net/ena: refactor ena_get_stats64 to be atomic context safe

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ndo_get_stat64() can be called from atomic context, but the current
implementation sends an admin command to retrieve the statistics from
the device. This admin command can sleep.

This patch re-factors the implementation of ena_get_stats64() to use
the {rx,tx}bytes/count from the driver's inner counters, and to obtain
the rx drop counter from the asynchronous keep alive (heart bit)
event.

Signed-off-by: Netanel Belgazal <netanel@annapurnalabs.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Netanel Belgazal 2017-02-09 15:21:32 +02:00 • committed by David S. Miller

parent 22b331c9e0

commit d81db24056

3 changed files with 42 additions and 15 deletions

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8

drivers/net/ethernet/amazon/ena/ena_admin_defs.h

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48

drivers/net/ethernet/amazon/ena/ena_netdev.c

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1

drivers/net/ethernet/amazon/ena/ena_netdev.h

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