176,12 → 176,17 |
irq = irq_find_and_lock(inr, devno); |
if (irq) { |
if (irq->notif_cfg.answerbox == box) { |
code_free(irq->notif_cfg.code); |
irq->notif_cfg.notify = false; |
irq->notif_cfg.answerbox = NULL; |
irq->notif_cfg.code = NULL; |
irq->notif_cfg.method = 0; |
irq->notif_cfg.counter = 0; |
code_free(irq->notif_cfg.code); |
|
spinlock_lock(&box->irq_lock); |
list_remove(&irq->notif_cfg.link); |
spinlock_unlock(&box->irq_lock); |
|
spinlock_unlock(&irq->lock); |
} |
} |
198,8 → 203,7 |
* |
* @return EBADMEM, ENOENT or EEXISTS on failure or 0 on success. |
*/ |
int |
ipc_irq_register(answerbox_t *box, inr_t inr, devno_t devno, unative_t method, irq_code_t *ucode) |
int ipc_irq_register(answerbox_t *box, inr_t inr, devno_t devno, unative_t method, irq_code_t *ucode) |
{ |
ipl_t ipl; |
irq_code_t *code; |
232,6 → 236,11 |
irq->notif_cfg.method = method; |
irq->notif_cfg.code = code; |
irq->notif_cfg.counter = 0; |
|
spinlock_lock(&box->irq_lock); |
list_append(&irq->notif_cfg.link, &box->irq_head); |
spinlock_unlock(&box->irq_lock); |
|
spinlock_unlock(&irq->lock); |
interrupts_restore(ipl); |
|
310,12 → 319,55 |
|
/** Disconnect all IRQ notifications from an answerbox. |
* |
* This function is effective because the answerbox contains |
* list of all irq_t structures that are registered to |
* send notifications to it. |
* |
* @param box Answerbox for which we want to carry out the cleanup. |
*/ |
void ipc_irq_cleanup(answerbox_t *box) |
{ |
/* TODO */ |
ipl_t ipl; |
|
loop: |
ipl = interrupts_disable(); |
spinlock_lock(&box->irq_lock); |
|
while (box->irq_head.next != &box->irq_head) { |
link_t *cur = box->irq_head.next; |
irq_t *irq; |
|
irq = list_get_instance(cur, irq_t, notif_cfg.link); |
if (!spinlock_trylock(&irq->lock)) { |
/* |
* Avoid deadlock by trying again. |
*/ |
spinlock_unlock(&box->irq_lock); |
interrupts_restore(ipl); |
goto loop; |
} |
|
ASSERT(irq->notif_cfg.answerbox == box); |
|
list_remove(&irq->notif_cfg.link); |
|
/* |
* Don't forget to free any top-half pseudocode. |
*/ |
code_free(irq->notif_cfg.code); |
|
irq->notif_cfg.notify = false; |
irq->notif_cfg.answerbox = NULL; |
irq->notif_cfg.code = NULL; |
irq->notif_cfg.method = 0; |
irq->notif_cfg.counter = 0; |
|
spinlock_unlock(&irq->lock); |
} |
|
spinlock_unlock(&box->irq_lock); |
interrupts_restore(ipl); |
} |
|
/** @} |
*/ |