PCI: Mark TI C667X to avoid bus reset
commit b5cf198e upstream. Some TI KeyStone C667X devices do not support bus/hot reset. The PCIESS automatically disables LTSSM when Secondary Bus Reset is received and device stops working. Prevent bus reset for these devices. With this change, the device can be assigned to VMs with VFIO, but it will leak state between VMs. Reference: https://e2e.ti.com/support/processors/f/791/t/954382 Link: https://lore.kernel.org/r/20210315102606.17153-1-antti.jarvinen@gmail.com Signed-off-by:Antti Järvinen <antti.jarvinen@gmail.com> Signed-off-by:
Bjorn Helgaas <bhelgaas@google.com> Reviewed-by:
Kishon Vijay Abraham I <kishon@ti.com> Cc: stable@vger.kernel.org Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
43e1f748
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