From: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxx>
[ Upstream commit 099a884ba4c00145cef283d36e050726311c2e95 ]
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@xxxxxxxxx>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@xxxxxxxxx>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxx>
Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/infiniband/hw/hfi1/pio.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/infiniband/hw/hfi1/pio.c b/drivers/infiniband/hw/hfi1/pio.c
index a1de566fe95e..1ee47838d4de 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);
}
--
2.20.1
