RDMA/hns: Check return value of kzalloc
When lp_qp_work is NULL, we should return ENOMEM. In order to do so, we had to make some upper layer functions return a value instead of being void type so we can propagate the error up the stack. This patch fixes the smatch error as below: drivers/infiniband/hw/hns/hns_roce_hw_v1.c:918 hns_roce_v1_recreate_lp_qp() error: potential null dereference 'lp_qp_work'. (kzalloc returns null) Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com> Signed-off-by: Lijun Ou <oulijun@huawei.com> Signed-off-by: Shaobo Xu <xushaobo2@huawei.com> Signed-off-by: Doug Ledford <dledford@redhat.com>hifive-unleashed-5.1
parent
f44c863be2
commit
a74dc41d49
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@ -581,7 +581,7 @@ struct hns_roce_hw {
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int (*chk_mbox)(struct hns_roce_dev *hr_dev, unsigned long timeout);
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void (*set_gid)(struct hns_roce_dev *hr_dev, u8 port, int gid_index,
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union ib_gid *gid);
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void (*set_mac)(struct hns_roce_dev *hr_dev, u8 phy_port, u8 *addr);
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int (*set_mac)(struct hns_roce_dev *hr_dev, u8 phy_port, u8 *addr);
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void (*set_mtu)(struct hns_roce_dev *hr_dev, u8 phy_port,
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enum ib_mtu mtu);
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int (*write_mtpt)(void *mb_buf, struct hns_roce_mr *mr,
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@ -912,6 +912,8 @@ static int hns_roce_v1_recreate_lp_qp(struct hns_roce_dev *hr_dev)
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lp_qp_work = kzalloc(sizeof(struct hns_roce_recreate_lp_qp_work),
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GFP_KERNEL);
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if (!lp_qp_work)
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return -ENOMEM;
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INIT_WORK(&(lp_qp_work->work), hns_roce_v1_recreate_lp_qp_work_fn);
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@ -1719,7 +1721,8 @@ void hns_roce_v1_set_gid(struct hns_roce_dev *hr_dev, u8 port, int gid_index,
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(HNS_ROCE_V1_GID_NUM * gid_idx));
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}
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void hns_roce_v1_set_mac(struct hns_roce_dev *hr_dev, u8 phy_port, u8 *addr)
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static int hns_roce_v1_set_mac(struct hns_roce_dev *hr_dev, u8 phy_port,
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u8 *addr)
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{
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u32 reg_smac_l;
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u16 reg_smac_h;
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@ -1732,8 +1735,13 @@ void hns_roce_v1_set_mac(struct hns_roce_dev *hr_dev, u8 phy_port, u8 *addr)
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* because of smac not equal to dmac.
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* We Need to release and create reserved qp again.
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*/
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if (hr_dev->hw->dereg_mr && hns_roce_v1_recreate_lp_qp(hr_dev))
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dev_warn(&hr_dev->pdev->dev, "recreate lp qp timeout!\n");
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if (hr_dev->hw->dereg_mr) {
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int ret;
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ret = hns_roce_v1_recreate_lp_qp(hr_dev);
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if (ret && ret != -ETIMEDOUT)
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return ret;
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}
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p = (u32 *)(&addr[0]);
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reg_smac_l = *p;
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@ -1748,6 +1756,8 @@ void hns_roce_v1_set_mac(struct hns_roce_dev *hr_dev, u8 phy_port, u8 *addr)
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ROCEE_SMAC_H_ROCEE_SMAC_H_S, reg_smac_h);
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roce_write(hr_dev, ROCEE_SMAC_H_0_REG + phy_port * PHY_PORT_OFFSET,
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val);
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return 0;
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}
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void hns_roce_v1_set_mtu(struct hns_roce_dev *hr_dev, u8 phy_port,
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@ -1068,8 +1068,8 @@ static void hns_roce_v2_set_gid(struct hns_roce_dev *hr_dev, u8 port,
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roce_write(hr_dev, ROCEE_VF_SGID_CFG4_REG + 0x20 * gid_index, val);
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}
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static void hns_roce_v2_set_mac(struct hns_roce_dev *hr_dev, u8 phy_port,
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u8 *addr)
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static int hns_roce_v2_set_mac(struct hns_roce_dev *hr_dev, u8 phy_port,
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u8 *addr)
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{
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u16 reg_smac_h;
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u32 reg_smac_l;
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@ -1084,6 +1084,8 @@ static void hns_roce_v2_set_mac(struct hns_roce_dev *hr_dev, u8 phy_port,
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roce_set_field(val, ROCEE_VF_SMAC_CFG1_VF_SMAC_H_M,
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ROCEE_VF_SMAC_CFG1_VF_SMAC_H_S, reg_smac_h);
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roce_write(hr_dev, ROCEE_VF_SMAC_CFG1_REG + 0x08 * phy_port, val);
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return 0;
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}
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static int hns_roce_v2_write_mtpt(void *mb_buf, struct hns_roce_mr *mr,
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@ -59,19 +59,19 @@ int hns_get_gid_index(struct hns_roce_dev *hr_dev, u8 port, int gid_index)
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}
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EXPORT_SYMBOL_GPL(hns_get_gid_index);
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static void hns_roce_set_mac(struct hns_roce_dev *hr_dev, u8 port, u8 *addr)
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static int hns_roce_set_mac(struct hns_roce_dev *hr_dev, u8 port, u8 *addr)
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{
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u8 phy_port;
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u32 i = 0;
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if (!memcmp(hr_dev->dev_addr[port], addr, MAC_ADDR_OCTET_NUM))
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return;
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return 0;
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for (i = 0; i < MAC_ADDR_OCTET_NUM; i++)
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hr_dev->dev_addr[port][i] = addr[i];
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phy_port = hr_dev->iboe.phy_port[port];
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hr_dev->hw->set_mac(hr_dev, phy_port, addr);
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return hr_dev->hw->set_mac(hr_dev, phy_port, addr);
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}
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static int hns_roce_add_gid(struct ib_device *device, u8 port_num,
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@ -119,6 +119,7 @@ static int handle_en_event(struct hns_roce_dev *hr_dev, u8 port,
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{
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struct device *dev = hr_dev->dev;
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struct net_device *netdev;
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int ret = 0;
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netdev = hr_dev->iboe.netdevs[port];
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if (!netdev) {
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@ -131,7 +132,7 @@ static int handle_en_event(struct hns_roce_dev *hr_dev, u8 port,
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case NETDEV_CHANGE:
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case NETDEV_REGISTER:
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case NETDEV_CHANGEADDR:
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hns_roce_set_mac(hr_dev, port, netdev->dev_addr);
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ret = hns_roce_set_mac(hr_dev, port, netdev->dev_addr);
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break;
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case NETDEV_DOWN:
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/*
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@ -143,7 +144,7 @@ static int handle_en_event(struct hns_roce_dev *hr_dev, u8 port,
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break;
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}
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return 0;
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return ret;
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}
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static int hns_roce_netdev_event(struct notifier_block *self,
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@ -172,13 +173,17 @@ static int hns_roce_netdev_event(struct notifier_block *self,
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static int hns_roce_setup_mtu_mac(struct hns_roce_dev *hr_dev)
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{
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int ret;
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u8 i;
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for (i = 0; i < hr_dev->caps.num_ports; i++) {
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if (hr_dev->hw->set_mtu)
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hr_dev->hw->set_mtu(hr_dev, hr_dev->iboe.phy_port[i],
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hr_dev->caps.max_mtu);
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hns_roce_set_mac(hr_dev, i, hr_dev->iboe.netdevs[i]->dev_addr);
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ret = hns_roce_set_mac(hr_dev, i,
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hr_dev->iboe.netdevs[i]->dev_addr);
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if (ret)
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return ret;
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}
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return 0;
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