diff options
Diffstat (limited to 'drivers/input/tablet')
| -rw-r--r-- | drivers/input/tablet/pegasus_notetaker.c | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/drivers/input/tablet/pegasus_notetaker.c b/drivers/input/tablet/pegasus_notetaker.c index 47de5a81172f..ffd03cfe3131 100644 --- a/drivers/input/tablet/pegasus_notetaker.c +++ b/drivers/input/tablet/pegasus_notetaker.c @@ -41,6 +41,7 @@ #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 @@ -76,6 +77,11 @@ struct pegasus { struct usb_device *usbdev; struct usb_interface *intf; struct urb *irq; + + /* serialize access to open/suspend */ + struct mutex pm_mutex; + bool is_open; + char name[128]; char phys[64]; struct work_struct init; @@ -216,6 +222,7 @@ static int pegasus_open(struct input_dev *dev) if (error) return error; + mutex_lock(&pegasus->pm_mutex); pegasus->irq->dev = pegasus->usbdev; if (usb_submit_urb(pegasus->irq, GFP_KERNEL)) { error = -EIO; @@ -226,12 +233,15 @@ static int pegasus_open(struct input_dev *dev) if (error) goto err_kill_urb; + pegasus->is_open = true; + 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; } @@ -240,8 +250,12 @@ static void pegasus_close(struct input_dev *dev) { struct pegasus *pegasus = input_get_drvdata(dev); + mutex_lock(&pegasus->pm_mutex); usb_kill_urb(pegasus->irq); cancel_work_sync(&pegasus->init); + pegasus->is_open = false; + mutex_unlock(&pegasus->pm_mutex); + usb_autopm_put_interface(pegasus->intf); } @@ -274,6 +288,8 @@ static int pegasus_probe(struct usb_interface *intf, goto err_free_mem; } + mutex_init(&pegasus->pm_mutex); + pegasus->usbdev = dev; pegasus->dev = input_dev; pegasus->intf = intf; @@ -388,10 +404,10 @@ static int pegasus_suspend(struct usb_interface *intf, pm_message_t message) { 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; } @@ -401,10 +417,10 @@ static int pegasus_resume(struct usb_interface *intf) struct pegasus *pegasus = usb_get_intfdata(intf); int retval = 0; - mutex_lock(&pegasus->dev->mutex); - if (pegasus->dev->users && usb_submit_urb(pegasus->irq, GFP_NOIO) < 0) + mutex_lock(&pegasus->pm_mutex); + if (pegasus->is_open && usb_submit_urb(pegasus->irq, GFP_NOIO) < 0) retval = -EIO; - mutex_unlock(&pegasus->dev->mutex); + mutex_unlock(&pegasus->pm_mutex); return retval; } @@ -414,14 +430,14 @@ static int pegasus_reset_resume(struct usb_interface *intf) struct pegasus *pegasus = usb_get_intfdata(intf); int retval = 0; - mutex_lock(&pegasus->dev->mutex); - if (pegasus->dev->users) { + mutex_lock(&pegasus->pm_mutex); + if (pegasus->is_open) { 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; } |