Merge tag 'v3.10.71' into update

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / usb / core / hcd.c

diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index cbfd3d14fa5aad4c5ef5b19615391893f468d6bd..ad6b50cca19f509d3d6c0f47744f78d106aa4d2a 100644 (file)
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -699,18 +699,30 @@ void usb_hcd_poll_rh_status(struct usb_hcd *hcd)
        unsigned long   flags;
        char            buffer[6];      /* Any root hubs with > 31 ports? */
 
+       MYDBG("");
+
        if (unlikely(!hcd->rh_pollable))
+       {
+               MYDBG("");
                return;
+       }
        if (!hcd->uses_new_polling && !hcd->status_urb)
+       {
+               MYDBG("");
                return;
+       }
 
+       MYDBG("");
        length = hcd->driver->hub_status_data(hcd, buffer);
+       MYDBG("");
        if (length > 0) {
+               MYDBG("");
 
                /* try to complete the status urb */
                spin_lock_irqsave(&hcd_root_hub_lock, flags);
                urb = hcd->status_urb;
                if (urb) {
+                       MYDBG("");
                        clear_bit(HCD_FLAG_POLL_PENDING, &hcd->flags);
                        hcd->status_urb = NULL;
                        urb->actual_length = length;
@@ -721,11 +733,13 @@ void usb_hcd_poll_rh_status(struct usb_hcd *hcd)
                        usb_hcd_giveback_urb(hcd, urb, 0);
                        spin_lock(&hcd_root_hub_lock);
                } else {
+                       MYDBG("");
                        length = 0;
                        set_bit(HCD_FLAG_POLL_PENDING, &hcd->flags);
                }
                spin_unlock_irqrestore(&hcd_root_hub_lock, flags);
        }
+       MYDBG("");
 
        /* The USB 2.0 spec says 256 ms.  This is close enough and won't
         * exceed that limit if HZ is 100. The math is more clunky than
@@ -733,7 +747,10 @@ void usb_hcd_poll_rh_status(struct usb_hcd *hcd)
         * fire at the same time to give the CPU a break in between */
        if (hcd->uses_new_polling ? HCD_POLL_RH(hcd) :
                        (length == 0 && hcd->status_urb != NULL))
+       {
+               MYDBG("");
                mod_timer (&hcd->rh_timer, (jiffies/(HZ/4) + 1) * (HZ/4));
+       }
 }
 EXPORT_SYMBOL_GPL(usb_hcd_poll_rh_status);