Skip ghost USB controllers

bus/pci.c

@@ -91,6 +91,14 @@ grub_pci_iterate (grub_pci_iteratefunc_t hook)
 	      if (id >> 16 == 0xFFFF)
 		continue;
 
+	      /* Skip ghosts.  */
+	      if (id == GRUB_YEELOONG_OHCI_PCIID
+		  && dev.function == GRUB_YEELOONG_OHCI_GHOST_FUNCTION)
+		continue;
+	      if (id == GRUB_YEELOONG_EHCI_PCIID
+		  && dev.function == GRUB_YEELOONG_EHCI_GHOST_FUNCTION)
+		continue;
+
 	      if (hook (dev, id))
 		return;
 

include/grub/mips/yeeloong/pci.h

@@ -24,6 +24,11 @@
 #include <grub/cpu/io.h>
 #endif
 
+#define GRUB_YEELOONG_OHCI_PCIID 0x00351033
+#define GRUB_YEELOONG_EHCI_PCIID 0x00e01033
+#define GRUB_YEELOONG_OHCI_GHOST_FUNCTION 4
+#define GRUB_YEELOONG_EHCI_GHOST_FUNCTION 5
+
 #define GRUB_PCI_NUM_BUS        1
 #define GRUB_PCI_NUM_DEVICES    16