[PATCH] USB: net2280: add a shutdown routine

The net2280 board has an annoying habit of surviving soft reboots with
interrupts enabled.  This patch (as674) adds a shutdown routine to the
driver so that the board can be put in a quiescent state.

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

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/usb/gadget/net2280.c b/drivers/usb/gadget/net2280.c
index 020d3c42b1af..1facdea56a8a 100644
--- a/drivers/usb/gadget/net2280.c
+++ b/drivers/usb/gadget/net2280.c
@@ -2966,6 +2966,22 @@ done:
         return retval;
 }
 
+/* make sure the board is quiescent; otherwise it will continue
+ * generating IRQs across the upcoming reboot.
+ */
+
+static void net2280_shutdown (struct pci_dev *pdev)
+{
+        struct net2280          *dev = pci_get_drvdata (pdev);
+
+        /* disable IRQs */
+        writel (0, &dev->regs->pciirqenb0);
+        writel (0, &dev->regs->pciirqenb1);
+
+        /* disable the pullup so the host will think we're gone */
+        writel (0, &dev->usb->usbctl);
+}
+
 
 /*-------------------------------------------------------------------------*/
 
@@ -2995,6 +3011,7 @@ static struct pci_driver net2280_pci_driver = {
 
         .probe =        net2280_probe,
         .remove =       net2280_remove,
+        .shutdown =     net2280_shutdown,
 
         /* FIXME add power management support */
 };