From a02bdd423d844f5beb3196922f07c85c2f7691b8 Mon Sep 17 00:00:00 2001 From: Shahed Shaikh Date: Fri, 3 Jan 2014 01:34:28 -0500 Subject: [PATCH] qlcnic: Fix bug in Tx completion path o Driver is using common tx_clean_lock for all Tx queues. This patch adds per queue tx_clean_lock. o Driver is not updating sw_consumer while processing Tx completion when interface is going down. Fixed in this patch. Signed-off-by: Shahed Shaikh Signed-off-by: Manish Chopra Signed-off-by: David S. Miller --- drivers/net/ethernet/qlogic/qlcnic/qlcnic.h | 3 ++- drivers/net/ethernet/qlogic/qlcnic/qlcnic_init.c | 4 ++++ drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c | 8 +++++--- drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c | 4 +--- 4 files changed, 12 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h b/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h index 4dfef81..ff80cd8 100644 --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h @@ -579,6 +579,8 @@ struct qlcnic_host_tx_ring { dma_addr_t phys_addr; dma_addr_t hw_cons_phys_addr; struct netdev_queue *txq; + /* Lock to protect Tx descriptors cleanup */ + spinlock_t tx_clean_lock; } ____cacheline_internodealigned_in_smp; /* @@ -1095,7 +1097,6 @@ struct qlcnic_adapter { struct qlcnic_filter_hash rx_fhash; struct list_head vf_mc_list; - spinlock_t tx_clean_lock; spinlock_t mac_learn_lock; /* spinlock for catching rcv filters for eswitch traffic */ spinlock_t rx_mac_learn_lock; diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_init.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_init.c index e9c21e5..c4262c2 100644 --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_init.c +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_init.c @@ -134,6 +134,8 @@ void qlcnic_release_tx_buffers(struct qlcnic_adapter *adapter, struct qlcnic_skb_frag *buffrag; int i, j; + spin_lock(&tx_ring->tx_clean_lock); + cmd_buf = tx_ring->cmd_buf_arr; for (i = 0; i < tx_ring->num_desc; i++) { buffrag = cmd_buf->frag_array; @@ -157,6 +159,8 @@ void qlcnic_release_tx_buffers(struct qlcnic_adapter *adapter, } cmd_buf++; } + + spin_unlock(&tx_ring->tx_clean_lock); } void qlcnic_free_sw_resources(struct qlcnic_adapter *adapter) diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c index 1362976..ad1531a 100644 --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c @@ -782,7 +782,7 @@ static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter, struct net_device *netdev = adapter->netdev; struct qlcnic_skb_frag *frag; - if (!spin_trylock(&adapter->tx_clean_lock)) + if (!spin_trylock(&tx_ring->tx_clean_lock)) return 1; sw_consumer = tx_ring->sw_consumer; @@ -811,8 +811,9 @@ static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter, break; } + tx_ring->sw_consumer = sw_consumer; + if (count && netif_running(netdev)) { - tx_ring->sw_consumer = sw_consumer; smp_mb(); if (netif_tx_queue_stopped(tx_ring->txq) && netif_carrier_ok(netdev)) { @@ -838,7 +839,8 @@ static int qlcnic_process_cmd_ring(struct qlcnic_adapter *adapter, */ hw_consumer = le32_to_cpu(*(tx_ring->hw_consumer)); done = (sw_consumer == hw_consumer); - spin_unlock(&adapter->tx_clean_lock); + + spin_unlock(&tx_ring->tx_clean_lock); return done; } diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c index 2c8cac0..b8a245a 100644 --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c @@ -1756,7 +1756,6 @@ void __qlcnic_down(struct qlcnic_adapter *adapter, struct net_device *netdev) if (qlcnic_sriov_vf_check(adapter)) qlcnic_sriov_cleanup_async_list(&adapter->ahw->sriov->bc); smp_mb(); - spin_lock(&adapter->tx_clean_lock); netif_carrier_off(netdev); adapter->ahw->linkup = 0; netif_tx_disable(netdev); @@ -1777,7 +1776,6 @@ void __qlcnic_down(struct qlcnic_adapter *adapter, struct net_device *netdev) for (ring = 0; ring < adapter->drv_tx_rings; ring++) qlcnic_release_tx_buffers(adapter, &adapter->tx_ring[ring]); - spin_unlock(&adapter->tx_clean_lock); } /* Usage: During suspend and firmware recovery module */ @@ -2172,6 +2170,7 @@ int qlcnic_alloc_tx_rings(struct qlcnic_adapter *adapter, } memset(cmd_buf_arr, 0, TX_BUFF_RINGSIZE(tx_ring)); tx_ring->cmd_buf_arr = cmd_buf_arr; + spin_lock_init(&tx_ring->tx_clean_lock); } if (qlcnic_83xx_check(adapter) || @@ -2299,7 +2298,6 @@ qlcnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) rwlock_init(&adapter->ahw->crb_lock); mutex_init(&adapter->ahw->mem_lock); - spin_lock_init(&adapter->tx_clean_lock); INIT_LIST_HEAD(&adapter->mac_list); qlcnic_register_dcb(adapter); -- 2.7.4