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

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;