1225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier/* 2225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved. 3225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * 4225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * This software is available to you under a choice of one of two 5225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * licenses. You may choose to be licensed under the terms of the GNU 6225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * General Public License (GPL) Version 2, available from the file 7225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * COPYING in the main directory of this source tree, or the 8225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * OpenIB.org BSD license below: 9225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * 10225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * Redistribution and use in source and binary forms, with or 11225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * without modification, are permitted provided that the following 12225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * conditions are met: 13225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * 14225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * - Redistributions of source code must retain the above 15225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * copyright notice, this list of conditions and the following 16225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * disclaimer. 17225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * 18225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * - Redistributions in binary form must reproduce the above 19225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * copyright notice, this list of conditions and the following 20225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * disclaimer in the documentation and/or other materials 21225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * provided with the distribution. 22225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * 23225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier * SOFTWARE. 31225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier */ 32225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier 33fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen#include <rdma/ib_addr.h> 344c3eb3ca13966508bcb64f39dcdef48be22f1731Eli Cohen#include <rdma/ib_cache.h> 35fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 365a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 37fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen#include <linux/inet.h> 38fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen#include <linux/string.h> 395a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo 40225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier#include "mlx4_ib.h" 41225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier 42fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohenint mlx4_ib_resolve_grh(struct mlx4_ib_dev *dev, const struct ib_ah_attr *ah_attr, 43fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen u8 *mac, int *is_mcast, u8 port) 44225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier{ 45fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen struct in6_addr in6; 46225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier 47fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen *is_mcast = 0; 48225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier 49fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen memcpy(&in6, ah_attr->grh.dgid.raw, sizeof in6); 50fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen if (rdma_link_local_addr(&in6)) 51fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen rdma_get_ll_mac(&in6, mac); 52fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen else if (rdma_is_multicast_addr(&in6)) { 53fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen rdma_get_mcast_mac(&in6, mac); 54fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen *is_mcast = 1; 55fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen } else 56fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen return -EINVAL; 57225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier 58fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen return 0; 59fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen} 60fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 61fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohenstatic struct ib_ah *create_ib_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr, 62fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen struct mlx4_ib_ah *ah) 63fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen{ 64fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen struct mlx4_dev *dev = to_mdev(pd->device)->dev; 65fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 66fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah->av.ib.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24)); 67fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah->av.ib.g_slid = ah_attr->src_path_bits; 68225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier if (ah_attr->ah_flags & IB_AH_GRH) { 69fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah->av.ib.g_slid |= 0x80; 70fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah->av.ib.gid_index = ah_attr->grh.sgid_index; 71fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah->av.ib.hop_limit = ah_attr->grh.hop_limit; 72fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah->av.ib.sl_tclass_flowlabel |= 73225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier cpu_to_be32((ah_attr->grh.traffic_class << 20) | 74225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier ah_attr->grh.flow_label); 75fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen memcpy(ah->av.ib.dgid, ah_attr->grh.dgid.raw, 16); 76fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen } 77fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 78fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah->av.ib.dlid = cpu_to_be16(ah_attr->dlid); 79fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen if (ah_attr->static_rate) { 80fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah->av.ib.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET; 81fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen while (ah->av.ib.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && 82fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen !(1 << ah->av.ib.stat_rate & dev->caps.stat_rate_support)) 83fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen --ah->av.ib.stat_rate; 84225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier } 85fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah->av.ib.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28); 86225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier 87225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier return &ah->ibah; 88225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier} 89225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier 90fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohenstatic struct ib_ah *create_iboe_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr, 91fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen struct mlx4_ib_ah *ah) 92fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen{ 93fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen struct mlx4_ib_dev *ibdev = to_mdev(pd->device); 94fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen struct mlx4_dev *dev = ibdev->dev; 954c3eb3ca13966508bcb64f39dcdef48be22f1731Eli Cohen union ib_gid sgid; 96fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen u8 mac[6]; 97fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen int err; 98fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen int is_mcast; 994c3eb3ca13966508bcb64f39dcdef48be22f1731Eli Cohen u16 vlan_tag; 100fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 101fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen err = mlx4_ib_resolve_grh(ibdev, ah_attr, mac, &is_mcast, ah_attr->port_num); 102fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen if (err) 103fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen return ERR_PTR(err); 104fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 105fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen memcpy(ah->av.eth.mac, mac, 6); 1064c3eb3ca13966508bcb64f39dcdef48be22f1731Eli Cohen err = ib_get_cached_gid(pd->device, ah_attr->port_num, ah_attr->grh.sgid_index, &sgid); 1074c3eb3ca13966508bcb64f39dcdef48be22f1731Eli Cohen if (err) 1084c3eb3ca13966508bcb64f39dcdef48be22f1731Eli Cohen return ERR_PTR(err); 1094c3eb3ca13966508bcb64f39dcdef48be22f1731Eli Cohen vlan_tag = rdma_get_vlan_id(&sgid); 1104c3eb3ca13966508bcb64f39dcdef48be22f1731Eli Cohen if (vlan_tag < 0x1000) 1114c3eb3ca13966508bcb64f39dcdef48be22f1731Eli Cohen vlan_tag |= (ah_attr->sl & 7) << 13; 112fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah->av.eth.port_pd = cpu_to_be32(to_mpd(pd)->pdn | (ah_attr->port_num << 24)); 113fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah->av.eth.gid_index = ah_attr->grh.sgid_index; 1144c3eb3ca13966508bcb64f39dcdef48be22f1731Eli Cohen ah->av.eth.vlan = cpu_to_be16(vlan_tag); 115fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen if (ah_attr->static_rate) { 116fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah->av.eth.stat_rate = ah_attr->static_rate + MLX4_STAT_RATE_OFFSET; 117fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen while (ah->av.eth.stat_rate > IB_RATE_2_5_GBPS + MLX4_STAT_RATE_OFFSET && 118fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen !(1 << ah->av.eth.stat_rate & dev->caps.stat_rate_support)) 119fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen --ah->av.eth.stat_rate; 120fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen } 121fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 122fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen /* 123fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen * HW requires multicast LID so we just choose one. 124fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen */ 125fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen if (is_mcast) 126fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah->av.ib.dlid = cpu_to_be16(0xc000); 127fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 128fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen memcpy(ah->av.eth.dgid, ah_attr->grh.dgid.raw, 16); 1299106c410697427363517ca6b4f463698aebc5f25Or Gerlitz ah->av.eth.sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 29); 130fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 131fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen return &ah->ibah; 132fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen} 133fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 134fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohenstruct ib_ah *mlx4_ib_create_ah(struct ib_pd *pd, struct ib_ah_attr *ah_attr) 135fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen{ 136fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen struct mlx4_ib_ah *ah; 137fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen struct ib_ah *ret; 138fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 139fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah = kzalloc(sizeof *ah, GFP_ATOMIC); 140fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen if (!ah) 141fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen return ERR_PTR(-ENOMEM); 142fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 143fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen if (rdma_port_get_link_layer(pd->device, ah_attr->port_num) == IB_LINK_LAYER_ETHERNET) { 144fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen if (!(ah_attr->ah_flags & IB_AH_GRH)) { 145fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ret = ERR_PTR(-EINVAL); 146fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen } else { 147fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen /* 148fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen * TBD: need to handle the case when we get 149fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen * called in an atomic context and there we 150fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen * might sleep. We don't expect this 151fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen * currently since we're working with link 152fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen * local addresses which we can translate 153fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen * without going to sleep. 154fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen */ 155fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ret = create_iboe_ah(pd, ah_attr, ah); 156fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen } 157fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 158fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen if (IS_ERR(ret)) 159fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen kfree(ah); 160fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 161fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen return ret; 162fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen } else 163fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen return create_ib_ah(pd, ah_attr, ah); /* never fails */ 164fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen} 165fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen 166225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreierint mlx4_ib_query_ah(struct ib_ah *ibah, struct ib_ah_attr *ah_attr) 167225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier{ 168225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier struct mlx4_ib_ah *ah = to_mah(ibah); 169fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen enum rdma_link_layer ll; 170225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier 171225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier memset(ah_attr, 0, sizeof *ah_attr); 172fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah_attr->sl = be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 28; 173fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah_attr->port_num = be32_to_cpu(ah->av.ib.port_pd) >> 24; 174fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ll = rdma_port_get_link_layer(ibah->device, ah_attr->port_num); 175fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah_attr->dlid = ll == IB_LINK_LAYER_INFINIBAND ? be16_to_cpu(ah->av.ib.dlid) : 0; 176fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen if (ah->av.ib.stat_rate) 177fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah_attr->static_rate = ah->av.ib.stat_rate - MLX4_STAT_RATE_OFFSET; 178fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah_attr->src_path_bits = ah->av.ib.g_slid & 0x7F; 179225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier 180225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier if (mlx4_ib_ah_grh_present(ah)) { 181225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier ah_attr->ah_flags = IB_AH_GRH; 182225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier 183225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier ah_attr->grh.traffic_class = 184fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) >> 20; 185225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier ah_attr->grh.flow_label = 186fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen be32_to_cpu(ah->av.ib.sl_tclass_flowlabel) & 0xfffff; 187fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah_attr->grh.hop_limit = ah->av.ib.hop_limit; 188fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen ah_attr->grh.sgid_index = ah->av.ib.gid_index; 189fa417f7b520ee60b39f7e23528d2030af30a07d1Eli Cohen memcpy(ah_attr->grh.dgid.raw, ah->av.ib.dgid, 16); 190225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier } 191225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier 192225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier return 0; 193225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier} 194225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier 195225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreierint mlx4_ib_destroy_ah(struct ib_ah *ah) 196225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier{ 197225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier kfree(to_mah(ah)); 198225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier return 0; 199225c7b1feef1b41170f7037a5b10a65cd8a42c54Roland Dreier} 200