From mboxrd@z Thu Jan 1 00:00:00 1970 From: Roland Dreier Subject: [PATCH/RFC] mlx4_core: Clean up error flow in mlx4_register_mac() Date: Tue, 20 Sep 2011 00:53:47 -0700 Message-ID: <1316505227-6031-1-git-send-email-roland@kernel.org> Return-path: Sender: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Yevgeny Petrilin , linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: Roland Dreier List-Id: linux-rdma@vger.kernel.org From: Roland Dreier Fix a leak of entry if radix_tree_insert() fails. Also, reduce the indentation and make the flow easier to read by sticking to the conventional err = do_something(); if (err) return err; err = do_another(); if (err) return err; rather than mixing the direction of the test as err = do_something(); if (!err) { err = do_another(); if (err) return err; } else return err; Signed-off-by: Roland Dreier --- drivers/net/mlx4/port.c | 30 +++++++++++++++++------------- 1 files changed, 17 insertions(+), 13 deletions(-) diff --git a/drivers/net/mlx4/port.c b/drivers/net/mlx4/port.c index 609e0ec..ef10113 100644 --- a/drivers/net/mlx4/port.c +++ b/drivers/net/mlx4/port.c @@ -148,22 +148,26 @@ int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac, int *qpn, u8 wrap) if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER) { err = mlx4_uc_steer_add(dev, port, mac, qpn, 1); - if (!err) { - entry = kmalloc(sizeof *entry, GFP_KERNEL); - if (!entry) { - mlx4_uc_steer_release(dev, port, mac, *qpn, 1); - return -ENOMEM; - } - entry->mac = mac; - err = radix_tree_insert(&info->mac_tree, *qpn, entry); - if (err) { - mlx4_uc_steer_release(dev, port, mac, *qpn, 1); - return err; - } - } else + if (err) return err; + + entry = kmalloc(sizeof *entry, GFP_KERNEL); + if (!entry) { + mlx4_uc_steer_release(dev, port, mac, *qpn, 1); + return -ENOMEM; + } + + entry->mac = mac; + err = radix_tree_insert(&info->mac_tree, *qpn, entry); + if (err) { + kfree(entry); + mlx4_uc_steer_release(dev, port, mac, *qpn, 1); + return err; + } } + mlx4_dbg(dev, "Registering MAC: 0x%llx\n", (unsigned long long) mac); + mutex_lock(&table->mutex); for (i = 0; i < MLX4_MAX_MAC_NUM - 1; i++) { if (free < 0 && !table->refs[i]) { -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html