USB: usb-skeleton: use anchors in pre/post reset

use anchors in pre/post_reset

Signed-off-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 23 insertions, 0 deletions

diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c
index 59973aecd968..8de11deb5d14 100644
--- a/drivers/usb/usb-skeleton.c
+++ b/drivers/usb/usb-skeleton.c
@@ -467,12 +467,35 @@ static int skel_resume (struct usb_interface *intf)
         return 0;
 }
 
+static int skel_pre_reset(struct usb_interface *intf)
+{
+        struct usb_skel *dev = usb_get_intfdata(intf);
+
+        mutex_lock(&dev->io_mutex);
+        skel_draw_down(dev);
+
+        return 0;
+}
+
+static int skel_post_reset(struct usb_interface *intf)
+{
+        struct usb_skel *dev = usb_get_intfdata(intf);
+
+        /* we are sure no URBs are active - no locking needed */
+        dev->errors = -EPIPE;
+        mutex_unlock(&dev->io_mutex);
+
+        return 0;
+}
+
 static struct usb_driver skel_driver = {
         .name =         "skeleton",
         .probe =        skel_probe,
         .disconnect =   skel_disconnect,
         .suspend =      skel_suspend,
         .resume =       skel_resume,
+        .pre_reset =    skel_pre_reset,
+        .post_reset =   skel_post_reset,
         .id_table =     skel_table,
         .supports_autosuspend = 1,
 };