redonkable/alistair23-linux
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IB/ipath: Don't put QP in timeout queue if waiting to send

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This fixes a problem which causes too many RC timeouts and
retransmits.

Signed-off-by: Ralph Campbell <ralph.campbell@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Ralph Campbell 2007-04-27 11:08:40 -07:00 committed by Roland Dreier
parent 35ff032e65
commit c3af664adb
2 changed files with 2 additions and 7 deletions
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7
drivers/infiniband/hw/ipath/ipath_rc.c
View file

@ -228,18 +228,13 @@ int ipath_make_rc_req(struct ipath_qp *qp,
goto done;
if (!(ib_ipath_state_ops[qp->state] & IPATH_PROCESS_SEND_OK) ||
qp->s_rnr_timeout)
qp->s_rnr_timeout || qp->s_wait_credit)
goto bail;
/* Limit the number of packets sent without an ACK. */
if (ipath_cmp24(qp->s_psn, qp->s_last_psn + IPATH_PSN_CREDIT) > 0) {
qp->s_wait_credit = 1;
dev->n_rc_stalls++;
spin_lock(&dev->pending_lock);
if (list_empty(&qp->timerwait))
list_add_tail(&qp->timerwait,
&dev->pending[dev->pending_index]);
spin_unlock(&dev->pending_lock);
goto bail;
}

2
drivers/infiniband/hw/ipath/ipath_verbs.h
View file

@ -422,7 +422,7 @@ struct ipath_qp {
#define IPATH_S_RDMAR_PENDING 0x04
#define IPATH_S_ACK_PENDING 0x08
#define IPATH_PSN_CREDIT 2048
#define IPATH_PSN_CREDIT 512
/*
* Since struct ipath_swqe is not a fixed size, we can't simply index into