diff options
| author | Parav Pandit <parav@mellanox.com> | 2019-05-02 09:48:06 +0200 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2019-05-03 16:10:03 +0200 |
| commit | 5102eca9039ba1df6d2e8756b0c030676021f56b (patch) | |
| tree | 6f85606e632f682eba10f43d13160a1c36601f09 /net/smc/smc_ib.c | |
| parent | RDMA/rxe: Use rdma_read_gid_attr_ndev_rcu to access netdev (diff) | |
| download | linux-5102eca9039ba1df6d2e8756b0c030676021f56b.tar.xz linux-5102eca9039ba1df6d2e8756b0c030676021f56b.zip | |
net/smc: Use rdma_read_gid_l2_fields to L2 fields
Use core provided API to fill the source MAC address and use
rdma_read_gid_attr_ndev_rcu() to get stable netdev.
This is preparation patch to allow gid attribute to become NULL when
associated net device is removed.
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'net/smc/smc_ib.c')
| -rw-r--r-- | net/smc/smc_ib.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/net/smc/smc_ib.c b/net/smc/smc_ib.c index 53f429c04843..d14ca4af6f94 100644 --- a/net/smc/smc_ib.c +++ b/net/smc/smc_ib.c @@ -146,18 +146,13 @@ out: static int smc_ib_fill_mac(struct smc_ib_device *smcibdev, u8 ibport) { const struct ib_gid_attr *attr; - int rc = 0; + int rc; attr = rdma_get_gid_attr(smcibdev->ibdev, ibport, 0); if (IS_ERR(attr)) return -ENODEV; - if (attr->ndev) - memcpy(smcibdev->mac[ibport - 1], attr->ndev->dev_addr, - ETH_ALEN); - else - rc = -ENODEV; - + rc = rdma_read_gid_l2_fields(attr, NULL, smcibdev->mac[ibport - 1]); rdma_put_gid_attr(attr); return rc; } @@ -185,6 +180,7 @@ int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport, unsigned short vlan_id, u8 gid[], u8 *sgid_index) { const struct ib_gid_attr *attr; + const struct net_device *ndev; int i; for (i = 0; i < smcibdev->pattr[ibport - 1].gid_tbl_len; i++) { @@ -192,11 +188,14 @@ int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport, if (IS_ERR(attr)) continue; - if (attr->ndev && + rcu_read_lock(); + ndev = rdma_read_gid_attr_ndev_rcu(attr); + if (!IS_ERR(ndev) && ((!vlan_id && !is_vlan_dev(attr->ndev)) || (vlan_id && is_vlan_dev(attr->ndev) && vlan_dev_vlan_id(attr->ndev) == vlan_id)) && attr->gid_type == IB_GID_TYPE_ROCE) { + rcu_read_unlock(); if (gid) memcpy(gid, &attr->gid, SMC_GID_SIZE); if (sgid_index) @@ -204,6 +203,7 @@ int smc_ib_determine_gid(struct smc_ib_device *smcibdev, u8 ibport, rdma_put_gid_attr(attr); return 0; } + rcu_read_unlock(); rdma_put_gid_attr(attr); } return -ENODEV; |