This is a note to let you know that I've just added the patch titled PCI: Mark Atheros QCA6174 to avoid bus reset to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: pci-mark-atheros-qca6174-to-avoid-bus-reset.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From e3f4bd3462f6f796594ecc0dda7144ed2d1e5a26 Mon Sep 17 00:00:00 2001 From: Ingmar Klein <ingmar_klein@xxxxxx> Date: Fri, 9 Apr 2021 11:26:33 +0200 Subject: PCI: Mark Atheros QCA6174 to avoid bus reset MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 @@ -3169,6 +3169,7 @@ 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); /* * Some TI KeyStone C667X devices do not support bus/hot reset. The PCIESS Patches currently in stable-queue which might be from ingmar_klein@xxxxxx are queue-4.4/pci-mark-atheros-qca6174-to-avoid-bus-reset.patch