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| 1 | +// SPDX-License-Identifier: GPL-2.0 |
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1 | 2 | /* |
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2 | 3 | * dev-path-parser.c - EFI Device Path parser |
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3 | 4 | * Copyright (C) 2016 Lukas Wunner <lukas@wunner.de> |
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.. | .. |
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5 | 6 | * This program is free software; you can redistribute it and/or modify |
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6 | 7 | * it under the terms of the GNU General Public License (version 2) as |
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7 | 8 | * published by the Free Software Foundation. |
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8 | | - * |
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9 | | - * This program is distributed in the hope that it will be useful, |
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10 | | - * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | | - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 | | - * GNU General Public License for more details. |
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13 | | - * |
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14 | | - * You should have received a copy of the GNU General Public License |
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15 | | - * along with this program; if not, see <http://www.gnu.org/licenses/>. |
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16 | 9 | */ |
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17 | 10 | |
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18 | 11 | #include <linux/acpi.h> |
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.. | .. |
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24 | 17 | char uid[11]; /* UINT_MAX + null byte */ |
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25 | 18 | }; |
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26 | 19 | |
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27 | | -static int __init match_acpi_dev(struct device *dev, void *data) |
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| 20 | +static int __init match_acpi_dev(struct device *dev, const void *data) |
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28 | 21 | { |
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29 | | - struct acpi_hid_uid hid_uid = *(struct acpi_hid_uid *)data; |
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| 22 | + struct acpi_hid_uid hid_uid = *(const struct acpi_hid_uid *)data; |
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30 | 23 | struct acpi_device *adev = to_acpi_device(dev); |
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31 | 24 | |
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32 | 25 | if (acpi_match_device_ids(adev, hid_uid.hid)) |
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.. | .. |
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38 | 31 | return !strcmp("0", hid_uid.uid); |
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39 | 32 | } |
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40 | 33 | |
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41 | | -static long __init parse_acpi_path(struct efi_dev_path *node, |
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| 34 | +static long __init parse_acpi_path(const struct efi_dev_path *node, |
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42 | 35 | struct device *parent, struct device **child) |
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43 | 36 | { |
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44 | 37 | struct acpi_hid_uid hid_uid = {}; |
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45 | 38 | struct device *phys_dev; |
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46 | 39 | |
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47 | | - if (node->length != 12) |
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| 40 | + if (node->header.length != 12) |
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48 | 41 | return -EINVAL; |
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49 | 42 | |
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50 | 43 | sprintf(hid_uid.hid[0].id, "%c%c%c%04X", |
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.. | .. |
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76 | 69 | return dev_is_pci(dev) && to_pci_dev(dev)->devfn == devfn; |
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77 | 70 | } |
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78 | 71 | |
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79 | | -static long __init parse_pci_path(struct efi_dev_path *node, |
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| 72 | +static long __init parse_pci_path(const struct efi_dev_path *node, |
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80 | 73 | struct device *parent, struct device **child) |
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81 | 74 | { |
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82 | 75 | unsigned int devfn; |
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83 | 76 | |
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84 | | - if (node->length != 6) |
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| 77 | + if (node->header.length != 6) |
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85 | 78 | return -EINVAL; |
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86 | 79 | if (!parent) |
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87 | 80 | return -EINVAL; |
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.. | .. |
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112 | 105 | * search for a device. |
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113 | 106 | */ |
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114 | 107 | |
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115 | | -static long __init parse_end_path(struct efi_dev_path *node, |
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| 108 | +static long __init parse_end_path(const struct efi_dev_path *node, |
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116 | 109 | struct device *parent, struct device **child) |
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117 | 110 | { |
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118 | | - if (node->length != 4) |
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| 111 | + if (node->header.length != 4) |
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119 | 112 | return -EINVAL; |
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120 | | - if (node->sub_type != EFI_DEV_END_INSTANCE && |
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121 | | - node->sub_type != EFI_DEV_END_ENTIRE) |
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| 113 | + if (node->header.sub_type != EFI_DEV_END_INSTANCE && |
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| 114 | + node->header.sub_type != EFI_DEV_END_ENTIRE) |
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122 | 115 | return -EINVAL; |
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123 | 116 | if (!parent) |
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124 | 117 | return -ENODEV; |
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125 | 118 | |
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126 | 119 | *child = get_device(parent); |
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127 | | - return node->sub_type; |
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| 120 | + return node->header.sub_type; |
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128 | 121 | } |
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129 | 122 | |
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130 | 123 | /** |
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.. | .. |
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163 | 156 | * %ERR_PTR(-EINVAL) if a node is malformed or exceeds @len, |
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164 | 157 | * %ERR_PTR(-ENOTSUPP) if support for a node type is not yet implemented. |
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165 | 158 | */ |
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166 | | -struct device * __init efi_get_device_by_path(struct efi_dev_path **node, |
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| 159 | +struct device * __init efi_get_device_by_path(const struct efi_dev_path **node, |
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167 | 160 | size_t *len) |
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168 | 161 | { |
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169 | 162 | struct device *parent = NULL, *child; |
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.. | .. |
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173 | 166 | return NULL; |
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174 | 167 | |
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175 | 168 | while (!ret) { |
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176 | | - if (*len < 4 || *len < (*node)->length) |
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| 169 | + if (*len < 4 || *len < (*node)->header.length) |
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177 | 170 | ret = -EINVAL; |
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178 | | - else if ((*node)->type == EFI_DEV_ACPI && |
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179 | | - (*node)->sub_type == EFI_DEV_BASIC_ACPI) |
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| 171 | + else if ((*node)->header.type == EFI_DEV_ACPI && |
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| 172 | + (*node)->header.sub_type == EFI_DEV_BASIC_ACPI) |
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180 | 173 | ret = parse_acpi_path(*node, parent, &child); |
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181 | | - else if ((*node)->type == EFI_DEV_HW && |
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182 | | - (*node)->sub_type == EFI_DEV_PCI) |
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| 174 | + else if ((*node)->header.type == EFI_DEV_HW && |
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| 175 | + (*node)->header.sub_type == EFI_DEV_PCI) |
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183 | 176 | ret = parse_pci_path(*node, parent, &child); |
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184 | | - else if (((*node)->type == EFI_DEV_END_PATH || |
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185 | | - (*node)->type == EFI_DEV_END_PATH2)) |
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| 177 | + else if (((*node)->header.type == EFI_DEV_END_PATH || |
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| 178 | + (*node)->header.type == EFI_DEV_END_PATH2)) |
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186 | 179 | ret = parse_end_path(*node, parent, &child); |
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187 | 180 | else |
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188 | 181 | ret = -ENOTSUPP; |
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.. | .. |
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192 | 185 | return ERR_PTR(ret); |
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193 | 186 | |
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194 | 187 | parent = child; |
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195 | | - *node = (void *)*node + (*node)->length; |
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196 | | - *len -= (*node)->length; |
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| 188 | + *node = (void *)*node + (*node)->header.length; |
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| 189 | + *len -= (*node)->header.length; |
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197 | 190 | } |
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198 | 191 | |
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199 | 192 | if (ret == EFI_DEV_END_ENTIRE) |
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