Commits on May 31, 2023

1. net: Fix task block when devif_send fails. …

   When a task needs to send data, a callback is allocated and the
   transmission is happening in a worker task through devif_send.
   Synchronization between the two tasks (sender & worker) is
   achieved by a semaphore.
   
   If devif_send fails, this semaphore was never posted, leaving
   the sending task blocked indefinitely. This commit fixes this
   by checking the return code of netif_send, and posting this
   semaphore in case of failure.
   
   Polling then stops, and execution is resumed on the sending
   task.

   

   fjpanag committed May 31, 2023
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