Merge branch 'ipa-RX-replenish'

Alex Elder says:

====================
net: ipa: improve RX buffer replenishing

This series revises the algorithm used for replenishing receive
buffers on RX endpoints.  Currently there are two atomic variables
that track how many receive buffers can be sent to the hardware.
The new algorithm obviates the need for those, by just assuming we
always want to provide the hardware with buffers until it can hold
no more.

The first patch eliminates an atomic variable that's not required.
The next moves some code into the main replenish function's caller,
making one of the called function's arguments unnecessary.   The
next six refactor things a bit more, adding a new helper function
that allows us to eliminate an additional atomic variable.  And the
final two implement two more minor improvements.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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