drivers/mtd/mtdpart.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Simple MTD partitioning layer
   4  *
   5  * Copyright © 2000 Nicolas Pitre <nico@fluxnic.net>
   6  * Copyright © 2002 Thomas Gleixner <gleixner@linutronix.de>
   7  * Copyright © 2000-2010 David Woodhouse <dwmw2@infradead.org>
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/types.h>
  12 #include <linux/kernel.h>
  13 #include <linux/slab.h>
  14 #include <linux/list.h>
  15 #include <linux/kmod.h>
  16 #include <linux/mtd/mtd.h>
  17 #include <linux/mtd/partitions.h>
  18 #include <linux/err.h>
  19 #include <linux/of.h>
  20
  21 #include "mtdcore.h"
  22
  23 /*
  24  * MTD methods which simply translate the effective address and pass through
  25  * to the _real_ device.
  26  */
  27
  28 static inline void free_partition(struct mtd_info *mtd)
  29 {
  30         kfree(mtd->name);
  31         kfree(mtd);
  32 }
  33
  34 static struct mtd_info *allocate_partition(struct mtd_info *parent,
  35                                            const struct mtd_partition *part,
  36                                            int partno, uint64_t cur_offset)
  37 {
  38         int wr_alignment = (parent->flags & MTD_NO_ERASE) ? parent->writesize :
  39                                                             parent->erasesize;
  40         struct mtd_info *child, *master = mtd_get_master(parent);
  41         u32 remainder;
  42         char *name;
  43         u64 tmp;
  44
  45         /* allocate the partition structure */
  46         child = kzalloc(sizeof(*child), GFP_KERNEL);
  47         name = kstrdup(part->name, GFP_KERNEL);
  48         if (!name || !child) {
  49                 printk(KERN_ERR"memory allocation error while creating partitions for \"%s\"\n",
  50                        parent->name);
  51                 kfree(name);
  52                 kfree(child);
  53                 return ERR_PTR(-ENOMEM);
  54         }
  55
  56         /* set up the MTD object for this partition */
  57         child->type = parent->type;
  58         child->part.flags = parent->flags & ~part->mask_flags;
  59         child->flags = child->part.flags;
  60         child->size = part->size;
  61         child->writesize = parent->writesize;
  62         child->writebufsize = parent->writebufsize;
  63         child->oobsize = parent->oobsize;
  64         child->oobavail = parent->oobavail;
  65         child->subpage_sft = parent->subpage_sft;
  66
  67         child->name = name;
  68         child->owner = parent->owner;
  69
  70         /* NOTE: Historically, we didn't arrange MTDs as a tree out of
  71          * concern for showing the same data in multiple partitions.
  72          * However, it is very useful to have the master node present,
  73          * so the MTD_PARTITIONED_MASTER option allows that. The master
  74          * will have device nodes etc only if this is set, so make the
  75          * parent conditional on that option. Note, this is a way to
  76          * distinguish between the parent and its partitions in sysfs.
  77          */
  78         child->dev.parent = IS_ENABLED(CONFIG_MTD_PARTITIONED_MASTER) || mtd_is_partition(parent) ?
  79                             &parent->dev : parent->dev.parent;
  80         child->dev.of_node = part->of_node;
  81         child->parent = parent;
  82         child->part.offset = part->offset;
  83         INIT_LIST_HEAD(&child->partitions);
  84
  85         if (child->part.offset == MTDPART_OFS_APPEND)
  86                 child->part.offset = cur_offset;
  87         if (child->part.offset == MTDPART_OFS_NXTBLK) {
  88                 tmp = cur_offset;
  89                 child->part.offset = cur_offset;
  90                 remainder = do_div(tmp, wr_alignment);
  91                 if (remainder) {
  92                         child->part.offset += wr_alignment - remainder;
  93                         printk(KERN_NOTICE "Moving partition %d: "
  94                                "0x%012llx -> 0x%012llx\n", partno,
  95                                (unsigned long long)cur_offset,
  96                                child->part.offset);
  97                 }
  98         }
  99         if (child->part.offset == MTDPART_OFS_RETAIN) {
 100                 child->part.offset = cur_offset;
 101                 if (parent->size - child->part.offset >= child->size) {
 102                         child->size = parent->size - child->part.offset -
 103                                       child->size;
 104                 } else {
 105                         printk(KERN_ERR "mtd partition \"%s\" doesn't have enough space: %#llx < %#llx, disabled\n",
 106                                 part->name, parent->size - child->part.offset,
 107                                 child->size);
 108                         /* register to preserve ordering */
 109                         goto out_register;
 110                 }
 111         }
 112         if (child->size == MTDPART_SIZ_FULL)
 113                 child->size = parent->size - child->part.offset;
 114
 115         printk(KERN_NOTICE "0x%012llx-0x%012llx : \"%s\"\n",
 116                child->part.offset, child->part.offset + child->size,
 117                child->name);
 118
 119         /* let's do some sanity checks */
 120         if (child->part.offset >= parent->size) {
 121                 /* let's register it anyway to preserve ordering */
 122                 child->part.offset = 0;
 123                 child->size = 0;
 124
 125                 /* Initialize ->erasesize to make add_mtd_device() happy. */
 126                 child->erasesize = parent->erasesize;
 127                 printk(KERN_ERR"mtd: partition \"%s\" is out of reach -- disabled\n",
 128                         part->name);
 129                 goto out_register;
 130         }
 131         if (child->part.offset + child->size > parent->size) {
 132                 child->size = parent->size - child->part.offset;
 133                 printk(KERN_WARNING"mtd: partition \"%s\" extends beyond the end of device \"%s\" -- size truncated to %#llx\n",
 134                         part->name, parent->name, child->size);
 135         }
 136         if (parent->numeraseregions > 1) {
 137                 /* Deal with variable erase size stuff */
 138                 int i, max = parent->numeraseregions;
 139                 u64 end = child->part.offset + child->size;
 140                 struct mtd_erase_region_info *regions = parent->eraseregions;
 141
 142                 /* Find the first erase regions which is part of this
 143                  * partition. */
 144                 for (i = 0; i < max && regions[i].offset <= child->part.offset;
 145                      i++)
 146                         ;
 147                 /* The loop searched for the region _behind_ the first one */
 148                 if (i > 0)
 149                         i--;
 150
 151                 /* Pick biggest erasesize */
 152                 for (; i < max && regions[i].offset < end; i++) {
 153                         if (child->erasesize < regions[i].erasesize)
 154                                 child->erasesize = regions[i].erasesize;
 155                 }
 156                 BUG_ON(child->erasesize == 0);
 157         } else {
 158                 /* Single erase size */
 159                 child->erasesize = parent->erasesize;
 160         }
 161
 162         /*
 163          * Child erasesize might differ from the parent one if the parent
 164          * exposes several regions with different erasesize. Adjust
 165          * wr_alignment accordingly.
 166          */
 167         if (!(child->flags & MTD_NO_ERASE))
 168                 wr_alignment = child->erasesize;
 169
 170         tmp = mtd_get_master_ofs(child, 0);
 171         remainder = do_div(tmp, wr_alignment);
 172         if ((child->flags & MTD_WRITEABLE) && remainder) {
 173                 /* Doesn't start on a boundary of major erase size */
 174                 /* FIXME: Let it be writable if it is on a boundary of
 175                  * _minor_ erase size though */
 176                 child->flags &= ~MTD_WRITEABLE;
 177                 printk(KERN_WARNING"mtd: partition \"%s\" doesn't start on an erase/write block boundary -- force read-only\n",
 178                         part->name);
 179         }
 180
 181         tmp = mtd_get_master_ofs(child, 0) + child->size;
 182         remainder = do_div(tmp, wr_alignment);
 183         if ((child->flags & MTD_WRITEABLE) && remainder) {
 184                 child->flags &= ~MTD_WRITEABLE;
 185                 printk(KERN_WARNING"mtd: partition \"%s\" doesn't end on an erase/write block -- force read-only\n",
 186                         part->name);
 187         }
 188
 189         child->ecc_step_size = parent->ecc_step_size;
 190         child->ecc_strength = parent->ecc_strength;
 191         child->bitflip_threshold = parent->bitflip_threshold;
 192
 193         if (master->_block_isbad) {
 194                 uint64_t offs = 0;
 195
 196                 while (offs < child->size) {
 197                         if (mtd_block_isreserved(child, offs))
 198                                 child->ecc_stats.bbtblocks++;
 199                         else if (mtd_block_isbad(child, offs))
 200                                 child->ecc_stats.badblocks++;
 201                         offs += child->erasesize;
 202                 }
 203         }
 204
 205 out_register:
 206         return child;
 207 }
 208
 209 static ssize_t mtd_partition_offset_show(struct device *dev,
 210                 struct device_attribute *attr, char *buf)
 211 {
 212         struct mtd_info *mtd = dev_get_drvdata(dev);
 213
 214         return snprintf(buf, PAGE_SIZE, "%lld\n", mtd->part.offset);
 215 }
 216
 217 static DEVICE_ATTR(offset, S_IRUGO, mtd_partition_offset_show, NULL);
 218
 219 static const struct attribute *mtd_partition_attrs[] = {
 220         &dev_attr_offset.attr,
 221         NULL
 222 };
 223
 224 static int mtd_add_partition_attrs(struct mtd_info *new)
 225 {
 226         int ret = sysfs_create_files(&new->dev.kobj, mtd_partition_attrs);
 227         if (ret)
 228                 printk(KERN_WARNING
 229                        "mtd: failed to create partition attrs, err=%d\n", ret);
 230         return ret;
 231 }
 232
 233 int mtd_add_partition(struct mtd_info *parent, const char *name,
 234                       long long offset, long long length)
 235 {
 236         struct mtd_info *master = mtd_get_master(parent);
 237         struct mtd_partition part;
 238         struct mtd_info *child;
 239         int ret = 0;
 240
 241         /* the direct offset is expected */
 242         if (offset == MTDPART_OFS_APPEND ||
 243             offset == MTDPART_OFS_NXTBLK)
 244                 return -EINVAL;
 245
 246         if (length == MTDPART_SIZ_FULL)
 247                 length = parent->size - offset;
 248
 249         if (length <= 0)
 250                 return -EINVAL;
 251
 252         memset(&part, 0, sizeof(part));
 253         part.name = name;
 254         part.size = length;
 255         part.offset = offset;
 256
 257         child = allocate_partition(parent, &part, -1, offset);
 258         if (IS_ERR(child))
 259                 return PTR_ERR(child);
 260
 261         mutex_lock(&master->master.partitions_lock);
 262         list_add_tail(&child->part.node, &parent->partitions);
 263         mutex_unlock(&master->master.partitions_lock);
 264
 265         ret = add_mtd_device(child);
 266         if (ret)
 267                 goto err_remove_part;
 268
 269         mtd_add_partition_attrs(child);
 270
 271         return 0;
 272
 273 err_remove_part:
 274         mutex_lock(&master->master.partitions_lock);
 275         list_del(&child->part.node);
 276         mutex_unlock(&master->master.partitions_lock);
 277
 278         free_partition(child);
 279
 280         return ret;
 281 }
 282 EXPORT_SYMBOL_GPL(mtd_add_partition);
 283
 284 /**
 285  * __mtd_del_partition - delete MTD partition
 286  *
 287  * @priv: MTD structure to be deleted
 288  *
 289  * This function must be called with the partitions mutex locked.
 290  */
 291 static int __mtd_del_partition(struct mtd_info *mtd)
 292 {
 293         struct mtd_info *child, *next;
 294         int err;
 295
 296         list_for_each_entry_safe(child, next, &mtd->partitions, part.node) {
 297                 err = __mtd_del_partition(child);
 298                 if (err)
 299                         return err;
 300         }
 301
 302         sysfs_remove_files(&mtd->dev.kobj, mtd_partition_attrs);
 303
 304         err = del_mtd_device(mtd);
 305         if (err)
 306                 return err;
 307
 308         list_del(&child->part.node);
 309         free_partition(mtd);
 310
 311         return 0;
 312 }
 313
 314 /*
 315  * This function unregisters and destroy all slave MTD objects which are
 316  * attached to the given MTD object, recursively.
 317  */
 318 static int __del_mtd_partitions(struct mtd_info *mtd)
 319 {
 320         struct mtd_info *child, *next;
 321         LIST_HEAD(tmp_list);
 322         int ret, err = 0;
 323
 324         list_for_each_entry_safe(child, next, &mtd->partitions, part.node) {
 325                 if (mtd_has_partitions(child))
 326                         del_mtd_partitions(child);
 327
 328                 pr_info("Deleting %s MTD partition\n", child->name);
 329                 ret = del_mtd_device(child);
 330                 if (ret < 0) {
 331                         pr_err("Error when deleting partition \"%s\" (%d)\n",
 332                                child->name, ret);
 333                         err = ret;
 334                         continue;
 335                 }
 336
 337                 list_del(&child->part.node);
 338                 free_partition(child);
 339         }
 340
 341         return err;
 342 }
 343
 344 int del_mtd_partitions(struct mtd_info *mtd)
 345 {
 346         struct mtd_info *master = mtd_get_master(mtd);
 347         int ret;
 348
 349         pr_info("Deleting MTD partitions on \"%s\":\n", mtd->name);
 350
 351         mutex_lock(&master->master.partitions_lock);
 352         ret = __del_mtd_partitions(mtd);
 353         mutex_unlock(&master->master.partitions_lock);
 354
 355         return ret;
 356 }
 357
 358 int mtd_del_partition(struct mtd_info *mtd, int partno)
 359 {
 360         struct mtd_info *child, *master = mtd_get_master(mtd);
 361         int ret = -EINVAL;
 362
 363         mutex_lock(&master->master.partitions_lock);
 364         list_for_each_entry(child, &mtd->partitions, part.node) {
 365                 if (child->index == partno) {
 366                         ret = __mtd_del_partition(child);
 367                         break;
 368                 }
 369         }
 370         mutex_unlock(&master->master.partitions_lock);
 371
 372         return ret;
 373 }
 374 EXPORT_SYMBOL_GPL(mtd_del_partition);
 375
 376 /*
 377  * This function, given a parent MTD object and a partition table, creates
 378  * and registers the child MTD objects which are bound to the parent according
 379  * to the partition definitions.
 380  *
 381  * For historical reasons, this function's caller only registers the parent
 382  * if the MTD_PARTITIONED_MASTER config option is set.
 383  */
 384
 385 int add_mtd_partitions(struct mtd_info *parent,
 386                        const struct mtd_partition *parts,
 387                        int nbparts)
 388 {
 389         struct mtd_info *child, *master = mtd_get_master(parent);
 390         uint64_t cur_offset = 0;
 391         int i, ret;
 392
 393         printk(KERN_NOTICE "Creating %d MTD partitions on \"%s\":\n",
 394                nbparts, parent->name);
 395
 396         for (i = 0; i < nbparts; i++) {
 397                 child = allocate_partition(parent, parts + i, i, cur_offset);
 398                 if (IS_ERR(child)) {
 399                         ret = PTR_ERR(child);
 400                         goto err_del_partitions;
 401                 }
 402
 403                 mutex_lock(&master->master.partitions_lock);
 404                 list_add_tail(&child->part.node, &parent->partitions);
 405                 mutex_unlock(&master->master.partitions_lock);
 406
 407                 ret = add_mtd_device(child);
 408                 if (ret) {
 409                         mutex_lock(&master->master.partitions_lock);
 410                         list_del(&child->part.node);
 411                         mutex_unlock(&master->master.partitions_lock);
 412
 413                         free_partition(child);
 414                         goto err_del_partitions;
 415                 }
 416
 417                 mtd_add_partition_attrs(child);
 418
 419                 /* Look for subpartitions */
 420                 parse_mtd_partitions(child, parts[i].types, NULL);
 421
 422                 cur_offset = child->part.offset + child->size;
 423         }
 424
 425         return 0;
 426
 427 err_del_partitions:
 428         del_mtd_partitions(master);
 429
 430         return ret;
 431 }
 432
 433 static DEFINE_SPINLOCK(part_parser_lock);
 434 static LIST_HEAD(part_parsers);
 435
 436 static struct mtd_part_parser *mtd_part_parser_get(const char *name)
 437 {
 438         struct mtd_part_parser *p, *ret = NULL;
 439
 440         spin_lock(&part_parser_lock);
 441
 442         list_for_each_entry(p, &part_parsers, list)
 443                 if (!strcmp(p->name, name) && try_module_get(p->owner)) {
 444                         ret = p;
 445                         break;
 446                 }
 447
 448         spin_unlock(&part_parser_lock);
 449
 450         return ret;
 451 }
 452
 453 static inline void mtd_part_parser_put(const struct mtd_part_parser *p)
 454 {
 455         module_put(p->owner);
 456 }
 457
 458 /*
 459  * Many partition parsers just expected the core to kfree() all their data in
 460  * one chunk. Do that by default.
 461  */
 462 static void mtd_part_parser_cleanup_default(const struct mtd_partition *pparts,
 463                                             int nr_parts)
 464 {
 465         kfree(pparts);
 466 }
 467
 468 int __register_mtd_parser(struct mtd_part_parser *p, struct module *owner)
 469 {
 470         p->owner = owner;
 471
 472         if (!p->cleanup)
 473                 p->cleanup = &mtd_part_parser_cleanup_default;
 474
 475         spin_lock(&part_parser_lock);
 476         list_add(&p->list, &part_parsers);
 477         spin_unlock(&part_parser_lock);
 478
 479         return 0;
 480 }
 481 EXPORT_SYMBOL_GPL(__register_mtd_parser);
 482
 483 void deregister_mtd_parser(struct mtd_part_parser *p)
 484 {
 485         spin_lock(&part_parser_lock);
 486         list_del(&p->list);
 487         spin_unlock(&part_parser_lock);
 488 }
 489 EXPORT_SYMBOL_GPL(deregister_mtd_parser);
 490
 491 /*
 492  * Do not forget to update 'parse_mtd_partitions()' kerneldoc comment if you
 493  * are changing this array!
 494  */
 495 static const char * const default_mtd_part_types[] = {
 496         "cmdlinepart",
 497         "ofpart",
 498         NULL
 499 };
 500
 501 /* Check DT only when looking for subpartitions. */
 502 static const char * const default_subpartition_types[] = {
 503         "ofpart",
 504         NULL
 505 };
 506
 507 static int mtd_part_do_parse(struct mtd_part_parser *parser,
 508                              struct mtd_info *master,
 509                              struct mtd_partitions *pparts,
 510                              struct mtd_part_parser_data *data)
 511 {
 512         int ret;
 513
 514         ret = (*parser->parse_fn)(master, &pparts->parts, data);
 515         pr_debug("%s: parser %s: %i\n", master->name, parser->name, ret);
 516         if (ret <= 0)
 517                 return ret;
 518
 519         pr_notice("%d %s partitions found on MTD device %s\n", ret,
 520                   parser->name, master->name);
 521
 522         pparts->nr_parts = ret;
 523         pparts->parser = parser;
 524
 525         return ret;
 526 }
 527
 528 /**
 529  * mtd_part_get_compatible_parser - find MTD parser by a compatible string
 530  *
 531  * @compat: compatible string describing partitions in a device tree
 532  *
 533  * MTD parsers can specify supported partitions by providing a table of
 534  * compatibility strings. This function finds a parser that advertises support
 535  * for a passed value of "compatible".
 536  */
 537 static struct mtd_part_parser *mtd_part_get_compatible_parser(const char *compat)
 538 {
 539         struct mtd_part_parser *p, *ret = NULL;
 540
 541         spin_lock(&part_parser_lock);
 542
 543         list_for_each_entry(p, &part_parsers, list) {
 544                 const struct of_device_id *matches;
 545
 546                 matches = p->of_match_table;
 547                 if (!matches)
 548                         continue;
 549
 550                 for (; matches->compatible[0]; matches++) {
 551                         if (!strcmp(matches->compatible, compat) &&
 552                             try_module_get(p->owner)) {
 553                                 ret = p;
 554                                 break;
 555                         }
 556                 }
 557
 558                 if (ret)
 559                         break;
 560         }
 561
 562         spin_unlock(&part_parser_lock);
 563
 564         return ret;
 565 }
 566
 567 static int mtd_part_of_parse(struct mtd_info *master,
 568                              struct mtd_partitions *pparts)
 569 {
 570         struct mtd_part_parser *parser;
 571         struct device_node *np;
 572         struct property *prop;
 573         const char *compat;
 574         const char *fixed = "fixed-partitions";
 575         int ret, err = 0;
 576
 577         np = mtd_get_of_node(master);
 578         if (mtd_is_partition(master))
 579                 of_node_get(np);
 580         else
 581                 np = of_get_child_by_name(np, "partitions");
 582
 583         of_property_for_each_string(np, "compatible", prop, compat) {
 584                 parser = mtd_part_get_compatible_parser(compat);
 585                 if (!parser)
 586                         continue;
 587                 ret = mtd_part_do_parse(parser, master, pparts, NULL);
 588                 if (ret > 0) {
 589                         of_node_put(np);
 590                         return ret;
 591                 }
 592                 mtd_part_parser_put(parser);
 593                 if (ret < 0 && !err)
 594                         err = ret;
 595         }
 596         of_node_put(np);
 597
 598         /*
 599          * For backward compatibility we have to try the "fixed-partitions"
 600          * parser. It supports old DT format with partitions specified as a
 601          * direct subnodes of a flash device DT node without any compatibility
 602          * specified we could match.
 603          */
 604         parser = mtd_part_parser_get(fixed);
 605         if (!parser && !request_module("%s", fixed))
 606                 parser = mtd_part_parser_get(fixed);
 607         if (parser) {
 608                 ret = mtd_part_do_parse(parser, master, pparts, NULL);
 609                 if (ret > 0)
 610                         return ret;
 611                 mtd_part_parser_put(parser);
 612                 if (ret < 0 && !err)
 613                         err = ret;
 614         }
 615
 616         return err;
 617 }
 618
 619 /**
 620  * parse_mtd_partitions - parse and register MTD partitions
 621  *
 622  * @master: the master partition (describes whole MTD device)
 623  * @types: names of partition parsers to try or %NULL
 624  * @data: MTD partition parser-specific data
 625  *
 626  * This function tries to find & register partitions on MTD device @master. It
 627  * uses MTD partition parsers, specified in @types. However, if @types is %NULL,
 628  * then the default list of parsers is used. The default list contains only the
 629  * "cmdlinepart" and "ofpart" parsers ATM.
 630  * Note: If there are more then one parser in @types, the kernel only takes the
 631  * partitions parsed out by the first parser.
 632  *
 633  * This function may return:
 634  * o a negative error code in case of failure
 635  * o number of found partitions otherwise
 636  */
 637 int parse_mtd_partitions(struct mtd_info *master, const char *const *types,
 638                          struct mtd_part_parser_data *data)
 639 {
 640         struct mtd_partitions pparts = { };
 641         struct mtd_part_parser *parser;
 642         int ret, err = 0;
 643
 644         if (!types)
 645                 types = mtd_is_partition(master) ? default_subpartition_types :
 646                         default_mtd_part_types;
 647
 648         for ( ; *types; types++) {
 649                 /*
 650                  * ofpart is a special type that means OF partitioning info
 651                  * should be used. It requires a bit different logic so it is
 652                  * handled in a separated function.
 653                  */
 654                 if (!strcmp(*types, "ofpart")) {
 655                         ret = mtd_part_of_parse(master, &pparts);
 656                 } else {
 657                         pr_debug("%s: parsing partitions %s\n", master->name,
 658                                  *types);
 659                         parser = mtd_part_parser_get(*types);
 660                         if (!parser && !request_module("%s", *types))
 661                                 parser = mtd_part_parser_get(*types);
 662                         pr_debug("%s: got parser %s\n", master->name,
 663                                 parser ? parser->name : NULL);
 664                         if (!parser)
 665                                 continue;
 666                         ret = mtd_part_do_parse(parser, master, &pparts, data);
 667                         if (ret <= 0)
 668                                 mtd_part_parser_put(parser);
 669                 }
 670                 /* Found partitions! */
 671                 if (ret > 0) {
 672                         err = add_mtd_partitions(master, pparts.parts,
 673                                                  pparts.nr_parts);
 674                         mtd_part_parser_cleanup(&pparts);
 675                         return err ? err : pparts.nr_parts;
 676                 }
 677                 /*
 678                  * Stash the first error we see; only report it if no parser
 679                  * succeeds
 680                  */
 681                 if (ret < 0 && !err)
 682                         err = ret;
 683         }
 684         return err;
 685 }
 686
 687 void mtd_part_parser_cleanup(struct mtd_partitions *parts)
 688 {
 689         const struct mtd_part_parser *parser;
 690
 691         if (!parts)
 692                 return;
 693
 694         parser = parts->parser;
 695         if (parser) {
 696                 if (parser->cleanup)
 697                         parser->cleanup(parts->parts, parts->nr_parts);
 698
 699                 mtd_part_parser_put(parser);
 700         }
 701 }
 702
 703 /* Returns the size of the entire flash chip */
 704 uint64_t mtd_get_device_size(const struct mtd_info *mtd)
 705 {
 706         struct mtd_info *master = mtd_get_master((struct mtd_info *)mtd);
 707
 708         return master->size;
 709 }
 710 EXPORT_SYMBOL_GPL(mtd_get_device_size);