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path: root/drivers/usb/core/usb.c
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Diffstat (limited to 'drivers/usb/core/usb.c')
-rw-r--r--drivers/usb/core/usb.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 3db721cd557..54b42ce311c 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -22,6 +22,7 @@
*/
#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <linux/string.h>
#include <linux/bitops.h>
#include <linux/slab.h>
@@ -50,6 +51,16 @@ static int nousb; /* Disable USB when built into kernel image */
struct workqueue_struct *ksuspend_usb_wq; /* For autosuspend */
+#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_PARM_DESC(autosuspend, "default autosuspend delay");
+
+#else
+#define usb_autosuspend_delay 0
+#endif
+
/**
* usb_ifnum_to_if - get the interface object with a given interface number
@@ -306,6 +317,7 @@ usb_alloc_dev(struct usb_device *parent, struct usb_bus *bus, unsigned port1)
#ifdef CONFIG_PM
mutex_init(&dev->pm_mutex);
INIT_DELAYED_WORK(&dev->autosuspend, usb_autosuspend_work);
+ dev->autosuspend_delay = usb_autosuspend_delay * HZ;
#endif
return dev;
}