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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        James Prestwood <james.prestwood@linux.intel.com>,
        Bjorn Helgaas <bhelgaas@google.com>
Subject: [PATCH 4.19 071/114] PCI: Mark Atheros AR9462 to avoid bus reset
Date:   Thu, 23 May 2019 21:06:10 +0200
Message-Id: <20190523181738.184583032@linuxfoundation.org>
In-Reply-To: <20190523181731.372074275@linuxfoundation.org>
References: <20190523181731.372074275@linuxfoundation.org>
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From: James Prestwood <james.prestwood@linux.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@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: stable@vger.kernel.org	# v3.14+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/pci/quirks.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3383,6 +3383,7 @@ 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);
 
 /*
  * Root port on some Cavium CN8xxx chips do not successfully complete a bus