[PATCH] staging: pi433: add mutex fixing race condition when accessing tx_cfg

[Hugo Lefeuvre]

> We read the data from the user here and then we write it to the fifo
> in pi433_write().  We should be using the device->tx_fifo_lock so that
> we don't copy over the data at the same time we're writing it to the
> fifo.

Oh right, that makes the bug even worse.

In this case we don't even need to introduce a new lock, using
device->tx_fifo_lock should be fine. I'll update the patch.

-- 
             Hugo Lefeuvre (hle)    |    www.owl.eu.com
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