From 62ecae09a01df507ef52e1bc90fc233a1978c60a Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Sun, 10 Oct 2010 14:24:16 -0700 Subject: [PATCH] Input: wacom - properly enable runtime PM We need to always call usb_autopm_put_interface() in wacom_open(), not only when initialization fails, otherwise the device will be marked as PM-busy and will never be put in suspended state. Based on patch by Oliver Neukum. Acked-by: Oliver Neukum Signed-off-by: Dmitry Torokhov --- drivers/input/tablet/wacom_sys.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/input/tablet/wacom_sys.c b/drivers/input/tablet/wacom_sys.c index 02de653..fc38149 100644 --- a/drivers/input/tablet/wacom_sys.c +++ b/drivers/input/tablet/wacom_sys.c @@ -120,14 +120,16 @@ static int wacom_open(struct input_dev *dev) out: mutex_unlock(&wacom->lock); - if (retval) - usb_autopm_put_interface(wacom->intf); + usb_autopm_put_interface(wacom->intf); return retval; } static void wacom_close(struct input_dev *dev) { struct wacom *wacom = input_get_drvdata(dev); + int autopm_error; + + autopm_error = usb_autopm_get_interface(wacom->intf); mutex_lock(&wacom->lock); usb_kill_urb(wacom->irq); @@ -135,7 +137,8 @@ static void wacom_close(struct input_dev *dev) wacom->intf->needs_remote_wakeup = 0; mutex_unlock(&wacom->lock); - usb_autopm_put_interface(wacom->intf); + if (!autopm_error) + usb_autopm_put_interface(wacom->intf); } static int wacom_parse_hid(struct usb_interface *intf, struct hid_descriptor *hid_desc, -- 2.7.4