[PATCH 5.10 099/575] PCI: Mark Atheros QCA6174 to avoid bus reset

From: Greg Kroah-Hartman
Date: Mon Nov 15 2021 - 14:26:08 EST


From: Ingmar Klein <ingmar_klein@xxxxxx>

commit e3f4bd3462f6f796594ecc0dda7144ed2d1e5a26 upstream.

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@xxxxxx
Signed-off-by: Ingmar Klein <ingmar_klein@xxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Reviewed-by: Pali Rohár <pali@xxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/pci/quirks.c | 1 +
1 file changed, 1 insertion(+)

--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3584,6 +3584,7 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_A
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