#include <linux/mmu_context.h>
#include <linux/aio.h>
#include <linux/uio.h>
-
+#include <linux/delay.h>
#include <linux/device.h>
#include <linux/moduleparam.h>
struct dev_data {
spinlock_t lock;
atomic_t count;
+ int udc_usage;
enum ep0_state state; /* P: lock */
struct usb_gadgetfs_event event [N_EVENT];
unsigned ev_next;
INIT_WORK(&priv->work, ep_user_copy_worker);
schedule_work(&priv->work);
}
- spin_unlock(&epdata->dev->lock);
usb_ep_free_request(ep, req);
+ spin_unlock(&epdata->dev->lock);
put_ep(epdata);
}
struct usb_request *req = dev->req;
if ((retval = setup_req (ep, req, 0)) == 0) {
+ ++dev->udc_usage;
spin_unlock_irq (&dev->lock);
retval = usb_ep_queue (ep, req, GFP_KERNEL);
spin_lock_irq (&dev->lock);
+ --dev->udc_usage;
}
dev->state = STATE_DEV_CONNECTED;
retval = setup_req (dev->gadget->ep0, dev->req, len);
if (retval == 0) {
dev->state = STATE_DEV_CONNECTED;
+ ++dev->udc_usage;
spin_unlock_irq (&dev->lock);
if (copy_from_user (dev->req->buf, buf, len))
retval = -EFAULT;
GFP_KERNEL);
}
spin_lock_irq(&dev->lock);
+ --dev->udc_usage;
if (retval < 0) {
clean_req (dev->gadget->ep0, dev->req);
} else
struct usb_gadget *gadget = dev->gadget;
long ret = -ENOTTY;
- if (gadget->ops->ioctl)
+ spin_lock_irq(&dev->lock);
+ if (dev->state == STATE_DEV_OPENED ||
+ dev->state == STATE_DEV_UNBOUND) {
+ /* Not bound to a UDC */
+ } else if (gadget->ops->ioctl) {
+ ++dev->udc_usage;
+ spin_unlock_irq(&dev->lock);
+
ret = gadget->ops->ioctl (gadget, code, value);
+ spin_lock_irq(&dev->lock);
+ --dev->udc_usage;
+ }
+ spin_unlock_irq(&dev->lock);
+
return ret;
}
if (value < 0)
break;
+ ++dev->udc_usage;
spin_unlock (&dev->lock);
value = usb_ep_queue (gadget->ep0, dev->req,
GFP_KERNEL);
spin_lock (&dev->lock);
+ --dev->udc_usage;
if (value < 0) {
clean_req (gadget->ep0, dev->req);
break;
req->length = value;
req->zero = value < w_length;
+ ++dev->udc_usage;
spin_unlock (&dev->lock);
value = usb_ep_queue (gadget->ep0, req, GFP_KERNEL);
+ spin_lock(&dev->lock);
+ --dev->udc_usage;
+ spin_unlock(&dev->lock);
if (value < 0) {
DBG (dev, "ep_queue --> %d\n", value);
req->status = 0;
/* break link to FS */
ep = list_first_entry (&dev->epfiles, struct ep_data, epfiles);
list_del_init (&ep->epfiles);
+ spin_unlock_irq (&dev->lock);
+
dentry = ep->dentry;
ep->dentry = NULL;
parent = d_inode(dentry->d_parent);
/* break link to controller */
+ mutex_lock(&ep->lock);
if (ep->state == STATE_EP_ENABLED)
(void) usb_ep_disable (ep->ep);
ep->state = STATE_EP_UNBOUND;
usb_ep_free_request (ep->ep, ep->req);
ep->ep = NULL;
+ mutex_unlock(&ep->lock);
+
wake_up (&ep->wait);
put_ep (ep);
- spin_unlock_irq (&dev->lock);
-
/* break link to dcache */
mutex_lock (&parent->i_mutex);
d_delete (dentry);
spin_lock_irq (&dev->lock);
dev->state = STATE_DEV_UNBOUND;
+ while (dev->udc_usage > 0) {
+ spin_unlock_irq(&dev->lock);
+ usleep_range(1000, 2000);
+ spin_lock_irq(&dev->lock);
+ }
spin_unlock_irq (&dev->lock);
destroy_ep_files (dev);