qlcnic: 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
can last for unlimited amount of time, since one
cpu is generally not able to drain all the queues under load.

qlcnic 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: Harish Patil <harish.patil@cavium.com>
Cc: Manish Chopra <manish.chopra@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Eric Dumazet 2018-09-27 09:31:56 -07:00 • committed by David S. Miller

parent 260dd2c3e2

commit 81b059b218

1 changed files with 0 additions and 45 deletions

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drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c

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