3 files changed, 12 insertions, 8 deletions
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index abea48de8766..884179f1e163 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -970,7 +970,7 @@ static int autosuspend_check(struct usb_device *udev)
 	udev->do_remote_wakeup = device_may_wakeup(&udev->dev);
 	if (udev->pm_usage_cnt > 0)
 		return -EBUSY;
-	if (!udev->autosuspend_delay)
+	if (udev->autosuspend_delay < 0)
 		return -EPERM;
 
 	if (udev->actconfig) {
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 311d5df80386..731001f7d2c1 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -165,7 +165,7 @@ show_autosuspend(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	struct usb_device *udev = to_usb_device(dev);
 
-	return sprintf(buf, "%u\n", udev->autosuspend_delay / HZ);
+	return sprintf(buf, "%d\n", udev->autosuspend_delay / HZ);
 }
 
 static ssize_t
@@ -173,17 +173,21 @@ set_autosuspend(struct device *dev, struct device_attribute *attr,
 		const char *buf, size_t count)
 {
 	struct usb_device *udev = to_usb_device(dev);
-	unsigned value, old;
+	int value;
 
-	if (sscanf(buf, "%u", &value) != 1 || value >= INT_MAX/HZ)
+	if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/HZ ||
+			value <= - INT_MAX/HZ)
 		return -EINVAL;
 	value *= HZ;
 
-	old = udev->autosuspend_delay;
 	udev->autosuspend_delay = value;
-	if (value > 0 && old == 0)
+	if (value >= 0)
 		usb_try_autosuspend_device(udev);
-
+	else {
+		usb_lock_device(udev);
+		usb_external_resume_device(udev);
+		usb_unlock_device(udev);
+	}
 	return count;
 }
 
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 138252e0a1cf..6f35dce8a95d 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -55,7 +55,7 @@ struct workqueue_struct *ksuspend_usb_wq;
 #ifdef	CONFIG_USB_SUSPEND
 static int usb_autosuspend_delay = 2;		/* Default delay value,
 						 * in seconds */
-module_param_named(autosuspend, usb_autosuspend_delay, uint, 0644);
+module_param_named(autosuspend, usb_autosuspend_delay, int, 0644);
 MODULE_PARM_DESC(autosuspend, "default autosuspend delay");
 
 #else