diff mbox series

[for-rc,6/7] IB/hfi1: Handle wakeup of orphaned QPs for pio

Message ID 20190614163300.44927.3466.stgit@awfm-01.aw.intel.com (mailing list archive)
State Mainlined
Commit 099a884ba4c00145cef283d36e050726311c2e95
Headers show
Series IB/hfi1: Fix a stuck qp problem | expand

Commit Message

Dennis Dalessandro June 14, 2019, 4:33 p.m. UTC 
From: Mike Marciniszyn <mike.marciniszyn@intel.com>

Once a send context is taken down due to a link failure, any QPs waiting
for pio credits will stay on the waitlist indefinitely.

Fix by wakeing up all QPs linked to piowait list.

Fixes: 7724105686e7 ("IB/hfi1: add driver files")
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
---
 drivers/infiniband/hw/hfi1/pio.c |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)
diff mbox series

Patch

diff --git a/drivers/infiniband/hw/hfi1/pio.c b/drivers/infiniband/hw/hfi1/pio.c
index 9190086..2f32d53 100644
--- a/drivers/infiniband/hw/hfi1/pio.c
+++ b/drivers/infiniband/hw/hfi1/pio.c
@@ -952,6 +952,22 @@  void sc_disable(struct send_context *sc)
 		}
 	}
 	spin_unlock(&sc->release_lock);
+
+	write_seqlock(&sc->waitlock);
+	while (!list_empty(&sc->piowait)) {
+		struct iowait *wait;
+		struct rvt_qp *qp;
+		struct hfi1_qp_priv *priv;
+
+		wait = list_first_entry(&sc->piowait, struct iowait, list);
+		qp = iowait_to_qp(wait);
+		priv = qp->priv;
+		list_del_init(&priv->s_iowait.list);
+		priv->s_iowait.lock = NULL;
+		hfi1_qp_wakeup(qp, RVT_S_WAIT_PIO | HFI1_S_WAIT_PIO_DRAIN);
+	}
+	write_sequnlock(&sc->waitlock);
+
 	spin_unlock_irq(&sc->alloc_lock);
 }