From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793159872; b=CmGuB4VbvSct2FGvkrzAzLkRBM3AcsTodGJAXgGz3aH/BkxKYAcHA4HLbzgiUZx8k6xR Ak//Dmsz8I/vQLqEbEklWAuUgJ4x+rfNrCsvJKnkOc+D5sM+vvHR8A7ZIICqLWMDf1kk7 qKKYOdE8yz9lNoqW2LIEniz8vhgTHLIfZmBi5h76kfUjie0XlTq3g9RfdkBRHW59sMfxR HvBH9GH4BKwEhEvMzZRMXMVl9GpSW7JcY11+QXx2pCY70e1Xp8zPZAoZtZDo7vh8ly1n0 m6zXz6a7ol//UUC4Qv2HdclhnXBUAXsedNQ0c5dqaukE7UWBt0JB61lA3UQZWC+g5BA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793159872; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=Nt0pxHmh4HO8CDZJ3B8yfMpLw6KuzCIafkk/0XJhxnk=; b=eYr7cP4c3Yz/gAQ2KPaaXOPSt/j7JxfJwnfmR8CRxt74+m0FzaAEG6CnYRXqxkRlY8eG 0Gf1CSOuIP9Bt/ztioqWPK3ef3hPmf+V+oQc4JFOas1csY8mZkgGtvrBGEls75wnwZ6+L maySbeqW6jx1RKdGMP7322awX5lejcwiHF3cicUcybmf/nGNEsJq2AnkbNyDHsBwCO8qA eYq9Pv2lbds5IyuNYfX7El6sEc+F6k/heQZ03YsBop2jG8XImJK/w1qHcKzZzAaI1K6GG iNf59+30kTwwoB9GLECEqW7hA3iT0IFyRp0UGANBo2tXX69ToQW0bcopA4T5kvrlJsA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=TvTSBhaw; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 93CA8606A334; Wed, 28 Oct 2026 03:57:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=TvTSBhaw Received: by smtp.kernel.org (Postfix) with ESMTPSA id A24211F031E3; Wed, 28 Oct 2026 03:57:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793159871; bh=Nt0pxHmh4HO8CDZJ3B8yfMpLw6KuzCIafkk/0XJhxnk=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=TvTSBhawkjmcQJI82Ldyep92HoeSY0vdPBw7joHF7MRx4vXZJKUUEpUPIgast0+yu eZCgPZUEUKPSKWtjjKimxsuFaWTToBzULB7MkAQawbCaFaOndnQWDmzj7UZHNXrtU2 MIl4lAoJXS7smxLDcVmjFmcSXOkNRH3GGt/7U61Y= Date: Wed, 28 Oct 2026 04:57:49 +0100 From: Greg KH To: Haowen Bai Cc: mathias.nyman@linux.intel.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2] usb: pci-quirks: abort xHCI handoff if MMIO is inaccessible Message-ID: <2026102811-septic-confront-ec64@gregkh> References: <2026102749-spender-coke-2fc1@gregkh> <20261028021226.1314753-1-calvin.bai@ugreen.com> 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=us-ascii Content-Disposition: inline In-Reply-To: <20261028021226.1314753-1-calvin.bai@ugreen.com> On Wed, Oct 28, 2026 at 10:12:26AM +0800, Haowen Bai wrote: > Hi Greg, > > > Sorry, but I see no context here at all :( > > Sorry for the missing context. The v2 patch is here: > > https://patchew.org/linux/02C44DCEA968C75D%2B20260914022743.30852-1-calvin.bai%40ugreen.com/ > > It makes the xHCI early handoff abort when MMIO reads return all ones, > avoiding prolonged polling and soft lockups during PCI hotplug. > > The v2 incorporates Lukas's suggestion to use PCI_POSSIBLE_ERROR() > and carries Mathias's Acked-by. > > Could you please take this through your USB tree, or should it go > through Mathias's xHCI tree? I can resend the full patch if needed. I'll get to it after -rc1 is out, thanks. greg k-h