsojVAr 9Q4ltHtyBqPKoR+4L3zLV/IyWYm5SKL67Jl4ZywB/X6jfaNQlwuYHR3IoflJUUHJVjMMz ouQu1O4cs7TBmm0q4RUNutSIor9QbpJP1IJMqInNIcE5NCdJaQ4cjMlAhjJ9sD0fLlgUJ 2o14qFqXVvszWId/A+Jk83gUwj8HH3YgQOXmf4nA9L6WQn5+HNM6OPbAEDiFjb0mA1g== ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=none header.from=iav.lv; spf=pass smtp.mailfrom=iav.lv; dkim=pass header.d=iav.lv header.i=@iav.lv header.a=rsa-sha256 header.s=zoho header.b="IFFVSli/"; arc=pass header.oldest-pass=0 smtp.remote-ip=136.143.169.17 Received: from sender-op-o17.zoho.eu (sender-op-o17.zoho.eu [136.143.169.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D7540606A321; Mon, 9 Nov 2026 20:48:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org D7540606A321 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iav.lv Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iav.lv Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=iav.lv header.i=@iav.lv header.a=rsa-sha256 header.s=zoho header.b=IFFVSli/ ARC-Seal: i=1; a=rsa-sha256; t=1794257262; cv=none; d=zohomail.eu; s=zohoarc; b=E98HJo4M9xbxdr894U55ndlMxcGrMXf4IZiUI2186xilrWWrK+VG5p6micoS1kwGVPTtS1zJ9bY8NWcxbw3wI2SNFk4sc55tc07qaWYSLlrW+hKrtLnW3dNtBxR7zfyEKqJDFRYw/Oar7zOV6kut8Zb1sp8rAhaSV7vkK3LIXNc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.eu; s=zohoarc; t=1794257262; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:Subject:Subject:To:To:Message-Id:Reply-To; bh=hAko9zGkmi9niJtZOL71kVVVwwbmLc2t5MHh5r5eE0o=; b=LyaXY6Obyfmz9ip0+Slx4XjSlVg8teruIXtc4tnbM9WBqTXeFsQoIolV7T85UOvBFFBIzSldbXnO1ia1qbFxL7mwI2RGQAtFsvLKuuUaDncb/cgsWOXPmjoBuejRtnUgMzj4FYVO2ArARKNqpCBPIOrfXaCqF7vmjfmFF3TTlVI= ARC-Authentication-Results: i=1; mx.zohomail.eu; dkim=pass header.i=iav.lv; spf=pass smtp.mailfrom=iav@iav.lv; dmarc=pass header.from= DKIM-Signature: a=rsa-sha256; b=IFFVSli/fpGgICQj52Xp3TckmHGAzWCHrwGBi2PqqOm2PEHLoPZqCOCANftleC+kptSgcc0ElcHEuqoJIhlT5DN4piVmO0yIxB7SYiLNjUkn9LegPLlZu3GLs7sjAwhO39SYvwRc3IfyGYAbvT0fwrev/fZ+l4+aqp3IOrnCF7U=; c=relaxed/relaxed; s=zoho; d=iav.lv; v=1; bh=hAko9zGkmi9niJtZOL71kVVVwwbmLc2t5MHh5r5eE0o=; h=Content-Description:Content-ID:Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Owner:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Resent-Sender:Resent-Cc:Resent-Date:Resent-To:Reply-To:Resent-Message-ID:Resent-From:Sender:Subject:To:Date:From:Message-Id:Reply-To:Subject:To:Cc; Received: by smtp.zoho.eu with SMTPS id 1794257260723543.4215096609604; Mon, 9 Nov 2026 21:47:40 +0100 (CET) Date: Mon, 09 Nov 2026 22:47:39 +0200 From: Igor Velkov To: Bjorn Helgaas Cc: Shawn Lin , Lorenzo Pieralisi , Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= , Manivannan Sadhasivam , Bjorn Helgaas , Heiko Stuebner , Rob Herring , linux-pci@vger.kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Igor Velkov Subject: Re: [PATCH] PCI: rockchip-host: Enable async probe by default Message-ID: <20261109204122.async-probe-reply@iav.lv> In-Reply-To: <20261109202202.GA265423@bhelgaas> References: <20261103-rockchip-pcie-async-v1-1-4dcadb94af64@iav.lv> <20261109202202.GA265423@bhelgaas> 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 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On Mon, Nov 09, 2026 at 02:22:02PM -0600, Bjorn Helgaas wrote: > I don't know what the SD card has to do with PCIe. Seems like there's > some SD issue, and making PCIe async happens to avoid it? Sounds > fragile to me. > > Other changes like c0e1eb441b1d justify it by allowing other drivers > to load in parallel to reduce boot time, which is a good reason. But > apparently here it makes a functional difference as well, which feels > sketchy. E.g., what other drivers need to use async probe to avoid > similar issues? You're right that the real problem is ordering: nothing makes dw_mmc wait for the RK3399 io-domain driver, which sets the 1.8 V level of the SD pins. [1] tried to add that dependency and was not merged. Async probe only stops this driver from holding the deferred-probe worker for ~0.7 s; any other slow probe in that window breaks UHS the same way. Is there a way to express this dependency that you would accept? [1] https://lore.kernel.org/all/20230904115816.1237684-1-s.hauer@pengutronix.de/ -- Igor Velkov