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# T2 SDE: package/*/linux/hotfix-fw643-reset.patch
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diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index d797df6e5f3e..e0e4ad9e6d50 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -3765,6 +3765,19 @@  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 exhaust all
+ * pci_reset_fn_methods, the bus reset at the end causes 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.
+ * Note that it will not be reset, resulting in leaking state between VMs
+ * and host.
+ */
+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