[PATCH] USB UHCI: Minor improvements

This patch makes a few small improvements in the UHCI driver.  Some
code is moved between different source files and a more useful pointer
is passed to a callback routine.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/usb/host/uhci-hub.c b/drivers/usb/host/uhci-hub.c
index 4c45ba8390f8..ddb19cbf4b75 100644
--- a/drivers/usb/host/uhci-hub.c
+++ b/drivers/usb/host/uhci-hub.c
@@ -33,6 +33,22 @@ static __u8 root_hub_hub_des[] =
 /* status change bits:  nonzero writes will clear */
 #define RWC_BITS        (USBPORTSC_OCC | USBPORTSC_PEC | USBPORTSC_CSC)
 
+/* A port that either is connected or has a changed-bit set will prevent
+ * us from AUTO_STOPPING.
+ */
+static int any_ports_active(struct uhci_hcd *uhci)
+{
+        int port;
+
+        for (port = 0; port < uhci->rh_numports; ++port) {
+                if ((inw(uhci->io_addr + USBPORTSC1 + port * 2) &
+                                (USBPORTSC_CCS | RWC_BITS)) ||
+                                test_bit(port, &uhci->port_c_suspend))
+                        return 1;
+        }
+        return 0;
+}
+
 static int uhci_hub_status_data(struct usb_hcd *hcd, char *buf)
 {
         struct uhci_hcd *uhci = hcd_to_uhci(hcd);