linux-kernel - [PATCH 3.16 042/132] PCI: Mark Atheros AR9462 to avoid bus reset

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Message-ID: <lsq.1568989415.851296032@decadent.org.uk>
Date:   Fri, 20 Sep 2019 15:23:35 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "James Prestwood" <james.prestwood@...ux.intel.com>,
        "Bjorn Helgaas" <bhelgaas@...gle.com>
Subject: [PATCH 3.16 042/132] PCI: Mark Atheros AR9462 to avoid bus reset

3.16.74-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: James Prestwood <james.prestwood@...ux.intel.com>

commit 6afb7e26978da5e86e57e540fdce65c8b04f398a upstream.

When using PCI passthrough with this device, the host machine locks up
completely when starting the VM, requiring a hard reboot.  Add a quirk to
avoid bus resets on this device.

Fixes: c3e59ee4e766 ("PCI: Mark Atheros AR93xx to avoid bus reset")
Link: https://lore.kernel.org/linux-pci/20190107213248.3034-1-james.prestwood@linux.intel.com
Signed-off-by: James Prestwood <james.prestwood@...ux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/pci/quirks.c | 1 +
 1 file changed, 1 insertion(+)

--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3154,6 +3154,7 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_A
 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);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x0034, quirk_no_bus_reset);
 
 static void pci_do_fixups(struct pci_dev *dev, struct pci_fixup *f,
 			  struct pci_fixup *end)