netxen: separate register and memory access lock
Since register and onboard memory access has separate window registers, they need not be kept under same lock. Also, memory is always accessed from process context (mostly for firmware init and diagnostic tools). Signed-off-by: NDhananjay Phadke <dhananjay@netxen.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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