diff options
Diffstat (limited to 'src/device')
| -rw-r--r-- | src/device/usbd.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/device/usbd.c b/src/device/usbd.c index 8fc0092eb..dfe30578e 100644 --- a/src/device/usbd.c +++ b/src/device/usbd.c @@ -1100,11 +1100,14 @@ bool usbd_edpt_claim(uint8_t rhport, uint8_t ep_addr) uint8_t const dir = tu_edpt_dir(ep_addr); #if CFG_TUSB_OS != OPT_OS_NONE + // pre-check to help reducing mutex lock + TU_VERIFY((_usbd_dev.ep_status[epnum][dir].busy == 0) && (_usbd_dev.ep_status[epnum][dir].claimed == 0)); + osal_mutex_lock(_usbd_mutex, OSAL_TIMEOUT_WAIT_FOREVER); #endif // can only claim the endpoint if it is not busy and not claimed yet. - bool ret = (_usbd_dev.ep_status[epnum][dir].busy == 0) && (_usbd_dev.ep_status[epnum][dir].claimed == 0); + bool const ret = (_usbd_dev.ep_status[epnum][dir].busy == 0) && (_usbd_dev.ep_status[epnum][dir].claimed == 0); if (ret) { _usbd_dev.ep_status[epnum][dir].claimed = 1; |