From patchwork Tue Dec 22 02:21:24 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Scott Feldman X-Patchwork-Id: 41577 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id A83E4B6EF6 for ; Tue, 22 Dec 2009 13:21:34 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752546AbZLVCV1 (ORCPT ); Mon, 21 Dec 2009 21:21:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751592AbZLVCVZ (ORCPT ); Mon, 21 Dec 2009 21:21:25 -0500 Received: from sj-iport-5.cisco.com ([171.68.10.87]:14561 "EHLO sj-iport-5.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752260AbZLVCVZ (ORCPT ); Mon, 21 Dec 2009 21:21:25 -0500 Authentication-Results: sj-iport-5.cisco.com; dkim=neutral (message not signed) header.i=none X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApsEANu7L0urRN+K/2dsb2JhbACECrwShwCPQ4Evgi1SBIFk X-IronPort-AV: E=Sophos;i="4.47,434,1257120000"; d="scan'208";a="123493351" Received: from sj-core-4.cisco.com ([171.68.223.138]) by sj-iport-5.cisco.com with ESMTP; 22 Dec 2009 02:21:24 +0000 Received: from savbu-pc100.cisco.com (savbu-pc100.cisco.com [10.193.164.29]) by sj-core-4.cisco.com (8.13.8/8.14.3) with ESMTP id nBM2LOTQ001651; Tue, 22 Dec 2009 02:21:24 GMT From: Scott Feldman Subject: [net-next PATCH 1/6] enic: Bug fix: use safe queue shutdown in dev->stop To: davem@davemloft.net Cc: netdev@vger.kernel.org Date: Mon, 21 Dec 2009 18:21:24 -0800 Message-ID: <20091222022124.30220.98249.stgit@savbu-pc100.cisco.com> In-Reply-To: <20091222021857.30220.51795.stgit@savbu-pc100.cisco.com> References: <20091222021857.30220.51795.stgit@savbu-pc100.cisco.com> User-Agent: StGIT/0.12.1 MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Scott Feldman Fix dev->stop shutdown bug where driver was stopping xmit queue and then disabling intrs. Fix is to disable intrs first and then stop the xmit queue, otherwise an interrupt could cause the queue to be rewoken. Also, no need to explicitly do queue servicing because queues are cleaned and reset back to initial state at end of dev->stop. Servicing queues also had the side-effect of also rewakening the xmit queue, which is not what we want. Signed-off-by: Vasanthy Kolluri Signed-off-by: Scott Feldman --- drivers/net/enic/enic.h | 2 + drivers/net/enic/enic_main.c | 62 +++++++++++++++++------------------------- drivers/net/enic/vnic_intr.h | 1 + 3 files changed, 27 insertions(+), 38 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/drivers/net/enic/enic.h b/drivers/net/enic/enic.h index e1c2076..8dd0105 100644 --- a/drivers/net/enic/enic.h +++ b/drivers/net/enic/enic.h @@ -34,7 +34,7 @@ #define DRV_NAME "enic" #define DRV_DESCRIPTION "Cisco 10G Ethernet Driver" -#define DRV_VERSION "1.1.0.100" +#define DRV_VERSION "1.1.0.241a" #define DRV_COPYRIGHT "Copyright 2008-2009 Cisco Systems, Inc" #define PFX DRV_NAME ": " diff --git a/drivers/net/enic/enic_main.c b/drivers/net/enic/enic_main.c index f875751..b4a11be 100644 --- a/drivers/net/enic/enic_main.c +++ b/drivers/net/enic/enic_main.c @@ -1084,34 +1084,6 @@ static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc, return 0; } -static void enic_rq_drop_buf(struct vnic_rq *rq, - struct cq_desc *cq_desc, struct vnic_rq_buf *buf, - int skipped, void *opaque) -{ - struct enic *enic = vnic_dev_priv(rq->vdev); - struct sk_buff *skb = buf->os_buf; - - if (skipped) - return; - - pci_unmap_single(enic->pdev, buf->dma_addr, - buf->len, PCI_DMA_FROMDEVICE); - - dev_kfree_skb_any(skb); -} - -static int enic_rq_service_drop(struct vnic_dev *vdev, struct cq_desc *cq_desc, - u8 type, u16 q_number, u16 completed_index, void *opaque) -{ - struct enic *enic = vnic_dev_priv(vdev); - - vnic_rq_service(&enic->rq[q_number], cq_desc, - completed_index, VNIC_RQ_RETURN_DESC, - enic_rq_drop_buf, opaque); - - return 0; -} - static int enic_poll(struct napi_struct *napi, int budget) { struct enic *enic = container_of(napi, struct enic, napi); @@ -1304,6 +1276,24 @@ static int enic_request_intr(struct enic *enic) return err; } +static void enic_synchronize_irqs(struct enic *enic) +{ + unsigned int i; + + switch (vnic_dev_get_intr_mode(enic->vdev)) { + case VNIC_DEV_INTR_MODE_INTX: + case VNIC_DEV_INTR_MODE_MSI: + synchronize_irq(enic->pdev->irq); + break; + case VNIC_DEV_INTR_MODE_MSIX: + for (i = 0; i < enic->intr_count; i++) + synchronize_irq(enic->msix_entry[i].vector); + break; + default: + break; + } +} + static int enic_notify_set(struct enic *enic) { int err; @@ -1409,16 +1399,19 @@ static int enic_stop(struct net_device *netdev) unsigned int i; int err; + for (i = 0; i < enic->intr_count; i++) + vnic_intr_mask(&enic->intr[i]); + + enic_synchronize_irqs(enic); + del_timer_sync(&enic->notify_timer); spin_lock(&enic->devcmd_lock); vnic_dev_disable(enic->vdev); spin_unlock(&enic->devcmd_lock); napi_disable(&enic->napi); - netif_stop_queue(netdev); - - for (i = 0; i < enic->intr_count; i++) - vnic_intr_mask(&enic->intr[i]); + netif_carrier_off(netdev); + netif_tx_disable(netdev); for (i = 0; i < enic->wq_count; i++) { err = vnic_wq_disable(&enic->wq[i]); @@ -1436,11 +1429,6 @@ static int enic_stop(struct net_device *netdev) spin_unlock(&enic->devcmd_lock); enic_free_intr(enic); - (void)vnic_cq_service(&enic->cq[ENIC_CQ_RQ], - -1, enic_rq_service_drop, NULL); - (void)vnic_cq_service(&enic->cq[ENIC_CQ_WQ], - -1, enic_wq_service, NULL); - for (i = 0; i < enic->wq_count; i++) vnic_wq_clean(&enic->wq[i], enic_free_wq_buf); for (i = 0; i < enic->rq_count; i++) diff --git a/drivers/net/enic/vnic_intr.h b/drivers/net/enic/vnic_intr.h index 9a53604..f79a722 100644 --- a/drivers/net/enic/vnic_intr.h +++ b/drivers/net/enic/vnic_intr.h @@ -61,6 +61,7 @@ static inline void vnic_intr_unmask(struct vnic_intr *intr) static inline void vnic_intr_mask(struct vnic_intr *intr) { iowrite32(1, &intr->ctrl->mask); + (void)ioread32(&intr->ctrl->mask); } static inline void vnic_intr_return_credits(struct vnic_intr *intr,