#include <linux/usb/input.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
+#include <linux/mutex.h>
/* USB HID defines */
#define USB_REQ_GET_REPORT 0x01
struct usb_device *usbdev;
struct usb_interface *intf;
struct urb *irq;
+
+ /* serialize access to open/suspend */
+ struct mutex pm_mutex;
+
char name[128];
char phys[64];
struct work_struct init;
if (error)
return error;
+ mutex_lock(&pegasus->pm_mutex);
pegasus->irq->dev = pegasus->usbdev;
if (usb_submit_urb(pegasus->irq, GFP_KERNEL)) {
error = -EIO;
if (error)
goto err_kill_urb;
+ mutex_unlock(&pegasus->pm_mutex);
return 0;
err_kill_urb:
usb_kill_urb(pegasus->irq);
cancel_work_sync(&pegasus->init);
err_autopm_put:
+ mutex_unlock(&pegasus->pm_mutex);
usb_autopm_put_interface(pegasus->intf);
return error;
}
{
struct pegasus *pegasus = input_get_drvdata(dev);
+ mutex_lock(&pegasus->pm_mutex);
usb_kill_urb(pegasus->irq);
cancel_work_sync(&pegasus->init);
+ mutex_unlock(&pegasus->pm_mutex);
+
usb_autopm_put_interface(pegasus->intf);
}
goto err_free_mem;
}
+ mutex_init(&pegasus->pm_mutex);
+
pegasus->usbdev = dev;
pegasus->dev = input_dev;
pegasus->intf = intf;
{
struct pegasus *pegasus = usb_get_intfdata(intf);
- mutex_lock(&pegasus->dev->mutex);
+ mutex_lock(&pegasus->pm_mutex);
usb_kill_urb(pegasus->irq);
cancel_work_sync(&pegasus->init);
- mutex_unlock(&pegasus->dev->mutex);
+ mutex_unlock(&pegasus->pm_mutex);
return 0;
}
struct pegasus *pegasus = usb_get_intfdata(intf);
int retval = 0;
- mutex_lock(&pegasus->dev->mutex);
+ mutex_lock(&pegasus->pm_mutex);
if (pegasus->dev->users && usb_submit_urb(pegasus->irq, GFP_NOIO) < 0)
retval = -EIO;
- mutex_unlock(&pegasus->dev->mutex);
+ mutex_unlock(&pegasus->pm_mutex);
return retval;
}
struct pegasus *pegasus = usb_get_intfdata(intf);
int retval = 0;
- mutex_lock(&pegasus->dev->mutex);
+ mutex_lock(&pegasus->pm_mutex);
if (pegasus->dev->users) {
retval = pegasus_set_mode(pegasus, PEN_MODE_XY,
NOTETAKER_LED_MOUSE);
if (!retval && usb_submit_urb(pegasus->irq, GFP_NOIO) < 0)
retval = -EIO;
}
- mutex_unlock(&pegasus->dev->mutex);
+ mutex_unlock(&pegasus->pm_mutex);
return retval;
}