From 7d0b345156d0678fbbbf885f991c6d83f23d70f1 Mon Sep 17 00:00:00 2001 From: Jian Shen Date: Fri, 24 Apr 2020 10:23:12 +0800 Subject: [PATCH] net: hns3: use mutex vport_lock instead of mutex umv_lock Currently, the driver use mutex umv_lock to protect the variable vport->share_umv_size. And there is already a mutex vport_lock being defined in the driver, which is designed to protect the resource of vport. So we can use vport_lock instead of umv_lock. Furthermore, there is a time window for protect share_umv_size between checking UMV space and doing MAC configuration in the lin function hclge_add_uc_addr_common(). It should be extended. This patch uses mutex vport_lock intead of spin lock umv_lock to protect share_umv_size, and adjusts the mutex's range. Signed-off-by: Jian Shen Signed-off-by: Huazhong Tan Signed-off-by: David S. Miller --- .../hisilicon/hns3/hns3pf/hclge_main.c | 31 ++++++++++++------- .../hisilicon/hns3/hns3pf/hclge_main.h | 1 - 2 files changed, 19 insertions(+), 13 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c index 71ff0fa64f46..177ef5e93d06 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c @@ -7250,7 +7250,6 @@ static int hclge_init_umv_space(struct hclge_dev *hdev) "failed to alloc umv space, want %u, get %u\n", hdev->wanted_umv_size, allocated_size); - mutex_init(&hdev->umv_mutex); hdev->max_umv_size = allocated_size; hdev->priv_umv_size = hdev->max_umv_size / (hdev->num_alloc_vport + 1); hdev->share_umv_size = hdev->priv_umv_size + @@ -7269,21 +7268,25 @@ static void hclge_reset_umv_space(struct hclge_dev *hdev) vport->used_umv_num = 0; } - mutex_lock(&hdev->umv_mutex); + mutex_lock(&hdev->vport_lock); hdev->share_umv_size = hdev->priv_umv_size + hdev->max_umv_size % (hdev->num_alloc_vport + 1); - mutex_unlock(&hdev->umv_mutex); + mutex_unlock(&hdev->vport_lock); } -static bool hclge_is_umv_space_full(struct hclge_vport *vport) +static bool hclge_is_umv_space_full(struct hclge_vport *vport, bool need_lock) { struct hclge_dev *hdev = vport->back; bool is_full; - mutex_lock(&hdev->umv_mutex); + if (need_lock) + mutex_lock(&hdev->vport_lock); + is_full = (vport->used_umv_num >= hdev->priv_umv_size && hdev->share_umv_size == 0); - mutex_unlock(&hdev->umv_mutex); + + if (need_lock) + mutex_unlock(&hdev->vport_lock); return is_full; } @@ -7292,7 +7295,6 @@ static void hclge_update_umv_space(struct hclge_vport *vport, bool is_free) { struct hclge_dev *hdev = vport->back; - mutex_lock(&hdev->umv_mutex); if (is_free) { if (vport->used_umv_num > hdev->priv_umv_size) hdev->share_umv_size++; @@ -7305,7 +7307,6 @@ static void hclge_update_umv_space(struct hclge_vport *vport, bool is_free) hdev->share_umv_size--; vport->used_umv_num++; } - mutex_unlock(&hdev->umv_mutex); } static struct hclge_mac_node *hclge_find_mac_node(struct list_head *list, @@ -7446,12 +7447,15 @@ int hclge_add_uc_addr_common(struct hclge_vport *vport, */ ret = hclge_lookup_mac_vlan_tbl(vport, &req, &desc, false); if (ret == -ENOENT) { - if (!hclge_is_umv_space_full(vport)) { + mutex_lock(&hdev->vport_lock); + if (!hclge_is_umv_space_full(vport, false)) { ret = hclge_add_mac_vlan_tbl(vport, &req, NULL); if (!ret) hclge_update_umv_space(vport, false); + mutex_unlock(&hdev->vport_lock); return ret; } + mutex_unlock(&hdev->vport_lock); if (!(vport->overflow_promisc_flags & HNAE3_OVERFLOW_UPE)) dev_err(&hdev->pdev->dev, "UC MAC table full(%u)\n", @@ -7503,10 +7507,13 @@ int hclge_rm_uc_addr_common(struct hclge_vport *vport, hnae3_set_bit(req.entry_type, HCLGE_MAC_VLAN_BIT0_EN_B, 0); hclge_prepare_mac_addr(&req, addr, false); ret = hclge_remove_mac_vlan_tbl(vport, &req); - if (!ret) + if (!ret) { + mutex_lock(&hdev->vport_lock); hclge_update_umv_space(vport, true); - else if (ret == -ENOENT) + mutex_unlock(&hdev->vport_lock); + } else if (ret == -ENOENT) { ret = 0; + } return ret; } @@ -10163,7 +10170,7 @@ static int hclge_set_vf_spoofchk(struct hnae3_handle *handle, int vf, dev_warn(&hdev->pdev->dev, "vf %d vlan table is full, enable spoof check may cause its packet send fail\n", vf); - else if (enable && hclge_is_umv_space_full(vport)) + else if (enable && hclge_is_umv_space_full(vport, true)) dev_warn(&hdev->pdev->dev, "vf %d mac table is full, enable spoof check may cause its packet send fail\n", vf); diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h index 85180f4a9b4d..8e69651f8bf1 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.h @@ -831,7 +831,6 @@ struct hclge_dev { u16 priv_umv_size; /* unicast mac vlan space shared by PF and its VFs */ u16 share_umv_size; - struct mutex umv_mutex; /* protect share_umv_size */ DECLARE_KFIFO(mac_tnl_log, struct hclge_mac_tnl_stats, HCLGE_MAC_TNL_LOG_SIZE);