Daniel Scheller writes: > From: Daniel Scheller <d.schel...@gmx.net> > > When calling gate_ctrl() with enable=0 if previously the mutex wasn't > locked (ie. on enable=1 failure and subdrivers not handling this properly, > or by otherwise badly behaving drivers), the i2c_lock could be unlocked
I think drivers and subdrivers should rather be fixed so that this cannot happen. But to do this we will first need to define exactly how a failure in gate_ctrl() is supposed to be handled, both inside gate_ctrl() and by calling drivers. > consecutively which isn't allowed. Prevent this by keeping track of the > lock state, and actually call mutex_unlock() only when certain the lock > is held. Why not use mutex_is_locked()? And there should be a debug message if it (tried double unlocking) happens. Regards, Ralph
