From: Michael S. Tsirkin Date: Sun, 27 May 2007 15:06:42 +0000 (+0300) Subject: IB/mthca: Fix handling of send CQE with error for QPs connected to SRQ X-Git-Tag: v2.6.22-rc4~94^2~3 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8b7e15772a286d0ef8e4f8eca422ce5368b6fa97;p=linux-2.6 IB/mthca: Fix handling of send CQE with error for QPs connected to SRQ mthca_free_err_wqe() currently treats both send and receive CQEs identically if a QP is using an SRQ. But for Tavor hardware, send CQEs with error can be chained together even if the RQ is part of SRQ, so we may miss some CQEs. Fix by following the WQE chain for all send CQEs even for non-SRQ QPs. This fixes crashes in IPoIB CM: Signed-off-by: Michael S. Tsirkin Signed-off-by: Roland Dreier --- diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c index 027664979f..eef415b12b 100644 --- a/drivers/infiniband/hw/mthca/mthca_qp.c +++ b/drivers/infiniband/hw/mthca/mthca_qp.c @@ -2284,10 +2284,10 @@ void mthca_free_err_wqe(struct mthca_dev *dev, struct mthca_qp *qp, int is_send, struct mthca_next_seg *next; /* - * For SRQs, all WQEs generate a CQE, so we're always at the - * end of the doorbell chain. + * For SRQs, all receive WQEs generate a CQE, so we're always + * at the end of the doorbell chain. */ - if (qp->ibqp.srq) { + if (qp->ibqp.srq && !is_send) { *new_wqe = 0; return; }