From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: From: David Daney To: Bjorn Helgaas , linux-pci@vger.kernel.org Subject: [PATCH 2/2] PCI: Avoid bus reset for Cavium cn8xxx root ports. Date: Mon, 15 May 2017 17:17:36 -0700 Message-Id: <20170516001736.4001-3-david.daney@cavium.com> In-Reply-To: <20170516001736.4001-1-david.daney@cavium.com> References: <20170516001736.4001-1-david.daney@cavium.com> MIME-Version: 1.0 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jon Masters , Robert Richter , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, David Daney Content-Type: text/plain; charset="us-ascii" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+bjorn=helgaas.com@lists.infradead.org List-ID: Root ports of cn8xxx do not function after bus reset when used with some e1000e and LSI HBA devices. Add a quirk to prevent bus reset on these root ports. Signed-off-by: David Daney --- drivers/pci/quirks.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 085fb78..02cd847 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3347,6 +3347,14 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0032, quirk_no_bus_reset); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x003c, quirk_no_bus_reset); DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0033, quirk_no_bus_reset); +/* + * Root port on some Cavium CN8xxx chips do not successfully complete + * a bus reset when used with certain types child devices. Config + * space access to the child may quit responding. Flag the root port + * as not supporting bus reset. + */ +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CAVIUM, 0xa100, quirk_no_bus_reset); + static void quirk_no_pm_reset(struct pci_dev *dev) { /* -- 2.9.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel