lkml.org 
[lkml]   [2008]   [Nov]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] IB/ehca: Fix suppression of port activation events
Date
A previous fix introduced a regression where port activation events were
dropped unconditionally if port autodetection was not enabled. Fixed.

Signed-off-by: Joachim Fenkes <fenkes@de.ibm.com>
---
Roland -- this patch is made against your for-linus branch. Please review
and apply if you think it's okay. Hope it's not too late for the next kernel.

Joachim

drivers/infiniband/hw/ehca/ehca_irq.c | 45 +++++++++++++++++++-------------
1 files changed, 27 insertions(+), 18 deletions(-)
diff --git a/drivers/infiniband/hw/ehca/ehca_irq.c b/drivers/infiniband/hw/ehca/ehca_irq.c
index 9e43459..757035e 100644
--- a/drivers/infiniband/hw/ehca/ehca_irq.c
+++ b/drivers/infiniband/hw/ehca/ehca_irq.c
@@ -359,34 +359,43 @@ static void notify_port_conf_change(struct ehca_shca *shca, int port_num)
*old_attr = new_attr;
}

+/* replay modify_qp for sqps -- return 0 if all is well, 1 if AQP1 destroyed */
+static int replay_modify_qp(struct ehca_sport *sport)
+{
+ int aqp1_destroyed;
+ unsigned long flags;
+
+ spin_lock_irqsave(&sport->mod_sqp_lock, flags);
+
+ aqp1_destroyed = !sport->ibqp_sqp[IB_QPT_GSI];
+
+ if (sport->ibqp_sqp[IB_QPT_SMI])
+ ehca_recover_sqp(sport->ibqp_sqp[IB_QPT_SMI]);
+ if (!aqp1_destroyed)
+ ehca_recover_sqp(sport->ibqp_sqp[IB_QPT_GSI]);
+
+ spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
+
+ return aqp1_destroyed;
+}
+
static void parse_ec(struct ehca_shca *shca, u64 eqe)
{
u8 ec = EHCA_BMASK_GET(NEQE_EVENT_CODE, eqe);
u8 port = EHCA_BMASK_GET(NEQE_PORT_NUMBER, eqe);
u8 spec_event;
struct ehca_sport *sport = &shca->sport[port - 1];
- unsigned long flags;

switch (ec) {
case 0x30: /* port availability change */
if (EHCA_BMASK_GET(NEQE_PORT_AVAILABILITY, eqe)) {
- /* only for autodetect mode important */
- if (ehca_nr_ports >= 0)
- break;
-
- int suppress_event;
- /* replay modify_qp for sqps */
- spin_lock_irqsave(&sport->mod_sqp_lock, flags);
- suppress_event = !sport->ibqp_sqp[IB_QPT_GSI];
- if (sport->ibqp_sqp[IB_QPT_SMI])
- ehca_recover_sqp(sport->ibqp_sqp[IB_QPT_SMI]);
- if (!suppress_event)
- ehca_recover_sqp(sport->ibqp_sqp[IB_QPT_GSI]);
- spin_unlock_irqrestore(&sport->mod_sqp_lock, flags);
-
- /* AQP1 was destroyed, ignore this event */
- if (suppress_event)
- break;
+ /* only replay modify_qp calls in autodetect mode;
+ * if AQP1 was destroyed, the port is already down
+ * again and we can drop the event.
+ */
+ if (ehca_nr_ports < 0)
+ if (replay_modify_qp(sport))
+ break;

sport->port_state = IB_PORT_ACTIVE;
dispatch_port_event(shca, port, IB_EVENT_PORT_ACTIVE,
--
1.5.5





\
 
 \ /
  Last update: 2008-11-07 17:45    [from the cache]
©2003-2011 Jasper Spaans