Input: bcm5974 - implement autosuspend support

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/input/mouse/bcm5974.c b/drivers/input/mouse/bcm5974.c
index 6f852786c52..2ec921bf3c6 100644
--- a/drivers/input/mouse/bcm5974.c
+++ b/drivers/input/mouse/bcm5974.c
@@ -150,6 +150,7 @@ struct bcm5974_config {
 struct bcm5974 {
         char phys[64];
         struct usb_device *udev;        /* usb device */
+        struct usb_interface *intf;     /* our interface */
         struct input_dev *input;        /* input dev */
         struct bcm5974_config cfg;      /* device configuration */
         struct mutex pm_mutex;          /* serialize access to open/suspend */
@@ -478,6 +479,10 @@ static int bcm5974_open(struct input_dev *input)
         struct bcm5974 *dev = input_get_drvdata(input);
         int error;
 
+        error = usb_autopm_get_interface(dev->intf);
+        if (error)
+                return error;
+
         mutex_lock(&dev->pm_mutex);
 
         error = bcm5974_start_traffic(dev);
@@ -486,6 +491,9 @@ static int bcm5974_open(struct input_dev *input)
 
         mutex_unlock(&dev->pm_mutex);
 
+        if (error)
+                usb_autopm_put_interface(dev->intf);
+
         return error;
 }
 
@@ -499,6 +507,8 @@ static void bcm5974_close(struct input_dev *input)
         dev->opened = 0;
 
         mutex_unlock(&dev->pm_mutex);
+
+        usb_autopm_put_interface(dev->intf);
 }
 
 static int bcm5974_suspend(struct usb_interface *iface, pm_message_t message)
@@ -551,6 +561,7 @@ static int bcm5974_probe(struct usb_interface *iface,
         }
 
         dev->udev = udev;
+        dev->intf = iface;
         dev->input = input_dev;
         dev->cfg = *cfg;
         mutex_init(&dev->pm_mutex);
@@ -652,6 +663,7 @@ static struct usb_driver bcm5974_driver = {
         .resume                 = bcm5974_resume,
         .reset_resume           = bcm5974_resume,
         .id_table               = bcm5974_table,
+        .supports_autosuspend   = 1,
 };
 
 static int __init bcm5974_init(void)