From 46e4265be3c4380d9de5fa91ce504af94e8bfcde Mon Sep 17 00:00:00 2001 From: Shannon Nelson Date: Thu, 1 Oct 2020 09:22:42 -0700 Subject: [PATCH] ionic: check qcq ptr in ionic_qcq_disable There are a couple of error recovery paths that can come through ionic_qcq_disable() without having set up the qcq, so we need to make sure we have a valid qcq pointer before using it. Signed-off-by: Shannon Nelson Signed-off-by: David S. Miller --- .../net/ethernet/pensando/ionic/ionic_lif.c | 31 ++++++++++++------- 1 file changed, 20 insertions(+), 11 deletions(-) diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c index 5906145e45859..efffdfe184068 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c @@ -266,29 +266,26 @@ static int ionic_qcq_enable(struct ionic_qcq *qcq) static int ionic_qcq_disable(struct ionic_qcq *qcq) { - struct ionic_queue *q = &qcq->q; - struct ionic_lif *lif = q->lif; - struct ionic_dev *idev; - struct device *dev; + struct ionic_queue *q; + struct ionic_lif *lif; struct ionic_admin_ctx ctx = { .work = COMPLETION_INITIALIZER_ONSTACK(ctx.work), .cmd.q_control = { .opcode = IONIC_CMD_Q_CONTROL, - .lif_index = cpu_to_le16(lif->index), - .type = q->type, - .index = cpu_to_le32(q->index), .oper = IONIC_Q_DISABLE, }, }; - idev = &lif->ionic->idev; - dev = lif->ionic->dev; + if (!qcq) + return -ENXIO; - dev_dbg(dev, "q_disable.index %d q_disable.qtype %d\n", - ctx.cmd.q_control.index, ctx.cmd.q_control.type); + q = &qcq->q; + lif = q->lif; if (qcq->flags & IONIC_QCQ_F_INTR) { + struct ionic_dev *idev = &lif->ionic->idev; + cancel_work_sync(&qcq->dim.work); ionic_intr_mask(idev->intr_ctrl, qcq->intr.index, IONIC_INTR_MASK_SET); @@ -297,6 +294,12 @@ static int ionic_qcq_disable(struct ionic_qcq *qcq) napi_disable(&qcq->napi); } + ctx.cmd.q_control.lif_index = cpu_to_le16(lif->index); + ctx.cmd.q_control.type = q->type; + ctx.cmd.q_control.index = cpu_to_le32(q->index); + dev_dbg(lif->ionic->dev, "q_disable.index %d q_disable.qtype %d\n", + ctx.cmd.q_control.index, ctx.cmd.q_control.type); + return ionic_adminq_post_wait(lif, &ctx); } @@ -1794,6 +1797,12 @@ static int ionic_txrx_enable(struct ionic_lif *lif) int i, err; for (i = 0; i < lif->nxqs; i++) { + if (!(lif->rxqcqs[i] && lif->txqcqs[i])) { + dev_err(lif->ionic->dev, "%s: bad qcq %d\n", __func__, i); + err = -ENXIO; + goto err_out; + } + ionic_rx_fill(&lif->rxqcqs[i]->q); err = ionic_qcq_enable(lif->rxqcqs[i]); if (err) -- 2.39.5