UHCI: module parameter to ignore overcurrent changes

[powerpc.git] / drivers / usb / host / uhci-hcd.c

diff --git a/drivers/usb/host/uhci-hcd.c b/drivers/usb/host/uhci-hcd.c
index e87692c..acd101c 100644 (file)
--- a/drivers/usb/host/uhci-hcd.c
+++ b/drivers/usb/host/uhci-hcd.c
@@ -60,6 +60,11 @@ Randy Dunlap, Georg Acher, Deti Fliegl, Thomas Sailer, Roman Weissgaerber, \
 Alan Stern"
 #define DRIVER_DESC "USB Universal Host Controller Interface driver"
 
+/* for flakey hardware, ignore overcurrent indicators */
+static int ignore_oc;
+module_param(ignore_oc, bool, S_IRUGO);
+MODULE_PARM_DESC(ignore_oc, "ignore hardware overcurrent indications");
+
 /*
  * debug = 0, no debugging messages
  * debug = 1, dump failed URBs except for stalls
@@ -169,6 +174,11 @@ static int resume_detect_interrupts_are_broken(struct uhci_hcd *uhci)
 {
        int port;
 
+       /* If we have to ignore overcurrent events then almost by definition
+        * we can't depend on resume-detect interrupts. */
+       if (ignore_oc)
+               return 1;
+
        switch (to_pci_dev(uhci_dev(uhci))->vendor) {
            default:
                break;
@@ -921,7 +931,8 @@ static int __init uhci_hcd_init(void)
 {
        int retval = -ENOMEM;
 
-       printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION "\n");
+       printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION "%s\n",
+                       ignore_oc ? ", overcurrent ignored" : "");
 
        if (usb_disabled())
                return -ENODEV;