Messages in this thread Patch in this message | | | Subject | [PATCH 15/29v2] Fix a couple of MAD code paths | From | Hal Rosenstock <> | Date | 11 Jul 2005 16:23:18 -0400 |
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Fixed locking to handle error posting MAD send work requests. Fixed handling canceling a MAD with an active work request.
Signed-off-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Hal Rosenstock <halr@voltaire.com>
This patch depends on patch 14/29.
-- mad.c | 28 ++++++++++++++-- 1 files changed, 14 insertions(+), 14 deletions(-) diff -uprN linux-2.6.13-rc2-mm1-14/drivers/infiniband/core/mad.c linux-2.6.13-rc2-mm1-15/drivers/infiniband/core/mad.c -- linux-2.6.13-rc2-mm1-14/drivers/infiniband/core/mad.c 2005-07-11 13:38:42.000000000 -0400 +++ linux-2.6.13-rc2-mm1-15/drivers/infiniband/core/mad.c 2005-07-11 13:38:54.000000000 -0400 @@ -841,6 +841,7 @@ static int ib_send_mad(struct ib_mad_sen { struct ib_mad_qp_info *qp_info; struct ib_send_wr *bad_send_wr; + struct list_head *list; unsigned long flags; int ret; @@ -850,22 +851,20 @@ static int ib_send_mad(struct ib_mad_sen mad_send_wr->mad_list.mad_queue = &qp_info->send_queue; spin_lock_irqsave(&qp_info->send_queue.lock, flags); - if (qp_info->send_queue.count++ < qp_info->send_queue.max_active) { - list_add_tail(&mad_send_wr->mad_list.list, - &qp_info->send_queue.list); - spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); + if (qp_info->send_queue.count < qp_info->send_queue.max_active) { ret = ib_post_send(mad_send_wr->mad_agent_priv->agent.qp, &mad_send_wr->send_wr, &bad_send_wr); - if (ret) { - printk(KERN_ERR PFX "ib_post_send failed: %d\n", ret); - dequeue_mad(&mad_send_wr->mad_list); - } + list = &qp_info->send_queue.list; } else { - list_add_tail(&mad_send_wr->mad_list.list, - &qp_info->overflow_list); - spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); ret = 0; + list = &qp_info->overflow_list; } + + if (!ret) { + qp_info->send_queue.count++; + list_add_tail(&mad_send_wr->mad_list.list, list); + } + spin_unlock_irqrestore(&qp_info->send_queue.lock, flags); return ret; } @@ -2023,8 +2022,7 @@ static void cancel_mads(struct ib_mad_ag } static struct ib_mad_send_wr_private* -find_send_by_wr_id(struct ib_mad_agent_private *mad_agent_priv, - u64 wr_id) +find_send_by_wr_id(struct ib_mad_agent_private *mad_agent_priv, u64 wr_id) { struct ib_mad_send_wr_private *mad_send_wr; @@ -2047,6 +2045,7 @@ int ib_modify_mad(struct ib_mad_agent *m struct ib_mad_agent_private *mad_agent_priv; struct ib_mad_send_wr_private *mad_send_wr; unsigned long flags; + int active; mad_agent_priv = container_of(mad_agent, struct ib_mad_agent_private, agent); @@ -2057,13 +2056,14 @@ int ib_modify_mad(struct ib_mad_agent *m return -EINVAL; } + active = (!mad_send_wr->timeout || mad_send_wr->refcount > 1); if (!timeout_ms) { mad_send_wr->status = IB_WC_WR_FLUSH_ERR; mad_send_wr->refcount -= (mad_send_wr->timeout > 0); } mad_send_wr->send_wr.wr.ud.timeout_ms = timeout_ms; - if (!mad_send_wr->timeout || mad_send_wr->refcount > 1) + if (active) mad_send_wr->timeout = msecs_to_jiffies(timeout_ms); else ib_reset_mad_timeout(mad_send_wr, timeout_ms);
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