staging: most: i2c: remove redundant list_mutex
The elements of the dev->rx.list are consumed in the pending_rx_work and populated in the function enqueue() that cancels the pending_rx_work. The function enqueue() and poison_channel() do not race anyway. Signed-off-by: Andrey Shvetsov <andrey.shvetsov@k2l.de> Signed-off-by: Christian Gromm <christian.gromm@microchip.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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