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fm10k: remove ndo_poll_controller

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As diagnosed by Song Liu, ndo_poll_controller() can
be very dangerous on loaded hosts, since the cpu
calling ndo_poll_controller() might steal all NAPI
contexts (for all RX/TX queues of the NIC). This capture
lasts for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

fm10k uses NAPI for TX completions, so we better let core
networking stack call the napi->poll() to avoid the capture.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2018-09-21 15:27:42 -07:00
committed by David S. Miller
parent 6f5d941eba
commit dda9d57e2d
3 changed files with 0 additions and 28 deletions
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3
drivers/net/ethernet/intel/fm10k/fm10k.h
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@@ -504,9 +504,6 @@ void fm10k_update_stats(struct fm10k_intfc *interface);
void fm10k_service_event_schedule(struct fm10k_intfc *interface);
void fm10k_macvlan_schedule(struct fm10k_intfc *interface);
void fm10k_update_rx_drop_en(struct fm10k_intfc *interface);
#ifdef CONFIG_NET_POLL_CONTROLLER
void fm10k_netpoll(struct net_device *netdev);
#endif
/* Netdev */
struct net_device *fm10k_alloc_netdev(const struct fm10k_info *info);