From 34f0f4e3f48810b0ba080bf2a65370b0cc179c51 Mon Sep 17 00:00:00 2001 From: Thomas Falcon Date: Tue, 13 Feb 2018 18:23:40 -0600 Subject: [PATCH 1/4] ibmvnic: Fix login buffer memory leaks During device bringup, the driver exchanges login buffers with firmware. These buffers contain information such number of TX and RX queues alloted to the device, RX buffer size, etc. These buffers weren't being properly freed on device reset or close. We can free the buffer we send to firmware as soon as we get a response. There is information in the response buffer that the driver needs for normal operation so retain it until the next reset or removal. Signed-off-by: Thomas Falcon Signed-off-by: David S. Miller --- drivers/net/ethernet/ibm/ibmvnic.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index 1a2d8d66f527..8625f5e5b6d4 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -791,6 +791,18 @@ static int ibmvnic_login(struct net_device *netdev) return 0; } +static void release_login_buffer(struct ibmvnic_adapter *adapter) +{ + kfree(adapter->login_buf); + adapter->login_buf = NULL; +} + +static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) +{ + kfree(adapter->login_rsp_buf); + adapter->login_rsp_buf = NULL; +} + static void release_resources(struct ibmvnic_adapter *adapter) { int i; @@ -813,6 +825,8 @@ static void release_resources(struct ibmvnic_adapter *adapter) } } } + + release_login_rsp_buffer(adapter); } static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) @@ -3013,6 +3027,7 @@ static void send_login(struct ibmvnic_adapter *adapter) struct vnic_login_client_data *vlcd; int i; + release_login_rsp_buffer(adapter); client_data_len = vnic_client_data_len(adapter); buffer_size = @@ -3708,6 +3723,7 @@ static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz, DMA_BIDIRECTIONAL); + release_login_buffer(adapter); dma_unmap_single(dev, adapter->login_rsp_buf_token, adapter->login_rsp_buf_sz, DMA_BIDIRECTIONAL); From 6e4842ddfc2b08931ebd6c0bc95322dd56e5232b Mon Sep 17 00:00:00 2001 From: Thomas Falcon Date: Tue, 13 Feb 2018 18:23:41 -0600 Subject: [PATCH 2/4] ibmvnic: Fix NAPI structures memory leak This memory is allocated during initialization but never freed, so do that now. Signed-off-by: Thomas Falcon Signed-off-by: David S. Miller --- drivers/net/ethernet/ibm/ibmvnic.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index 8625f5e5b6d4..23e0b423025a 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -825,6 +825,8 @@ static void release_resources(struct ibmvnic_adapter *adapter) } } } + kfree(adapter->napi); + adapter->napi = NULL; release_login_rsp_buffer(adapter); } From 4b9b0f01350500173f17e2b2e65beb4df4ef99c7 Mon Sep 17 00:00:00 2001 From: Thomas Falcon Date: Tue, 13 Feb 2018 18:23:42 -0600 Subject: [PATCH 3/4] ibmvnic: Free RX socket buffer in case of adapter error If a RX buffer is returned to the client driver with an error, free the corresponding socket buffer before continuing. Signed-off-by: Thomas Falcon Signed-off-by: David S. Miller --- drivers/net/ethernet/ibm/ibmvnic.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index 23e0b423025a..bc93fa2be7fa 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -1869,6 +1869,7 @@ restart_poll: be16_to_cpu(next->rx_comp.rc)); /* free the entry */ next->rx_comp.first = 0; + dev_kfree_skb_any(rx_buff->skb); remove_buff_from_pool(adapter, rx_buff); continue; } From d0869c0071e40c4407d1a4d7c9497653cf47253b Mon Sep 17 00:00:00 2001 From: Thomas Falcon Date: Tue, 13 Feb 2018 18:23:43 -0600 Subject: [PATCH 4/4] ibmvnic: Clean RX pool buffers during device close During device close or reset, there were some cases of outstanding RX socket buffers not being freed. Include a function similar to the one that already exists to clean TX socket buffers in this case. Signed-off-by: Thomas Falcon Signed-off-by: David S. Miller --- drivers/net/ethernet/ibm/ibmvnic.c | 31 +++++++++++++++++++++++++++++- 1 file changed, 30 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index bc93fa2be7fa..996f47568f9e 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -1073,6 +1073,35 @@ static int ibmvnic_open(struct net_device *netdev) return rc; } +static void clean_rx_pools(struct ibmvnic_adapter *adapter) +{ + struct ibmvnic_rx_pool *rx_pool; + u64 rx_entries; + int rx_scrqs; + int i, j; + + if (!adapter->rx_pool) + return; + + rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); + rx_entries = adapter->req_rx_add_entries_per_subcrq; + + /* Free any remaining skbs in the rx buffer pools */ + for (i = 0; i < rx_scrqs; i++) { + rx_pool = &adapter->rx_pool[i]; + if (!rx_pool) + continue; + + netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); + for (j = 0; j < rx_entries; j++) { + if (rx_pool->rx_buff[j].skb) { + dev_kfree_skb_any(rx_pool->rx_buff[j].skb); + rx_pool->rx_buff[j].skb = NULL; + } + } + } +} + static void clean_tx_pools(struct ibmvnic_adapter *adapter) { struct ibmvnic_tx_pool *tx_pool; @@ -1150,7 +1179,7 @@ static int __ibmvnic_close(struct net_device *netdev) } } } - + clean_rx_pools(adapter); clean_tx_pools(adapter); adapter->state = VNIC_CLOSED; return rc;