/** Free each QTD in the QH's QTD-list then free the QH. QH should already be
* removed from a list. QTD list should already be empty if called from URB
* Dequeue.
*
* @param[in] hcd HCD instance.
* @param[in] qh The QH to free.
*/
void dwc_otg_hcd_qh_free (dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
{
dwc_otg_qtd_t *qtd;
struct list_head *pos;
unsigned long flags;
/* Free each QTD in the QTD list */
SPIN_LOCK_IRQSAVE(&hcd->lock, flags)
for (pos = qh->qtd_list.next;
pos != &qh->qtd_list;
pos = qh->qtd_list.next)
{
list_del (pos);
qtd = dwc_list_to_qtd (pos);
dwc_otg_hcd_qtd_free (qtd);
}
SPIN_UNLOCK_IRQRESTORE(&hcd->lock, flags)
if (qh->dw_align_buf) {
dma_free_coherent((dwc_otg_hcd_to_hcd(hcd))->self.controller,
hcd->core_if->core_params->max_transfer_size,
qh->dw_align_buf,
qh->dw_align_buf_dma);
}
kfree (qh);
return;
}
/** Free each QTD in the QH's QTD-list then free the QH. QH should already be
* removed from a list. QTD list should already be empty if called from URB
* Dequeue.
*
* @param[in] hcd HCD instance.
* @param[in] qh The QH to free.
*/
void dwc_otg_hcd_qh_free (dwc_otg_hcd_t *hcd, dwc_otg_qh_t *qh)
{
dwc_otg_qtd_t *qtd;
struct list_head *pos;
//unsigned long flags;
/* Free each QTD in the QTD list */
#ifdef CONFIG_SMP
//the spinlock is locked before this function get called,
//but in case the lock is needed, the check function is preserved
//but in non-SMP mode, all spinlock is lockable.
//don't do the test in non-SMP mode
if(spin_trylock(&hcd->lock)) {
printk("%s: It is not supposed to be lockable!!\n",__func__);
BUG();
}
#endif
// SPIN_LOCK_IRQSAVE(&hcd->lock, flags)
for (pos = qh->qtd_list.next;
pos != &qh->qtd_list;
pos = qh->qtd_list.next)
{
list_del (pos);
qtd = dwc_list_to_qtd (pos);
dwc_otg_hcd_qtd_free (qtd);
}
// SPIN_UNLOCK_IRQRESTORE(&hcd->lock, flags)
kfree (qh);
return;
}
/** Free each QTD in the QH's QTD-list then free the QH. QH should already be
* removed from a list. QTD list should already be empty if called from URB
* Dequeue.
*
* @param[in] _qh The QH to free.
*/
void dwc_otg_hcd_qh_free (dwc_otg_qh_t *_qh)
{
dwc_otg_qtd_t *qtd;
struct list_head *pos;
unsigned long flags;
local_irq_save(flags);
/* Free each QTD in the QTD list */
for (pos = _qh->qtd_list.next;
pos != &_qh->qtd_list;
pos = _qh->qtd_list.next)
{
list_del (pos);
qtd = dwc_list_to_qtd (pos);
if(qtd->urb)
{
qtd->urb->hcpriv =NULL;
qtd->urb->ep->hcpriv = NULL;
}
dwc_otg_hcd_qtd_free (qtd);
qtd=NULL;
}
kfree (_qh);
_qh = NULL;
local_irq_restore(flags);
return;
}
/** Free each QTD in the QH's QTD-list then free the QH. QH should already be
* removed from a list. QTD list should already be empty if called from URB
* Dequeue.
*
* @param[in] _qh The QH to free.
*/
void dwc_otg_hcd_qh_free(dwc_otg_qh_t * _qh)
{
dwc_otg_qtd_t * qtd;
struct list_head *pos;
unsigned long flags;
/* Free each QTD in the QTD list */
local_irq_save(flags);
for (pos = _qh->qtd_list.next; pos != &_qh->qtd_list;
pos = _qh->qtd_list.next) {
list_del(pos);
qtd = dwc_list_to_qtd(pos);
dwc_otg_hcd_qtd_free(qtd);
}
local_irq_restore(flags);
kfree(_qh);
return;
}
