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USBUS CDC ACM: disable interrupts when using tsrb

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This commit is contained in:
Antonio Galea 2019-10-10 08:26:45 +02:00
parent 01c3043f6f
commit 6c04cb1a45
1 changed files with 14 additions and 4 deletions
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18
sys/usb/usbus/cdc/acm/cdc_acm.c
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@ -126,11 +126,17 @@ static size_t _gen_full_acm_descriptor(usbus_t *usbus, void *arg)
/* Submit (ACM interface in) */
size_t usbus_cdc_acm_submit(usbus_cdcacm_device_t *cdcacm, const uint8_t *buf, size_t len)
{
size_t n;
unsigned old;
if (cdcacm->state != USBUS_CDC_ACM_LINE_STATE_DISCONNECTED) {
return tsrb_add(&cdcacm->tsrb, buf, len);
old = irq_disable();
n = tsrb_add(&cdcacm->tsrb, buf, len);
irq_restore(old);
return n;
}
/* stuff as much data as possible into tsrb, discarding the oldest */
size_t n = tsrb_free(&cdcacm->tsrb);
old = irq_disable();
n = tsrb_free(&cdcacm->tsrb);
if (len > n) {
n += tsrb_drop(&cdcacm->tsrb, len - n);
buf += len - n;
@ -139,15 +145,16 @@ size_t usbus_cdc_acm_submit(usbus_cdcacm_device_t *cdcacm, const uint8_t *buf, s
}
tsrb_add(&cdcacm->tsrb, buf, n);
/* behave as if everything has been written correctly */
irq_restore(old);
return len;
}
void usbus_cdc_acm_set_coding_cb(usbus_cdcacm_device_t *cdcacm,
usbus_cdcacm_coding_cb_t coding_cb)
{
irq_disable();
unsigned old = irq_disable();
cdcacm->coding_cb = coding_cb;
irq_enable();
irq_restore(old);
}
/* flush event */
@ -286,6 +293,8 @@ static void _handle_in(usbus_cdcacm_device_t *cdcacm,
(cdcacm->state != USBUS_CDC_ACM_LINE_STATE_DTE)) {
return;
}
/* copy at most USBUS_CDC_ACM_BULK_EP_SIZE chars from input into ep->buf */
unsigned old = irq_disable();
while (!tsrb_empty(&cdcacm->tsrb)) {
int c = tsrb_get_one(&cdcacm->tsrb);
ep->buf[cdcacm->occupied++] = (uint8_t)c;
@ -293,6 +302,7 @@ static void _handle_in(usbus_cdcacm_device_t *cdcacm,
break;
}
}
irq_restore(old);
usbdev_ep_ready(ep, cdcacm->occupied);
}