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 419CE366839 for ; Wed, 25 Feb 2026 23:42:58 +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=1772062978; cv=none; b=Xe+bhMe53bLzBu0NxO84WnAeK+RoZMxGjfE4UxqgZlPIEWqG0Q6Rl4/nDnXakm/YJXISnbRTw6gS9xBeGeuWLLUeGSY9dW/eY316jvpUWYREBh133U3aOiMevphbTXiEW0Mq+AdWOU30NafjH+r2rDKVIeaxnjtEnuUQQ8B+lRk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772062978; c=relaxed/simple; bh=LbZZe+ok2eBjLEx6G445aicFL18drENJOqeAaTCnPd4=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=oGiAcK+PSVWD0qH+NdSCJX1FlQmXQLPqaLokt7ejcpi6DOYULy+YRGZu/m15h6ChosHV/h4NgGk9+RunRbTFs7fFfSlDltUpWP3wpHF79RiYm7FmiEbW3ywLH45TAq6fiZf6fE2D4uRST0blWW4P+rbctNzZj4EzE9smpXxCG20= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=jmGTiaAD; 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="jmGTiaAD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BDEFFC116D0; Wed, 25 Feb 2026 23:42:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772062977; bh=LbZZe+ok2eBjLEx6G445aicFL18drENJOqeAaTCnPd4=; h=Date:From:To:Cc:Subject:From; b=jmGTiaADKR3Ble3umOm5pAK9Azs1es3gfJl/9NWdhrr1D9rMUUBC+UQHN3wOJneFT ZjldEiQgq0JsU188Af3R0OFFILhBaNESXWtvNKo5Tg0+f91iGUxu2R141kHnf8yQWj atE4xrY4VE/ar2PB4ho3n4RjcMPYd8DsDeXf9cAQBmOswGTa9mmY/Rd7fnILhySQZP /YSDHB/rJRAF3YVKAxYZ6kvDcl26N4/40wvCTUoK9pfQmva1jvSNoUGdiXSrBjACkC iKLJUlJbTQyUPtIFFBZ0i6hUnOj2OuxkbMmyVxuOVci8nXLxin8lRMAurXLm/Y8J1b +Cd3PwnJlqp7w== Date: Wed, 25 Feb 2026 17:42:56 -0600 From: Bjorn Helgaas To: Nirmal Patel , Jonathan Derrick Cc: linux-pci@vger.kernel.org Subject: [Bug 221136] New: VMD fails on Intel Arrow Lake-S: Unknown Bus Offset Setting (3) & Incorrect SATA Class Code Message-ID: <20260225234256.GA3792529@bhelgaas> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Looks related to https://bugzilla.kernel.org/show_bug.cgi?id=221130 >From https://bugzilla.kernel.org/show_bug.cgi?id=221136 (reporter bcc'd again). > On Intel Arrow Lake-S (ARL-S) platforms (specifically using PCH VMD > ID `8086:09ab`), the VMD driver fails to initialize correctly, > leaving all SATA drives in RST/VMD mode invisible. The failure stems > from three primary issues: missing support for Mode 3 bus offsets, > an incorrect device class code reported by the SATA controller, and > overly restrictive BAR resource checks. There are lots more details and what looks like a modified vmd.c (not a patch) to fix the problem in the bugzilla. Lin, thanks a lot for your work in discovering, debugging, and proposing a fix for this issue. If you start here: https://www.kernel.org/doc/html/latest/process/submitting-patches.html and skim some other patches at https://lore.kernel.org/linux-pci/, you'll see the usual process for submitting Linux kernel patches.