tree c92c000d3119f222b8fcee9fe732bd796804f193
parent c232d8a8bb1416f7ec21bb1aabc7c4ec8a5a899e
author Ido Shamay <idos@mellanox.com> 1430404366 +0300
committer David S. Miller <davem@davemloft.net> 1430426870 -0400

net/mlx4_en: Schedule napi when RX buffers allocation fails

When system is out of memory, refilling of RX buffers fails while
the driver continue to pass the received packets to the kernel stack.
At some point, when all RX buffers deplete, driver may fall into a
sleep, and not recover when memory for new RX buffers is once again
availible. This is because hardware does not have valid descriptors,
so no interrupt will be generated for the driver to return to work
in napi context. Fix it by schedule the napi poll function from
stats_task delayed workqueue, as long as the allocations fail.

Signed-off-by: Ido Shamay <idos@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>