USB: OHCI: fix root-hub resume bug

When a suspended OHCI controller sees a port's status change, it sets
both the Root-Hub-Status-Change and the Resume-Detect bits in the
Interrupt Status register.  Processing both these bits, the driver
tries to resume the root hub twice!

This patch (as807) fixes the bug by ignoring RD if RHSC is set.  It
also prints a slightly more informative log message when a
remote-wakeup event occurs.

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

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/usb/host/ohci-hub.c b/drivers/usb/host/ohci-hub.c
index da09e7930c1b..6995ea36f2e8 100644
--- a/drivers/usb/host/ohci-hub.c
+++ b/drivers/usb/host/ohci-hub.c
@@ -169,7 +169,8 @@ __acquires(ohci->lock)
                 break;
         case OHCI_USB_RESUME:
                 /* HCFS changes sometime after INTR_RD */
-                ohci_info (ohci, "wakeup\n");
+                ohci_info(ohci, "%swakeup\n",
+                                autostopped ? "auto-" : "");
                 break;
         case OHCI_USB_OPER:
                 /* this can happen after resuming a swsusp snapshot */