Using LSI / Agere FW643 with vfio-pci will issue an FLreset, causing a broken link only recoverable by removing power (power-off / suspend + rescan). Prevent this bus reset. With this change, the device can be assigned to VMs with VFIO. Signed-off-by: Edmund Raile <edmund.raile@xxxxxxxxx> --- Usefulness: The LSI FW643 PCIe->FireWire 800 interface may be EOL but it is the only one that does not use a PCIe->PCI bridge. It was used in the following Apple machines: MacBookPro10,1 MacBookPro9,2 MacBookPro6,2 MacBookPro5,1 Macmini6,1 Macmini3,1 iMac12,2 iMac9,1 iMac8,1 It is reliable and enables FireWire audio interfaces to be used on modern machines. Virtualization allows for flexible access to professional audio software. Implementation: PCI_VENDOR_ID_ATT was reused as they are identical and I am uncertain it is correct to add another ID for LSI to pci_ids.h. drivers/pci/quirks.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index d797df6e5f3e..a6747e1b86da 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3765,6 +3765,15 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATHEROS, 0x003e, quirk_no_bus_reset); */ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_CAVIUM, 0xa100, quirk_no_bus_reset); +/* + * Using LSI / Agere FW643 with vfio-pci will issue an FLreset, causing + * a broken link only recoverable by removing power (power-off / + * suspend + rescan). Prevent this bus reset. + * With this change, the device can be assigned to VMs with VFIO. + */ +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATT, 0x5900, quirk_no_bus_reset); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATT, 0x5901, quirk_no_bus_reset); + /* * Some TI KeyStone C667X devices do not support bus/hot reset. The PCIESS * automatically disables LTSSM when Secondary Bus Reset is received and -- 2.43.0
