Donny9 opened a new pull request, #15842:
URL: https://github.com/apache/nuttx/pull/15842
## Summary
drivers: Avoid causing a busy loop in the program due to context switching
induced by sem_post.
examples:
There are two threads involved: thread A with a priority of 100 and thread B
with a priority of 101. Here's how they interact:
When thread A releases a semaphore, thread B is scheduled to execute some
code and may reacquire the semaphore. If no other tasks are ready, thread A
will be scheduled to run.
This continuous process can lead to a busy loop.
```
errcode:
while (nxsem_get_value(&priv->wait, &semcount) >= 0 && semcount <= 0)
{
nxsem_post(&priv->wait);
}
```
## Impact
bug fix
## Testing
localtest
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