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authorGavin Shan <gwshan@linux.vnet.ibm.com>2016-10-04 03:25:52 +0300
committerDavid S. Miller <davem@davemloft.net>2016-10-04 09:11:51 +0300
commit83afdc6aad9d767cae271df1ca15641b9cbe3bfe (patch)
treeadd1f527f3a3957e4f2a0c4ca5d7673ef5d8898a /net/ncsi/ncsi-rsp.c
parenta0509cbeef5dafbab42c42622e012bcc94c3eb9e (diff)
downloadlinux-83afdc6aad9d767cae271df1ca15641b9cbe3bfe.tar.xz
net/ncsi: Rework the channel monitoring
The original NCSI channel monitoring was implemented based on a backoff algorithm: the GLS response should be received in the specified interval. Otherwise, the channel is regarded as dead and failover should be taken if current channel is an active one. There are several problems in the implementation: (A) On BCM5718, we found when the IID (Instance ID) in the GLS command packet changes from 255 to 1, the response corresponding to IID#1 never comes in. It means we cannot make the unfair judgement that the channel is dead when one response is missed. (B) The code's readability should be improved. (C) We should do failover when current channel is active one and the channel monitoring should be marked as disabled before doing failover. This reworks the channel monitoring to address all above issues. The fields for channel monitoring is put into separate struct and the state of channel monitoring is predefined. The channel is regarded alive if the network controller responses to one of two GLS commands or both of them in 5 seconds. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ncsi/ncsi-rsp.c')
-rw-r--r--net/ncsi/ncsi-rsp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ncsi/ncsi-rsp.c b/net/ncsi/ncsi-rsp.c
index 86cdaebd8d9e..087db775b3dc 100644
--- a/net/ncsi/ncsi-rsp.c
+++ b/net/ncsi/ncsi-rsp.c
@@ -322,7 +322,7 @@ static int ncsi_rsp_handler_gls(struct ncsi_request *nr)
/* Reset the channel monitor if it has been enabled */
spin_lock_irqsave(&nc->lock, flags);
- nc->timeout = 0;
+ nc->monitor.state = NCSI_CHANNEL_MONITOR_START;
spin_unlock_irqrestore(&nc->lock, flags);
return 0;