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 ED8FE1C84DC; Thu, 22 Jan 2026 00:10:08 +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=1769040609; cv=none; b=DGbpnYkonf8mWet/Q0BvYs3CGaUCJmsSnkvnCKWfH0dtpltzR1HpiEDzJO8IQ5yB+6Yl6algx5Dd9HhVtOVsUObwtMO603TkJ0nEtoijhQ/8tn+kHflpqVpRNpg//ltP5AQHZYEwa93alGJ0St4QiVWRwvflmwH++WcmAkzG+Gc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769040609; c=relaxed/simple; bh=p6jTPltqyi6CO00kOm7xo600HOdPLsIjsOTrNopkzb8=; h=Date:From:To:Cc:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition:In-Reply-To; b=PfnTibUsJGaUxJfJyRYyK4sb/qIp4TzenqLOF/OXyiIQYbsXtjWseOIhy/QcuYhmwMAIB/trPK+r6c+odk883CcR+rO1VwgWN6wsqwUUAhIW4I0rriePBaC4JyETGHEJN0vRiJPGXJtBspsQJfTWYL5ra/J3dmPlDRSW4294zqI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pvohqRML; 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="pvohqRML" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D0A96C4CEF1; Thu, 22 Jan 2026 00:10:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769040608; bh=p6jTPltqyi6CO00kOm7xo600HOdPLsIjsOTrNopkzb8=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=pvohqRMLri2cZhsUaa/G6ogHe2myRgMt24fzQdWNjMRmBytDDdEMHllPL9QsI/DE3 QM1R8lJx48L3hUeR7umc8No5YqxCWzTE6TYezSDiFHFYe37ktsvvQZH+O5xDvpAt3b fkq9WuQbUjOLcCsRH7awGxhZGFYh4HPZuW4HGUnX2ae7EjNYks0mog2jn9WGGtQEb/ Tso6nDsa/ugDIB7XCZ0VYuKBIh6lpwc/VMQg/mE111BCWdpDpHUAmOLKj6xMwwj88+ Dkak5097AGBPyue/aND1TR0JfuehE8agDpnkMpHFYfCbjTTtqH3/SF5Lsun5ax2LZH h7fTirczJw2xA== Date: Wed, 21 Jan 2026 18:10:06 -0600 From: Bjorn Helgaas To: Nicolas Cavallari Cc: Bjorn Helgaas , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Nathan Rossi , Nathan Rossi Subject: Re: [PATCH] PCI: Add PCI ID 12d8:b404 for Pericom switch ACS quirk Message-ID: <20260122001006.GA1224778@bhelgaas> 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=us-ascii Content-Disposition: inline In-Reply-To: <20260119160915.26456-1-nicolas.cavallari@green-communications.fr> [+cc Nathan, author of acd61ffb2f16 ("PCI: Add ACS quirk for Pericom PI7C9X2G switches")] On Mon, Jan 19, 2026 at 05:08:33PM +0100, Nicolas Cavallari wrote: > 12d8:b404 is apparently another PCI ID for Pericom PI7C9X2G404 (as > identified by the chip silkscreen and lspci). > > It is also affected by the PI7C9X2G errata (e.g. a network card attached > to it fails under load when P2P Redirect Request is enabled), so apply > the same quirk to this PCI ID too. > > PCI bridge [0604]: Pericom Semiconductor PI7C9X2G404 EV/SV PCIe2 4-Port/4-Lane Packet Switch [12d8:b404] (rev 01) > > Fixes: acd61ffb2f16 ("PCI: Add ACS quirk for Pericom PI7C9X2G switches") > Closes: https://lore.kernel.org/all/a1d926f0-4cb5-4877-a4df-617902648d80@green-communications.fr/ > Signed-off-by: Nicolas Cavallari Applied to pci/virtualization for v6.20, thanks! > --- > drivers/pci/quirks.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c > index b9c252aa6fe0..c462d0ed3fd6 100644 > --- a/drivers/pci/quirks.c > +++ b/drivers/pci/quirks.c > @@ -6188,6 +6188,10 @@ DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_PERICOM, 0x2303, > pci_fixup_pericom_acs_store_forward); > DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_PERICOM, 0x2303, > pci_fixup_pericom_acs_store_forward); > +DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_PERICOM, 0xb404, > + pci_fixup_pericom_acs_store_forward); > +DECLARE_PCI_FIXUP_RESUME(PCI_VENDOR_ID_PERICOM, 0xb404, > + pci_fixup_pericom_acs_store_forward); > > static void nvidia_ion_ahci_fixup(struct pci_dev *pdev) > { > > base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8 > -- > 2.51.0 >