From 29bb33dd87dbe8db07c2b19df3fb453d999c96de Mon Sep 17 00:00:00 2001 From: Hal Rosenstock Date: Wed, 27 Jul 2005 11:45:32 -0700 Subject: [PATCH] [PATCH] IB: Optimize canceling a MAD Optimize canceling a MAD. - Eliminate searching timeout list in cancel case. - Remove duplicate calls to queue work item. - Eliminate resending a MAD before MAD is completed. Signed-off-by: Sean Hefty Signed-off-by: Hal Rosenstock Cc: Roland Dreier Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/infiniband/core/mad.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/drivers/infiniband/core/mad.c b/drivers/infiniband/core/mad.c index 7af72d4ae6c8..1d8f26f54ec9 100644 --- a/drivers/infiniband/core/mad.c +++ b/drivers/infiniband/core/mad.c @@ -1754,14 +1754,18 @@ static void wait_for_response(struct ib_mad_send_wr_private *mad_send_wr) delay = mad_send_wr->timeout; mad_send_wr->timeout += jiffies; - list_for_each_prev(list_item, &mad_agent_priv->wait_list) { - temp_mad_send_wr = list_entry(list_item, - struct ib_mad_send_wr_private, - agent_list); - if (time_after(mad_send_wr->timeout, - temp_mad_send_wr->timeout)) - break; + if (delay) { + list_for_each_prev(list_item, &mad_agent_priv->wait_list) { + temp_mad_send_wr = list_entry(list_item, + struct ib_mad_send_wr_private, + agent_list); + if (time_after(mad_send_wr->timeout, + temp_mad_send_wr->timeout)) + break; + } } + else + list_item = &mad_agent_priv->wait_list; list_add(&mad_send_wr->agent_list, list_item); /* Reschedule a work item if we have a shorter timeout */ @@ -2197,7 +2201,8 @@ static void timeout_sends(void *data) } list_del(&mad_send_wr->agent_list); - if (!retry_send(mad_send_wr)) + if (mad_send_wr->status == IB_WC_SUCCESS && + !retry_send(mad_send_wr)) continue; spin_unlock_irqrestore(&mad_agent_priv->lock, flags); -- 2.30.2