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IB/hfi1: Handle wakeup of orphaned QPs for pio

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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: 7724105686 ("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>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Mike Marciniszyn 2019-06-14 12:33:00 -04:00 committed by Doug Ledford
parent f972775b1c
commit 099a884ba4
1 changed files with 16 additions and 0 deletions
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16
drivers/infiniband/hw/hfi1/pio.c
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@ -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);
}