| Start/ | End/ | |||
| True | False | - | Line | Source |
| 1 | #include <linux/config.h> | |||
| 2 | #include <linux/usb.h> | |||
| 3 | #include <linux/module.h> | |||
| 4 | #include <linux/init.h> | |||
| 5 | #include <linux/slab.h> | |||
| 6 | #include <linux/device.h> | |||
| 7 | #include <asm/byteorder.h> | |||
| 8 | #include "usb.h" | |||
| 9 | #include "hcd.h" | |||
| 10 | ||||
| 11 | #define USB_MAXALTSETTING 128 /* Hard limit */ | |||
| 12 | #define USB_MAXENDPOINTS 30 /* Hard limit */ | |||
| 13 | ||||
| 14 | #define USB_MAXCONFIG 8 /* Arbitrary limit */ | |||
| 15 | ||||
| 16 | ||||
| 7 | 0 | 17 | static inline const char *plural(int n) | |
| 18 | { | |||
| 19 | return (n == 1 ? "" : "s"); | |||
| 7 | 0 | - | 19 | ternary-?: n == 1 |
| 7 | 19 | return ( n == 1 ? "" : "s" ) | ||
| 20 | } | |||
| 21 | ||||
| 117 | 0 | 22 | static int find_next_descriptor(unsigned char *buffer, int size, | |
| 23 | int dt1, int dt2, int *num_skipped) | |||
| 24 | { | |||
| 25 | struct usb_descriptor_header *h; | |||
| 26 | int n = 0; | |||
| 27 | unsigned char *buffer0 = buffer; | |||
| 28 | ||||
| 29 | /* Find the next descriptor of type dt1 or dt2 */ | |||
| 87 | 37 | 30 | while (size > 0) { | |
| 31 | h = (struct usb_descriptor_header *) buffer; | |||
| 80 | 7 | 32 | if (h->bDescriptorType == dt1 || h->bDescriptorType == dt2) | |
| 80 | 32 | T || _ | ||
| 0 | - | 32 | F || T | |
| 7 | 32 | F || F | ||
| 80 | 33 | break; | ||
| 34 | buffer += h->bLength; | |||
| 35 | size -= h->bLength; | |||
| 36 | ++n; | |||
| 37 | } | |||
| 38 | ||||
| 39 | /* Store the number of descriptors skipped and return the | |||
| 40 | * number of bytes skipped */ | |||
| 117 | 0 | - | 41 | if (num_skipped) |
| 42 | *num_skipped = n; | |||
| 117 | 43 | return buffer - buffer0; | ||
| 44 | } | |||
| 45 | ||||
| 43 | 0 | 46 | static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum, | |
| 47 | int asnum, struct usb_host_interface *ifp, int num_ep, | |||
| 48 | unsigned char *buffer, int size) | |||
| 49 | { | |||
| 50 | unsigned char *buffer0 = buffer; | |||
| 51 | struct usb_endpoint_descriptor *d; | |||
| 52 | struct usb_host_endpoint *endpoint; | |||
| 53 | int n, i; | |||
| 54 | ||||
| 55 | d = (struct usb_endpoint_descriptor *) buffer; | |||
| 56 | buffer += d->bLength; | |||
| 57 | size -= d->bLength; | |||
| 58 | ||||
| 0 | 43 | - | 59 | if (d->bLength >= USB_DT_ENDPOINT_AUDIO_SIZE) |
| 60 | n = USB_DT_ENDPOINT_AUDIO_SIZE; | |||
| 43 | 0 | - | 61 | else if (d->bLength >= USB_DT_ENDPOINT_SIZE) |
| 62 | n = USB_DT_ENDPOINT_SIZE; | |||
| 63 | else { | |||
| 64 | dev_warn(ddev, "config %d interface %d altsetting %d has an " | |||
| 0 | 0 | - | 64 | ternary-?: ( ddev ) -> driver |
| 65 | "invalid endpoint descriptor of length %d, skipping\n", | |||
| 66 | cfgno, inum, asnum, d->bLength); | |||
| 0 | - | 67 | goto skip_to_next_endpoint_or_interface_descriptor; | |
| 68 | } | |||
| 69 | ||||
| 70 | i = d->bEndpointAddress & ~USB_ENDPOINT_DIR_MASK; | |||
| 0 | 43 | - | 71 | if (i >= 16 || i == 0) { |
| 0 | - | 71 | T || _ | |
| 0 | - | 71 | F || T | |
| 43 | 71 | F || F | ||
| 72 | dev_warn(ddev, "config %d interface %d altsetting %d has an " | |||
| 0 | 0 | - | 72 | ternary-?: ( ddev ) -> driver |
| 73 | "invalid endpoint with address 0x%X, skipping\n", | |||
| 74 | cfgno, inum, asnum, d->bEndpointAddress); | |||
| 0 | - | 75 | goto skip_to_next_endpoint_or_interface_descriptor; | |
| 76 | } | |||
| 77 | ||||
| 78 | /* Only store as many endpoints as we have room for */ | |||
| 0 | 43 | - | 79 | if (ifp->desc.bNumEndpoints >= num_ep) |
| 0 | - | 80 | goto skip_to_next_endpoint_or_interface_descriptor; | |
| 81 | ||||
| 82 | endpoint = &ifp->endpoint[ifp->desc.bNumEndpoints]; | |||
| 83 | ++ifp->desc.bNumEndpoints; | |||
| 84 | ||||
| 85 | memcpy(&endpoint->desc, d, n); | |||
| 86 | INIT_LIST_HEAD(&endpoint->urb_list); | |||
| 87 | ||||
| 88 | /* Skip over any Class Specific or Vendor Specific descriptors; | |||
| 89 | * find the next endpoint or interface descriptor */ | |||
| 90 | endpoint->extra = buffer; | |||
| 91 | i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT, | |||
| 92 | USB_DT_INTERFACE, &n); | |||
| 93 | endpoint->extralen = i; | |||
| 0 | 43 | - | 94 | if (n > 0) |
| 95 | dev_dbg(ddev, "skipped %d descriptor%s after %s\n", | |||
| 0 | 0 | - | 95 | ternary-?: ( ddev ) -> driver |
| 96 | n, plural(n), "endpoint"); | |||
| 43 | 97 | return buffer - buffer0 + i; | ||
| 98 | ||||
| 99 | skip_to_next_endpoint_or_interface_descriptor: | |||
| 100 | i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT, | |||
| 101 | USB_DT_INTERFACE, NULL); | |||
| 0 | - | 102 | return buffer - buffer0 + i; | |
| 103 | } | |||
| 104 | ||||
| 1 | 1 | 105 | void usb_release_interface_cache(struct kref *ref) | |
| 106 | { | |||
| 107 | struct usb_interface_cache *intfc = ref_to_usb_interface_cache(ref); | |||
| 108 | int j; | |||
| 109 | ||||
| 1 | 1 | 110 | for (j = 0; j < intfc->num_altsetting; j++) { | |
| 111 | struct usb_host_interface *alt = &intfc->altsetting[j]; | |||
| 112 | ||||
| 113 | kfree(alt->endpoint); | |||
| 114 | kfree(alt->string); | |||
| 115 | } | |||
| 116 | kfree(intfc); | |||
| 117 | } | |||
| 118 | ||||
| 37 | 0 | 119 | static int usb_parse_interface(struct device *ddev, int cfgno, | |
| 120 | struct usb_host_config *config, unsigned char *buffer, int size, | |||
| 121 | u8 inums[], u8 nalts[]) | |||
| 122 | { | |||
| 123 | unsigned char *buffer0 = buffer; | |||
| 124 | struct usb_interface_descriptor *d; | |||
| 125 | int inum, asnum; | |||
| 126 | struct usb_interface_cache *intfc; | |||
| 127 | struct usb_host_interface *alt; | |||
| 128 | int i, n; | |||
| 129 | int len, retval; | |||
| 130 | int num_ep, num_ep_orig; | |||
| 131 | ||||
| 132 | d = (struct usb_interface_descriptor *) buffer; | |||
| 133 | buffer += d->bLength; | |||
| 134 | size -= d->bLength; | |||
| 135 | ||||
| 0 | 37 | - | 136 | if (d->bLength < USB_DT_INTERFACE_SIZE) |
| 0 | - | 137 | goto skip_to_next_interface_descriptor; | |
| 138 | ||||
| 139 | /* Which interface entry is this? */ | |||
| 140 | intfc = NULL; | |||
| 141 | inum = d->bInterfaceNumber; | |||
| 37 | 0 | - | 142 | for (i = 0; i < config->desc.bNumInterfaces; ++i) { |
| 37 | 0 | - | 143 | if (inums[i] == inum) { |
| 144 | intfc = config->intf_cache[i]; | |||
| 37 | 145 | break; | ||
| 146 | } | |||
| 147 | } | |||
| 0 | 37 | - | 148 | if (!intfc || intfc->num_altsetting >= nalts[i]) |
| 0 | - | 148 | T || _ | |
| 0 | - | 148 | F || T | |
| 37 | 148 | F || F | ||
| 0 | - | 149 | goto skip_to_next_interface_descriptor; | |
| 150 | ||||
| 151 | /* Check for duplicate altsetting entries */ | |||
| 152 | asnum = d->bAlternateSetting; | |||
| 153 | for ((i = 0, alt = &intfc->altsetting[0]); | |||
| 0 | 37 | - | 154 | i < intfc->num_altsetting; |
| 155 | (++i, ++alt)) { | |||
| 0 | 0 | - | 156 | if (alt->desc.bAlternateSetting == asnum) { |
| 157 | dev_warn(ddev, "Duplicate descriptor for config %d " | |||
| 0 | 0 | - | 157 | ternary-?: ( ddev ) -> driver |
| 158 | "interface %d altsetting %d, skipping\n", | |||
| 159 | cfgno, inum, asnum); | |||
| 0 | - | 160 | goto skip_to_next_interface_descriptor; | |
| 161 | } | |||
| 162 | } | |||
| 163 | ||||
| 164 | ++intfc->num_altsetting; | |||
| 165 | memcpy(&alt->desc, d, USB_DT_INTERFACE_SIZE); | |||
| 166 | ||||
| 167 | /* Skip over any Class Specific or Vendor Specific descriptors; | |||
| 168 | * find the first endpoint or interface descriptor */ | |||
| 169 | alt->extra = buffer; | |||
| 170 | i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT, | |||
| 171 | USB_DT_INTERFACE, &n); | |||
| 172 | alt->extralen = i; | |||
| 7 | 30 | 173 | if (n > 0) | |
| 174 | dev_dbg(ddev, "skipped %d descriptor%s after %s\n", | |||
| 7 | 0 | - | 174 | ternary-?: ( ddev ) -> driver |
| 175 | n, plural(n), "interface"); | |||
| 176 | buffer += i; | |||
| 177 | size -= i; | |||
| 178 | ||||
| 179 | /* Allocate space for the right(?) number of endpoints */ | |||
| 180 | num_ep = num_ep_orig = alt->desc.bNumEndpoints; | |||
| 181 | alt->desc.bNumEndpoints = 0; // Use as a counter | |||
| 0 | 37 | - | 182 | if (num_ep > USB_MAXENDPOINTS) { |
| 183 | dev_warn(ddev, "too many endpoints for config %d interface %d " | |||
| 0 | 0 | - | 183 | ternary-?: ( ddev ) -> driver |
| 184 | "altsetting %d: %d, using maximum allowed: %d\n", | |||
| 185 | cfgno, inum, asnum, num_ep, USB_MAXENDPOINTS); | |||
| 186 | num_ep = USB_MAXENDPOINTS; | |||
| 187 | } | |||
| 188 | ||||
| 189 | len = sizeof(struct usb_host_endpoint) * num_ep; | |||
| 190 | alt->endpoint = kzalloc(len, GFP_KERNEL); | |||
| 0 | 37 | - | 191 | if (!alt->endpoint) |
| 0 | - | 192 | return -ENOMEM; | |
| 193 | ||||
| 194 | /* Parse all the endpoint descriptors */ | |||
| 195 | n = 0; | |||
| 43 | 37 | 196 | while (size > 0) { | |
| 197 | if (((struct usb_descriptor_header *) buffer)->bDescriptorType | |||
| 0 | 43 | - | 198 | == USB_DT_INTERFACE) |
| 0 | - | 199 | break; | |
| 200 | retval = usb_parse_endpoint(ddev, cfgno, inum, asnum, alt, | |||
| 201 | num_ep, buffer, size); | |||
| 0 | 43 | - | 202 | if (retval < 0) |
| 0 | - | 203 | return retval; | |
| 204 | ++n; | |||
| 205 | ||||
| 206 | buffer += retval; | |||
| 207 | size -= retval; | |||
| 208 | } | |||
| 209 | ||||
| 0 | 37 | - | 210 | if (n != num_ep_orig) |
| 211 | dev_warn(ddev, "config %d interface %d altsetting %d has %d " | |||
| 0 | 0 | - | 211 | ternary-?: ( ddev ) -> driver |
| 212 | "endpoint descriptor%s, different from the interface " | |||
| 213 | "descriptor's value: %d\n", | |||
| 214 | cfgno, inum, asnum, n, plural(n), num_ep_orig); | |||
| 37 | 215 | return buffer - buffer0; | ||
| 216 | ||||
| 217 | skip_to_next_interface_descriptor: | |||
| 218 | i = find_next_descriptor(buffer, size, USB_DT_INTERFACE, | |||
| 219 | USB_DT_INTERFACE, NULL); | |||
| 0 | - | 220 | return buffer - buffer0 + i; | |
| 221 | } | |||
| 222 | ||||
| 37 | 0 | 223 | static int usb_parse_configuration(struct device *ddev, int cfgidx, | |
| 224 | struct usb_host_config *config, unsigned char *buffer, int size) | |||
| 225 | { | |||
| 226 | unsigned char *buffer0 = buffer; | |||
| 227 | int cfgno; | |||
| 228 | int nintf, nintf_orig; | |||
| 229 | int i, j, n; | |||
| 230 | struct usb_interface_cache *intfc; | |||
| 231 | unsigned char *buffer2; | |||
| 232 | int size2; | |||
| 233 | struct usb_descriptor_header *header; | |||
| 234 | int len, retval; | |||
| 235 | u8 inums[USB_MAXINTERFACES], nalts[USB_MAXINTERFACES]; | |||
| 236 | ||||
| 237 | memcpy(&config->desc, buffer, USB_DT_CONFIG_SIZE); | |||
| 238 | if (config->desc.bDescriptorType != USB_DT_CONFIG || | |||
| 0 | 37 | - | 239 | config->desc.bLength < USB_DT_CONFIG_SIZE) { |
| 0 | - | 239 | T || _ | |
| 0 | - | 239 | F || T | |
| 37 | 239 | F || F | ||
| 240 | dev_err(ddev, "invalid descriptor for config index %d: " | |||
| 0 | 0 | - | 240 | ternary-?: ( ddev ) -> driver |
| 241 | "type = 0x%X, length = %d\n", cfgidx, | |||
| 242 | config->desc.bDescriptorType, config->desc.bLength); | |||
| 0 | - | 243 | return -EINVAL; | |
| 244 | } | |||
| 245 | cfgno = config->desc.bConfigurationValue; | |||
| 246 | ||||
| 247 | buffer += config->desc.bLength; | |||
| 248 | size -= config->desc.bLength; | |||
| 249 | ||||
| 250 | nintf = nintf_orig = config->desc.bNumInterfaces; | |||
| 0 | 37 | - | 251 | if (nintf > USB_MAXINTERFACES) { |
| 252 | dev_warn(ddev, "config %d has too many interfaces: %d, " | |||
| 0 | 0 | - | 252 | ternary-?: ( ddev ) -> driver |
| 253 | "using maximum allowed: %d\n", | |||
| 254 | cfgno, nintf, USB_MAXINTERFACES); | |||
| 255 | nintf = USB_MAXINTERFACES; | |||
| 256 | } | |||
| 257 | ||||
| 258 | /* Go through the descriptors, checking their length and counting the | |||
| 259 | * number of altsettings for each interface */ | |||
| 260 | n = 0; | |||
| 261 | for ((buffer2 = buffer, size2 = size); | |||
| 87 | 37 | 262 | size2 > 0; | |
| 263 | (buffer2 += header->bLength, size2 -= header->bLength)) { | |||
| 264 | ||||
| 0 | 87 | - | 265 | if (size2 < sizeof(struct usb_descriptor_header)) { |
| 266 | dev_warn(ddev, "config %d descriptor has %d excess " | |||
| 0 | 0 | - | 266 | ternary-?: ( ddev ) -> driver |
| 267 | "byte%s, ignoring\n", | |||
| 268 | cfgno, size2, plural(size2)); | |||
| 0 | - | 269 | break; | |
| 270 | } | |||
| 271 | ||||
| 272 | header = (struct usb_descriptor_header *) buffer2; | |||
| 0 | 87 | - | 273 | if ((header->bLength > size2) || (header->bLength < 2)) { |
| 0 | - | 273 | (T) || (_) | |
| 0 | - | 273 | (F) || (T) | |
| 87 | 273 | (F) || (F) | ||
| 274 | dev_warn(ddev, "config %d has an invalid descriptor " | |||
| 0 | 0 | - | 274 | ternary-?: ( ddev ) -> driver |
| 275 | "of length %d, skipping remainder of the config\n", | |||
| 276 | cfgno, header->bLength); | |||
| 0 | - | 277 | break; | |
| 278 | } | |||
| 279 | ||||
| 37 | 50 | 280 | if (header->bDescriptorType == USB_DT_INTERFACE) { | |
| 281 | struct usb_interface_descriptor *d; | |||
| 282 | int inum; | |||
| 283 | ||||
| 284 | d = (struct usb_interface_descriptor *) header; | |||
| 0 | 37 | - | 285 | if (d->bLength < USB_DT_INTERFACE_SIZE) { |
| 286 | dev_warn(ddev, "config %d has an invalid " | |||
| 0 | 0 | - | 286 | ternary-?: ( ddev ) -> driver |
| 287 | "interface descriptor of length %d, " | |||
| 288 | "skipping\n", cfgno, d->bLength); | |||
| 0 | - | 289 | continue; | |
| 290 | } | |||
| 291 | ||||
| 292 | inum = d->bInterfaceNumber; | |||
| 0 | 37 | - | 293 | if (inum >= nintf_orig) |
| 294 | dev_warn(ddev, "config %d has an invalid " | |||
| 0 | 0 | - | 294 | ternary-?: ( ddev ) -> driver |
| 295 | "interface number: %d but max is %d\n", | |||
| 296 | cfgno, inum, nintf_orig - 1); | |||
| 297 | ||||
| 298 | /* Have we already encountered this interface? | |||
| 299 | * Count its altsettings */ | |||
| 0 | 37 | - | 300 | for (i = 0; i < n; ++i) { |
| 0 | 0 | - | 301 | if (inums[i] == inum) |
| 0 | - | 302 | break; | |
| 303 | } | |||
| 0 | 37 | - | 304 | if (i < n) { |
| 0 | 0 | - | 305 | if (nalts[i] < 255) |
| 306 | ++nalts[i]; | |||
| 37 | 0 | - | 307 | } else if (n < USB_MAXINTERFACES) { |
| 308 | inums[n] = inum; | |||
| 309 | nalts[n] = 1; | |||
| 310 | ++n; | |||
| 311 | } | |||
| 312 | ||||
| 313 | } else if (header->bDescriptorType == USB_DT_DEVICE || | |||
| 0 | 50 | - | 314 | header->bDescriptorType == USB_DT_CONFIG) |
| 0 | - | 314 | T || _ | |
| 0 | - | 314 | F || T | |
| 50 | 314 | F || F | ||
| 315 | dev_warn(ddev, "config %d contains an unexpected " | |||
| 0 | 0 | - | 315 | ternary-?: ( ddev ) -> driver |
| 316 | "descriptor of type 0x%X, skipping\n", | |||
| 317 | cfgno, header->bDescriptorType); | |||
| 318 | ||||
| 319 | } /* for ((buffer2 = buffer, size2 = size); ...) */ | |||
| 320 | size = buffer2 - buffer; | |||
| 321 | config->desc.wTotalLength = cpu_to_le16(buffer2 - buffer0); | |||
| 322 | ||||
| 0 | 37 | - | 323 | if (n != nintf) |
| 324 | dev_warn(ddev, "config %d has %d interface%s, different from " | |||
| 0 | 0 | - | 324 | ternary-?: ( ddev ) -> driver |
| 325 | "the descriptor's value: %d\n", | |||
| 326 | cfgno, n, plural(n), nintf_orig); | |||
| 0 | 37 | - | 327 | else if (n == 0) |
| 328 | dev_warn(ddev, "config %d has no interfaces?\n", cfgno); | |||
| 0 | 0 | - | 328 | ternary-?: ( ddev ) -> driver |
| 329 | config->desc.bNumInterfaces = nintf = n; | |||
| 330 | ||||
| 331 | /* Check for missing interface numbers */ | |||
| 37 | 37 | 332 | for (i = 0; i < nintf; ++i) { | |
| 37 | 0 | - | 333 | for (j = 0; j < nintf; ++j) { |
| 37 | 0 | - | 334 | if (inums[j] == i) |
| 37 | 335 | break; | ||
| 336 | } | |||
| 0 | 37 | - | 337 | if (j >= nintf) |
| 338 | dev_warn(ddev, "config %d has no interface number " | |||
| 0 | 0 | - | 338 | ternary-?: ( ddev ) -> driver |
| 339 | "%d\n", cfgno, i); | |||
| 340 | } | |||
| 341 | ||||
| 342 | /* Allocate the usb_interface_caches and altsetting arrays */ | |||
| 37 | 37 | 343 | for (i = 0; i < nintf; ++i) { | |
| 344 | j = nalts[i]; | |||
| 0 | 37 | - | 345 | if (j > USB_MAXALTSETTING) { |
| 346 | dev_warn(ddev, "too many alternate settings for " | |||
| 0 | 0 | - | 346 | ternary-?: ( ddev ) -> driver |
| 347 | "config %d interface %d: %d, " | |||
| 348 | "using maximum allowed: %d\n", | |||
| 349 | cfgno, inums[i], j, USB_MAXALTSETTING); | |||
| 350 | nalts[i] = j = USB_MAXALTSETTING; | |||
| 351 | } | |||
| 352 | ||||
| 353 | len = sizeof(*intfc) + sizeof(struct usb_host_interface) * j; | |||
| 354 | config->intf_cache[i] = intfc = kzalloc(len, GFP_KERNEL); | |||
| 0 | 37 | - | 355 | if (!intfc) |
| 0 | - | 356 | return -ENOMEM; | |
| 357 | kref_init(&intfc->ref); | |||
| 358 | } | |||
| 359 | ||||
| 360 | /* Skip over any Class Specific or Vendor Specific descriptors; | |||
| 361 | * find the first interface descriptor */ | |||
| 362 | config->extra = buffer; | |||
| 363 | i = find_next_descriptor(buffer, size, USB_DT_INTERFACE, | |||
| 364 | USB_DT_INTERFACE, &n); | |||
| 365 | config->extralen = i; | |||
| 0 | 37 | - | 366 | if (n > 0) |
| 367 | dev_dbg(ddev, "skipped %d descriptor%s after %s\n", | |||
| 0 | 0 | - | 367 | ternary-?: ( ddev ) -> driver |
| 368 | n, plural(n), "configuration"); | |||
| 369 | buffer += i; | |||
| 370 | size -= i; | |||
| 371 | ||||
| 372 | /* Parse all the interface/altsetting descriptors */ | |||
| 37 | 37 | 373 | while (size > 0) { | |
| 374 | retval = usb_parse_interface(ddev, cfgno, config, | |||
| 375 | buffer, size, inums, nalts); | |||
| 0 | 37 | - | 376 | if (retval < 0) |
| 0 | - | 377 | return retval; | |
| 378 | ||||
| 379 | buffer += retval; | |||
| 380 | size -= retval; | |||
| 381 | } | |||
| 382 | ||||
| 383 | /* Check for missing altsettings */ | |||
| 37 | 37 | 384 | for (i = 0; i < nintf; ++i) { | |
| 385 | intfc = config->intf_cache[i]; | |||
| 37 | 37 | 386 | for (j = 0; j < intfc->num_altsetting; ++j) { | |
| 37 | 0 | - | 387 | for (n = 0; n < intfc->num_altsetting; ++n) { |
| 388 | if (intfc->altsetting[n].desc. | |||
| 37 | 0 | - | 389 | bAlternateSetting == j) |
| 37 | 390 | break; | ||
| 391 | } | |||
| 0 | 37 | - | 392 | if (n >= intfc->num_altsetting) |
| 393 | dev_warn(ddev, "config %d interface %d has no " | |||
| 0 | 0 | - | 393 | ternary-?: ( ddev ) -> driver |
| 394 | "altsetting %d\n", cfgno, inums[i], j); | |||
| 395 | } | |||
| 396 | } | |||
| 397 | ||||
| 37 | 398 | return 0; | ||
| 399 | } | |||
| 400 | ||||
| 401 | // hub-only!! ... and only exported for reset/reinit path. | |||
| 402 | // otherwise used internally on disconnect/destroy path | |||
| 14 | 1 | 403 | void usb_destroy_configuration(struct usb_device *dev) | |
| 404 | { | |||
| 405 | int c, i; | |||
| 406 | ||||
| 13 | 1 | 407 | if (!dev->config) | |
| 13 | 408 | return; | ||
| 409 | ||||
| 1 | 0 | - | 410 | if (dev->rawdescriptors) { |
| 1 | 1 | 411 | for (i = 0; i < dev->descriptor.bNumConfigurations; i++) | |
| 412 | kfree(dev->rawdescriptors[i]); | |||
| 413 | ||||
| 414 | kfree(dev->rawdescriptors); | |||
| 415 | dev->rawdescriptors = NULL; | |||
| 416 | } | |||
| 417 | ||||
| 1 | 1 | 418 | for (c = 0; c < dev->descriptor.bNumConfigurations; c++) { | |
| 419 | struct usb_host_config *cf = &dev->config[c]; | |||
| 420 | ||||
| 421 | kfree(cf->string); | |||
| 1 | 1 | 422 | for (i = 0; i < cf->desc.bNumInterfaces; i++) { | |
| 1 | 0 | - | 423 | if (cf->intf_cache[i]) |
| 424 | kref_put(&cf->intf_cache[i]->ref, | |||
| 425 | usb_release_interface_cache); | |||
| 426 | } | |||
| 427 | } | |||
| 428 | kfree(dev->config); | |||
| 429 | dev->config = NULL; | |||
| 430 | } | |||
| 431 | ||||
| 432 | ||||
| 433 | // hub-only!! ... and only in reset path, or usb_new_device() | |||
| 434 | // (used by real hubs and virtual root hubs) | |||
| 37 | 0 | 435 | int usb_get_configuration(struct usb_device *dev) | |
| 436 | { | |||
| 437 | struct device *ddev = &dev->dev; | |||
| 438 | int ncfg = dev->descriptor.bNumConfigurations; | |||
| 439 | int result = -ENOMEM; | |||
| 440 | unsigned int cfgno, length; | |||
| 441 | unsigned char *buffer; | |||
| 442 | unsigned char *bigbuffer; | |||
| 443 | struct usb_config_descriptor *desc; | |||
| 444 | ||||
| 0 | 37 | - | 445 | if (ncfg > USB_MAXCONFIG) { |
| 446 | dev_warn(ddev, "too many configurations: %d, " | |||
| 0 | 0 | - | 446 | ternary-?: ( ddev ) -> driver |
| 447 | "using maximum allowed: %d\n", ncfg, USB_MAXCONFIG); | |||
| 448 | dev->descriptor.bNumConfigurations = ncfg = USB_MAXCONFIG; | |||
| 449 | } | |||
| 450 | ||||
| 0 | 37 | - | 451 | if (ncfg < 1) { |
| 452 | dev_err(ddev, "no configurations\n"); | |||
| 0 | 0 | - | 452 | ternary-?: ( ddev ) -> driver |
| 0 | - | 453 | return -EINVAL; | |
| 454 | } | |||
| 455 | ||||
| 456 | length = ncfg * sizeof(struct usb_host_config); | |||
| 457 | dev->config = kzalloc(length, GFP_KERNEL); | |||
| 0 | 37 | - | 458 | |