From e3f4bd3462f6f796594ecc0dda7144ed2d1e5a26 Mon Sep 17 00:00:00 2001
From: Ingmar Klein <ingmar_klein@web.de>
Date: Fri, 9 Apr 2021 11:26:33 +0200
Subject: [PATCH] PCI: Mark Atheros QCA6174 to avoid bus reset
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Git-commit: e3f4bd3462f6f796594ecc0dda7144ed2d1e5a26
References: git-fixes stable-5.14.19
Patch-mainline: v5.16-rc1

When passing the Atheros QCA6174 through to a virtual machine, the VM hangs
at the point where the ath10k driver loads.

Add a quirk to avoid bus resets on this device, which avoids the hang.

[bhelgaas: commit log]
Link: https://lore.kernel.org/r/08982e05-b6e8-5a8d-24ab-da1488ee50a8@web.de
Signed-off-by: Ingmar Klein <ingmar_klein@web.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Pali Rohár <pali@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
 drivers/pci/quirks.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 4537d1ea14fd..6c957124f84d 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3612,6 +3612,7 @@ 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);
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x003e, quirk_no_bus_reset);
 
 /*
  * Root port on some Cavium CN8xxx chips do not successfully complete a bus
-- 
2.26.2