diff options
| author | Shannon Nelson <snelson@pensando.io> | 2021-03-18 17:48:10 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-03-18 19:16:10 -0700 |
| commit | e768929de1e4521ff3b3d5e8a74d62e7eeb50cf9 (patch) | |
| tree | fde3c05691ab515c27eddb283cbcf15d344ad524 /drivers/net/ethernet/pensando/ionic/ionic_lif.c | |
| parent | 9e8eaf8427b6e07e8359a565f1f43c499fce6fa7 (diff) | |
ionic: protect adminq from early destroy
Don't destroy the adminq while there is an outstanding request.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/pensando/ionic/ionic_lif.c')
| -rw-r--r-- | drivers/net/ethernet/pensando/ionic/ionic_lif.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c index 9b3afedbc083..889d234e2ffa 100644 --- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c +++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c @@ -393,6 +393,8 @@ static void ionic_qcq_free(struct ionic_lif *lif, struct ionic_qcq *qcq) static void ionic_qcqs_free(struct ionic_lif *lif) { struct device *dev = lif->ionic->dev; + struct ionic_qcq *adminqcq; + unsigned long irqflags; if (lif->notifyqcq) { ionic_qcq_free(lif, lif->notifyqcq); @@ -401,9 +403,14 @@ static void ionic_qcqs_free(struct ionic_lif *lif) } if (lif->adminqcq) { - ionic_qcq_free(lif, lif->adminqcq); - devm_kfree(dev, lif->adminqcq); + spin_lock_irqsave(&lif->adminq_lock, irqflags); + adminqcq = READ_ONCE(lif->adminqcq); lif->adminqcq = NULL; + spin_unlock_irqrestore(&lif->adminq_lock, irqflags); + if (adminqcq) { + ionic_qcq_free(lif, adminqcq); + devm_kfree(dev, adminqcq); + } } if (lif->rxqcqs) { @@ -886,6 +893,7 @@ static int ionic_adminq_napi(struct napi_struct *napi, int budget) struct ionic_intr_info *intr = napi_to_cq(napi)->bound_intr; struct ionic_lif *lif = napi_to_cq(napi)->lif; struct ionic_dev *idev = &lif->ionic->idev; + unsigned long irqflags; unsigned int flags = 0; int n_work = 0; int a_work = 0; @@ -895,9 +903,11 @@ static int ionic_adminq_napi(struct napi_struct *napi, int budget) n_work = ionic_cq_service(&lif->notifyqcq->cq, budget, ionic_notifyq_service, NULL, NULL); + spin_lock_irqsave(&lif->adminq_lock, irqflags); if (lif->adminqcq && lif->adminqcq->flags & IONIC_QCQ_F_INITED) a_work = ionic_cq_service(&lif->adminqcq->cq, budget, ionic_adminq_service, NULL, NULL); + spin_unlock_irqrestore(&lif->adminq_lock, irqflags); work_done = max(n_work, a_work); if (work_done < budget && napi_complete_done(napi, work_done)) { |