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RDMA/irdma: Flush iWARP QP if modified to ERR from RTR state

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When connection establishment fails in iWARP mode, an app can drain the
QPs and hang because flush isn't issued when the QP is modified from RTR
state to error. Issue a flush in this case using function
irdma_cm_disconn().

Update irdma_cm_disconn() to do flush when cm_id is NULL, which is the
case when the QP is in RTR state and there is an error in the connection
establishment.

Fixes: b48c24c2d7 ("RDMA/irdma: Implement device supported verb APIs")
Link: https://lore.kernel.org/r/20220425181703.1634-2-shiraz.saleem@intel.com
Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Tatyana Nikolova 2022-04-25 13:17:01 -05:00 committed by Jason Gunthorpe
parent 570a4bf744
commit 7b8943b821
2 changed files with 7 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/infiniband/hw/irdma/cm.c
View File

@ -3462,12 +3462,6 @@ static void irdma_cm_disconn_true(struct irdma_qp *iwqp)
}
cm_id = iwqp->cm_id;
/* make sure we havent already closed this connection */
if (!cm_id) {
spin_unlock_irqrestore(&iwqp->lock, flags);
return;
}
original_hw_tcp_state = iwqp->hw_tcp_state;
original_ibqp_state = iwqp->ibqp_state;
last_ae = iwqp->last_aeq;
@ -3489,11 +3483,11 @@ static void irdma_cm_disconn_true(struct irdma_qp *iwqp)
disconn_status = -ECONNRESET;
}
if ((original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED ||
original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT ||
last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE ||
last_ae == IRDMA_AE_BAD_CLOSE ||
last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset)) {
if (original_hw_tcp_state == IRDMA_TCP_STATE_CLOSED ||
original_hw_tcp_state == IRDMA_TCP_STATE_TIME_WAIT ||
last_ae == IRDMA_AE_RDMAP_ROE_BAD_LLP_CLOSE ||
last_ae == IRDMA_AE_BAD_CLOSE ||
last_ae == IRDMA_AE_LLP_CONNECTION_RESET || iwdev->rf->reset || !cm_id) {
issue_close = 1;
iwqp->cm_id = NULL;
qp->term_flags = 0;

4
drivers/infiniband/hw/irdma/verbs.c
View File

@ -1618,13 +1618,13 @@ int irdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask,
if (issue_modify_qp && iwqp->ibqp_state > IB_QPS_RTS) {
if (dont_wait) {
if (iwqp->cm_id && iwqp->hw_tcp_state) {
if (iwqp->hw_tcp_state) {
spin_lock_irqsave(&iwqp->lock, flags);
iwqp->hw_tcp_state = IRDMA_TCP_STATE_CLOSED;
iwqp->last_aeq = IRDMA_AE_RESET_SENT;
spin_unlock_irqrestore(&iwqp->lock, flags);
irdma_cm_disconn(iwqp);
}
irdma_cm_disconn(iwqp);
} else {
int close_timer_started;