]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
nfp: avoid soft lockups under control message storm
authorJakub Kicinski <jakub.kicinski@netronome.com>
Tue, 2 Oct 2018 17:10:14 +0000 (10:10 -0700)
committerDavid S. Miller <davem@davemloft.net>
Tue, 2 Oct 2018 18:47:58 +0000 (11:47 -0700)
commitff58e2df62ce29d0552278c290ae494b30fe0c6f
tree49c6b849d1cab1bd98f5e03b95707b9b210f53ff
parentfe3a83af6a50199bf250fa331e94216912f79395
nfp: avoid soft lockups under control message storm

When FW floods the driver with control messages try to exit the cmsg
processing loop every now and then to avoid soft lockups.  Cmsg
processing is generally very lightweight so 512 seems like a reasonable
budget, which should not be exceeded under normal conditions.

Fixes: 77ece8d5f196 ("nfp: add control vNIC datapath")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Tested-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/ethernet/netronome/nfp/nfp_net_common.c