USB: sa1111: add OHCI shutdown methods

Add OHCI shutdown methods to cleanly shutdown the OHCI controller on
system shutdowns and reboots.  This avoids the controller continuing
to run should be soft-reboot the platform, potentially scribbling
over system memory.

Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/usb/host/ohci-sa1111.c b/drivers/usb/host/ohci-sa1111.c
index 83f3a40db538..95c3f0fb48d3 100644
--- a/drivers/usb/host/ohci-sa1111.c
+++ b/drivers/usb/host/ohci-sa1111.c
@@ -89,6 +89,7 @@ static const struct hc_driver ohci_sa1111_hc_driver = {
          */
         .start =                ohci_sa1111_start,
         .stop =                 ohci_stop,
+        .shutdown =             ohci_shutdown,
 
         /*
          * managing i/o requests and associated device resources
@@ -232,6 +233,16 @@ static int ohci_hcd_sa1111_remove(struct sa1111_dev *dev)
         return 0;
 }
 
+static void ohci_hcd_sa1111_shutdown(struct sa1111_dev *dev)
+{
+        struct usb_hcd *hcd = sa1111_get_drvdata(dev);
+
+        if (test_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags)) {
+                hcd->driver->shutdown(hcd);
+                sa1111_stop_hc(dev);
+        }
+}
+
 static struct sa1111_driver ohci_hcd_sa1111_driver = {
         .drv = {
                 .name   = "sa1111-ohci",
@@ -240,4 +251,5 @@ static struct sa1111_driver ohci_hcd_sa1111_driver = {
         .devid          = SA1111_DEVID_USB,
         .probe          = ohci_hcd_sa1111_probe,
         .remove         = ohci_hcd_sa1111_remove,
+        .shutdown       = ohci_hcd_sa1111_shutdown,
 };