[ECOS] cyg_drv_mutex_lock combine with while loop?

[Philipp Meier]

I see in some driver code the following statements:
     while(!cyg_drv_mutex_lock(&any_lock));

And I wonder if this might be the source of a deadlock or even the 
source of a stack overflow.

Is it a good/secure idea to stay in a while loop when 
cyg_drv_mutex_lock() returns false? Or should this be handled as an 
exceptional state?

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