Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006-2007 Nokia Corporation |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU General Public License version 2 as published by |
| 6 | * the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 11 | * more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License along with |
| 14 | * this program; see the file COPYING. If not, write to the Free Software |
| 15 | * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 16 | * |
| 17 | * Test sub-page read and write on MTD device. |
| 18 | * Author: Adrian Hunter <ext-adrian.hunter@nokia.com> |
| 19 | * |
| 20 | */ |
| 21 | |
| 22 | #include <linux/init.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/moduleparam.h> |
| 25 | #include <linux/err.h> |
| 26 | #include <linux/mtd/mtd.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 27 | #include <linux/slab.h> |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 28 | #include <linux/sched.h> |
| 29 | |
| 30 | #define PRINT_PREF KERN_INFO "mtd_subpagetest: " |
| 31 | |
Wolfram Sang | 7406060 | 2011-10-30 00:11:53 +0200 | [diff] [blame] | 32 | static int dev = -EINVAL; |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 33 | module_param(dev, int, S_IRUGO); |
| 34 | MODULE_PARM_DESC(dev, "MTD device number to use"); |
| 35 | |
| 36 | static struct mtd_info *mtd; |
| 37 | static unsigned char *writebuf; |
| 38 | static unsigned char *readbuf; |
| 39 | static unsigned char *bbt; |
| 40 | |
| 41 | static int subpgsize; |
| 42 | static int bufsize; |
| 43 | static int ebcnt; |
| 44 | static int pgcnt; |
| 45 | static int errcnt; |
| 46 | static unsigned long next = 1; |
| 47 | |
| 48 | static inline unsigned int simple_rand(void) |
| 49 | { |
| 50 | next = next * 1103515245 + 12345; |
| 51 | return (unsigned int)((next / 65536) % 32768); |
| 52 | } |
| 53 | |
| 54 | static inline void simple_srand(unsigned long seed) |
| 55 | { |
| 56 | next = seed; |
| 57 | } |
| 58 | |
| 59 | static void set_random_data(unsigned char *buf, size_t len) |
| 60 | { |
| 61 | size_t i; |
| 62 | |
| 63 | for (i = 0; i < len; ++i) |
| 64 | buf[i] = simple_rand(); |
| 65 | } |
| 66 | |
| 67 | static inline void clear_data(unsigned char *buf, size_t len) |
| 68 | { |
| 69 | memset(buf, 0, len); |
| 70 | } |
| 71 | |
| 72 | static int erase_eraseblock(int ebnum) |
| 73 | { |
| 74 | int err; |
| 75 | struct erase_info ei; |
| 76 | loff_t addr = ebnum * mtd->erasesize; |
| 77 | |
| 78 | memset(&ei, 0, sizeof(struct erase_info)); |
| 79 | ei.mtd = mtd; |
| 80 | ei.addr = addr; |
| 81 | ei.len = mtd->erasesize; |
| 82 | |
Artem Bityutskiy | 7e1f0dc | 2011-12-23 15:25:39 +0200 | [diff] [blame^] | 83 | err = mtd_erase(mtd, &ei); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 84 | if (err) { |
| 85 | printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum); |
| 86 | return err; |
| 87 | } |
| 88 | |
| 89 | if (ei.state == MTD_ERASE_FAILED) { |
| 90 | printk(PRINT_PREF "some erase error occurred at EB %d\n", |
| 91 | ebnum); |
| 92 | return -EIO; |
| 93 | } |
| 94 | |
| 95 | return 0; |
| 96 | } |
| 97 | |
| 98 | static int erase_whole_device(void) |
| 99 | { |
| 100 | int err; |
| 101 | unsigned int i; |
| 102 | |
| 103 | printk(PRINT_PREF "erasing whole device\n"); |
| 104 | for (i = 0; i < ebcnt; ++i) { |
| 105 | if (bbt[i]) |
| 106 | continue; |
| 107 | err = erase_eraseblock(i); |
| 108 | if (err) |
| 109 | return err; |
| 110 | cond_resched(); |
| 111 | } |
| 112 | printk(PRINT_PREF "erased %u eraseblocks\n", i); |
| 113 | return 0; |
| 114 | } |
| 115 | |
| 116 | static int write_eraseblock(int ebnum) |
| 117 | { |
| 118 | size_t written = 0; |
| 119 | int err = 0; |
| 120 | loff_t addr = ebnum * mtd->erasesize; |
| 121 | |
| 122 | set_random_data(writebuf, subpgsize); |
| 123 | err = mtd->write(mtd, addr, subpgsize, &written, writebuf); |
| 124 | if (unlikely(err || written != subpgsize)) { |
| 125 | printk(PRINT_PREF "error: write failed at %#llx\n", |
| 126 | (long long)addr); |
| 127 | if (written != subpgsize) { |
| 128 | printk(PRINT_PREF " write size: %#x\n", subpgsize); |
David Woodhouse | 647b0d3 | 2009-01-05 16:31:03 +0000 | [diff] [blame] | 129 | printk(PRINT_PREF " written: %#zx\n", written); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 130 | } |
| 131 | return err ? err : -1; |
| 132 | } |
| 133 | |
| 134 | addr += subpgsize; |
| 135 | |
| 136 | set_random_data(writebuf, subpgsize); |
| 137 | err = mtd->write(mtd, addr, subpgsize, &written, writebuf); |
| 138 | if (unlikely(err || written != subpgsize)) { |
| 139 | printk(PRINT_PREF "error: write failed at %#llx\n", |
| 140 | (long long)addr); |
| 141 | if (written != subpgsize) { |
| 142 | printk(PRINT_PREF " write size: %#x\n", subpgsize); |
David Woodhouse | 647b0d3 | 2009-01-05 16:31:03 +0000 | [diff] [blame] | 143 | printk(PRINT_PREF " written: %#zx\n", written); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 144 | } |
| 145 | return err ? err : -1; |
| 146 | } |
| 147 | |
| 148 | return err; |
| 149 | } |
| 150 | |
| 151 | static int write_eraseblock2(int ebnum) |
| 152 | { |
| 153 | size_t written = 0; |
| 154 | int err = 0, k; |
| 155 | loff_t addr = ebnum * mtd->erasesize; |
| 156 | |
| 157 | for (k = 1; k < 33; ++k) { |
| 158 | if (addr + (subpgsize * k) > (ebnum + 1) * mtd->erasesize) |
| 159 | break; |
| 160 | set_random_data(writebuf, subpgsize * k); |
| 161 | err = mtd->write(mtd, addr, subpgsize * k, &written, writebuf); |
| 162 | if (unlikely(err || written != subpgsize * k)) { |
| 163 | printk(PRINT_PREF "error: write failed at %#llx\n", |
| 164 | (long long)addr); |
| 165 | if (written != subpgsize) { |
| 166 | printk(PRINT_PREF " write size: %#x\n", |
| 167 | subpgsize * k); |
David Woodhouse | 647b0d3 | 2009-01-05 16:31:03 +0000 | [diff] [blame] | 168 | printk(PRINT_PREF " written: %#08zx\n", |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 169 | written); |
| 170 | } |
| 171 | return err ? err : -1; |
| 172 | } |
| 173 | addr += subpgsize * k; |
| 174 | } |
| 175 | |
| 176 | return err; |
| 177 | } |
| 178 | |
| 179 | static void print_subpage(unsigned char *p) |
| 180 | { |
| 181 | int i, j; |
| 182 | |
| 183 | for (i = 0; i < subpgsize; ) { |
| 184 | for (j = 0; i < subpgsize && j < 32; ++i, ++j) |
| 185 | printk("%02x", *p++); |
| 186 | printk("\n"); |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | static int verify_eraseblock(int ebnum) |
| 191 | { |
| 192 | size_t read = 0; |
| 193 | int err = 0; |
| 194 | loff_t addr = ebnum * mtd->erasesize; |
| 195 | |
| 196 | set_random_data(writebuf, subpgsize); |
| 197 | clear_data(readbuf, subpgsize); |
| 198 | read = 0; |
| 199 | err = mtd->read(mtd, addr, subpgsize, &read, readbuf); |
| 200 | if (unlikely(err || read != subpgsize)) { |
Brian Norris | d57f4054 | 2011-09-20 18:34:25 -0700 | [diff] [blame] | 201 | if (mtd_is_bitflip(err) && read == subpgsize) { |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 202 | printk(PRINT_PREF "ECC correction at %#llx\n", |
| 203 | (long long)addr); |
| 204 | err = 0; |
| 205 | } else { |
| 206 | printk(PRINT_PREF "error: read failed at %#llx\n", |
| 207 | (long long)addr); |
| 208 | return err ? err : -1; |
| 209 | } |
| 210 | } |
| 211 | if (unlikely(memcmp(readbuf, writebuf, subpgsize))) { |
| 212 | printk(PRINT_PREF "error: verify failed at %#llx\n", |
| 213 | (long long)addr); |
| 214 | printk(PRINT_PREF "------------- written----------------\n"); |
| 215 | print_subpage(writebuf); |
| 216 | printk(PRINT_PREF "------------- read ------------------\n"); |
| 217 | print_subpage(readbuf); |
| 218 | printk(PRINT_PREF "-------------------------------------\n"); |
| 219 | errcnt += 1; |
| 220 | } |
| 221 | |
| 222 | addr += subpgsize; |
| 223 | |
| 224 | set_random_data(writebuf, subpgsize); |
| 225 | clear_data(readbuf, subpgsize); |
| 226 | read = 0; |
| 227 | err = mtd->read(mtd, addr, subpgsize, &read, readbuf); |
| 228 | if (unlikely(err || read != subpgsize)) { |
Brian Norris | d57f4054 | 2011-09-20 18:34:25 -0700 | [diff] [blame] | 229 | if (mtd_is_bitflip(err) && read == subpgsize) { |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 230 | printk(PRINT_PREF "ECC correction at %#llx\n", |
| 231 | (long long)addr); |
| 232 | err = 0; |
| 233 | } else { |
| 234 | printk(PRINT_PREF "error: read failed at %#llx\n", |
| 235 | (long long)addr); |
| 236 | return err ? err : -1; |
| 237 | } |
| 238 | } |
| 239 | if (unlikely(memcmp(readbuf, writebuf, subpgsize))) { |
| 240 | printk(PRINT_PREF "error: verify failed at %#llx\n", |
| 241 | (long long)addr); |
| 242 | printk(PRINT_PREF "------------- written----------------\n"); |
| 243 | print_subpage(writebuf); |
| 244 | printk(PRINT_PREF "------------- read ------------------\n"); |
| 245 | print_subpage(readbuf); |
| 246 | printk(PRINT_PREF "-------------------------------------\n"); |
| 247 | errcnt += 1; |
| 248 | } |
| 249 | |
| 250 | return err; |
| 251 | } |
| 252 | |
| 253 | static int verify_eraseblock2(int ebnum) |
| 254 | { |
| 255 | size_t read = 0; |
| 256 | int err = 0, k; |
| 257 | loff_t addr = ebnum * mtd->erasesize; |
| 258 | |
| 259 | for (k = 1; k < 33; ++k) { |
| 260 | if (addr + (subpgsize * k) > (ebnum + 1) * mtd->erasesize) |
| 261 | break; |
| 262 | set_random_data(writebuf, subpgsize * k); |
| 263 | clear_data(readbuf, subpgsize * k); |
| 264 | read = 0; |
| 265 | err = mtd->read(mtd, addr, subpgsize * k, &read, readbuf); |
| 266 | if (unlikely(err || read != subpgsize * k)) { |
Brian Norris | d57f4054 | 2011-09-20 18:34:25 -0700 | [diff] [blame] | 267 | if (mtd_is_bitflip(err) && read == subpgsize * k) { |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 268 | printk(PRINT_PREF "ECC correction at %#llx\n", |
| 269 | (long long)addr); |
| 270 | err = 0; |
| 271 | } else { |
| 272 | printk(PRINT_PREF "error: read failed at " |
| 273 | "%#llx\n", (long long)addr); |
| 274 | return err ? err : -1; |
| 275 | } |
| 276 | } |
| 277 | if (unlikely(memcmp(readbuf, writebuf, subpgsize * k))) { |
| 278 | printk(PRINT_PREF "error: verify failed at %#llx\n", |
| 279 | (long long)addr); |
| 280 | errcnt += 1; |
| 281 | } |
| 282 | addr += subpgsize * k; |
| 283 | } |
| 284 | |
| 285 | return err; |
| 286 | } |
| 287 | |
| 288 | static int verify_eraseblock_ff(int ebnum) |
| 289 | { |
| 290 | uint32_t j; |
| 291 | size_t read = 0; |
| 292 | int err = 0; |
| 293 | loff_t addr = ebnum * mtd->erasesize; |
| 294 | |
| 295 | memset(writebuf, 0xff, subpgsize); |
| 296 | for (j = 0; j < mtd->erasesize / subpgsize; ++j) { |
| 297 | clear_data(readbuf, subpgsize); |
| 298 | read = 0; |
| 299 | err = mtd->read(mtd, addr, subpgsize, &read, readbuf); |
| 300 | if (unlikely(err || read != subpgsize)) { |
Brian Norris | d57f4054 | 2011-09-20 18:34:25 -0700 | [diff] [blame] | 301 | if (mtd_is_bitflip(err) && read == subpgsize) { |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 302 | printk(PRINT_PREF "ECC correction at %#llx\n", |
| 303 | (long long)addr); |
| 304 | err = 0; |
| 305 | } else { |
| 306 | printk(PRINT_PREF "error: read failed at " |
| 307 | "%#llx\n", (long long)addr); |
| 308 | return err ? err : -1; |
| 309 | } |
| 310 | } |
| 311 | if (unlikely(memcmp(readbuf, writebuf, subpgsize))) { |
| 312 | printk(PRINT_PREF "error: verify 0xff failed at " |
| 313 | "%#llx\n", (long long)addr); |
| 314 | errcnt += 1; |
| 315 | } |
| 316 | addr += subpgsize; |
| 317 | } |
| 318 | |
| 319 | return err; |
| 320 | } |
| 321 | |
| 322 | static int verify_all_eraseblocks_ff(void) |
| 323 | { |
| 324 | int err; |
| 325 | unsigned int i; |
| 326 | |
| 327 | printk(PRINT_PREF "verifying all eraseblocks for 0xff\n"); |
| 328 | for (i = 0; i < ebcnt; ++i) { |
| 329 | if (bbt[i]) |
| 330 | continue; |
| 331 | err = verify_eraseblock_ff(i); |
| 332 | if (err) |
| 333 | return err; |
| 334 | if (i % 256 == 0) |
| 335 | printk(PRINT_PREF "verified up to eraseblock %u\n", i); |
| 336 | cond_resched(); |
| 337 | } |
| 338 | printk(PRINT_PREF "verified %u eraseblocks\n", i); |
| 339 | return 0; |
| 340 | } |
| 341 | |
| 342 | static int is_block_bad(int ebnum) |
| 343 | { |
| 344 | loff_t addr = ebnum * mtd->erasesize; |
| 345 | int ret; |
| 346 | |
| 347 | ret = mtd->block_isbad(mtd, addr); |
| 348 | if (ret) |
| 349 | printk(PRINT_PREF "block %d is bad\n", ebnum); |
| 350 | return ret; |
| 351 | } |
| 352 | |
| 353 | static int scan_for_bad_eraseblocks(void) |
| 354 | { |
| 355 | int i, bad = 0; |
| 356 | |
Julia Lawall | 2bfefa4 | 2010-05-13 22:03:15 +0200 | [diff] [blame] | 357 | bbt = kzalloc(ebcnt, GFP_KERNEL); |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 358 | if (!bbt) { |
| 359 | printk(PRINT_PREF "error: cannot allocate memory\n"); |
| 360 | return -ENOMEM; |
| 361 | } |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 362 | |
| 363 | printk(PRINT_PREF "scanning for bad eraseblocks\n"); |
| 364 | for (i = 0; i < ebcnt; ++i) { |
| 365 | bbt[i] = is_block_bad(i) ? 1 : 0; |
| 366 | if (bbt[i]) |
| 367 | bad += 1; |
| 368 | cond_resched(); |
| 369 | } |
| 370 | printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad); |
| 371 | return 0; |
| 372 | } |
| 373 | |
| 374 | static int __init mtd_subpagetest_init(void) |
| 375 | { |
| 376 | int err = 0; |
| 377 | uint32_t i; |
| 378 | uint64_t tmp; |
| 379 | |
| 380 | printk(KERN_INFO "\n"); |
| 381 | printk(KERN_INFO "=================================================\n"); |
Wolfram Sang | 7406060 | 2011-10-30 00:11:53 +0200 | [diff] [blame] | 382 | |
| 383 | if (dev < 0) { |
| 384 | printk(PRINT_PREF "Please specify a valid mtd-device via module paramter\n"); |
| 385 | printk(KERN_CRIT "CAREFUL: This test wipes all data on the specified MTD device!\n"); |
| 386 | return -EINVAL; |
| 387 | } |
| 388 | |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 389 | printk(PRINT_PREF "MTD device: %d\n", dev); |
| 390 | |
| 391 | mtd = get_mtd_device(NULL, dev); |
| 392 | if (IS_ERR(mtd)) { |
| 393 | err = PTR_ERR(mtd); |
| 394 | printk(PRINT_PREF "error: cannot get MTD device\n"); |
| 395 | return err; |
| 396 | } |
| 397 | |
| 398 | if (mtd->type != MTD_NANDFLASH) { |
| 399 | printk(PRINT_PREF "this test requires NAND flash\n"); |
| 400 | goto out; |
| 401 | } |
| 402 | |
| 403 | subpgsize = mtd->writesize >> mtd->subpage_sft; |
Roman Tereshonkov | 7b7e905 | 2011-02-03 13:45:56 +0200 | [diff] [blame] | 404 | tmp = mtd->size; |
| 405 | do_div(tmp, mtd->erasesize); |
| 406 | ebcnt = tmp; |
| 407 | pgcnt = mtd->erasesize / mtd->writesize; |
| 408 | |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 409 | printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, " |
| 410 | "page size %u, subpage size %u, count of eraseblocks %u, " |
| 411 | "pages per eraseblock %u, OOB size %u\n", |
| 412 | (unsigned long long)mtd->size, mtd->erasesize, |
| 413 | mtd->writesize, subpgsize, ebcnt, pgcnt, mtd->oobsize); |
| 414 | |
| 415 | err = -ENOMEM; |
| 416 | bufsize = subpgsize * 32; |
| 417 | writebuf = kmalloc(bufsize, GFP_KERNEL); |
| 418 | if (!writebuf) { |
| 419 | printk(PRINT_PREF "error: cannot allocate memory\n"); |
| 420 | goto out; |
| 421 | } |
| 422 | readbuf = kmalloc(bufsize, GFP_KERNEL); |
| 423 | if (!readbuf) { |
| 424 | printk(PRINT_PREF "error: cannot allocate memory\n"); |
| 425 | goto out; |
| 426 | } |
| 427 | |
Artem Bityutskiy | bf60862 | 2008-12-08 13:37:48 +0200 | [diff] [blame] | 428 | err = scan_for_bad_eraseblocks(); |
| 429 | if (err) |
| 430 | goto out; |
| 431 | |
| 432 | err = erase_whole_device(); |
| 433 | if (err) |
| 434 | goto out; |
| 435 | |
| 436 | printk(PRINT_PREF "writing whole device\n"); |
| 437 | simple_srand(1); |
| 438 | for (i = 0; i < ebcnt; ++i) { |
| 439 | if (bbt[i]) |
| 440 | continue; |
| 441 | err = write_eraseblock(i); |
| 442 | if (unlikely(err)) |
| 443 | goto out; |
| 444 | if (i % 256 == 0) |
| 445 | printk(PRINT_PREF "written up to eraseblock %u\n", i); |
| 446 | cond_resched(); |
| 447 | } |
| 448 | printk(PRINT_PREF "written %u eraseblocks\n", i); |
| 449 | |
| 450 | simple_srand(1); |
| 451 | printk(PRINT_PREF "verifying all eraseblocks\n"); |
| 452 | for (i = 0; i < ebcnt; ++i) { |
| 453 | if (bbt[i]) |
| 454 | continue; |
| 455 | err = verify_eraseblock(i); |
| 456 | if (unlikely(err)) |
| 457 | goto out; |
| 458 | if (i % 256 == 0) |
| 459 | printk(PRINT_PREF "verified up to eraseblock %u\n", i); |
| 460 | cond_resched(); |
| 461 | } |
| 462 | printk(PRINT_PREF "verified %u eraseblocks\n", i); |
| 463 | |
| 464 | err = erase_whole_device(); |
| 465 | if (err) |
| 466 | goto out; |
| 467 | |
| 468 | err = verify_all_eraseblocks_ff(); |
| 469 | if (err) |
| 470 | goto out; |
| 471 | |
| 472 | /* Write all eraseblocks */ |
| 473 | simple_srand(3); |
| 474 | printk(PRINT_PREF "writing whole device\n"); |
| 475 | for (i = 0; i < ebcnt; ++i) { |
| 476 | if (bbt[i]) |
| 477 | continue; |
| 478 | err = write_eraseblock2(i); |
| 479 | if (unlikely(err)) |
| 480 | goto out; |
| 481 | if (i % 256 == 0) |
| 482 | printk(PRINT_PREF "written up to eraseblock %u\n", i); |
| 483 | cond_resched(); |
| 484 | } |
| 485 | printk(PRINT_PREF "written %u eraseblocks\n", i); |
| 486 | |
| 487 | /* Check all eraseblocks */ |
| 488 | simple_srand(3); |
| 489 | printk(PRINT_PREF "verifying all eraseblocks\n"); |
| 490 | for (i = 0; i < ebcnt; ++i) { |
| 491 | if (bbt[i]) |
| 492 | continue; |
| 493 | err = verify_eraseblock2(i); |
| 494 | if (unlikely(err)) |
| 495 | goto out; |
| 496 | if (i % 256 == 0) |
| 497 | printk(PRINT_PREF "verified up to eraseblock %u\n", i); |
| 498 | cond_resched(); |
| 499 | } |
| 500 | printk(PRINT_PREF "verified %u eraseblocks\n", i); |
| 501 | |
| 502 | err = erase_whole_device(); |
| 503 | if (err) |
| 504 | goto out; |
| 505 | |
| 506 | err = verify_all_eraseblocks_ff(); |
| 507 | if (err) |
| 508 | goto out; |
| 509 | |
| 510 | printk(PRINT_PREF "finished with %d errors\n", errcnt); |
| 511 | |
| 512 | out: |
| 513 | kfree(bbt); |
| 514 | kfree(readbuf); |
| 515 | kfree(writebuf); |
| 516 | put_mtd_device(mtd); |
| 517 | if (err) |
| 518 | printk(PRINT_PREF "error %d occurred\n", err); |
| 519 | printk(KERN_INFO "=================================================\n"); |
| 520 | return err; |
| 521 | } |
| 522 | module_init(mtd_subpagetest_init); |
| 523 | |
| 524 | static void __exit mtd_subpagetest_exit(void) |
| 525 | { |
| 526 | return; |
| 527 | } |
| 528 | module_exit(mtd_subpagetest_exit); |
| 529 | |
| 530 | MODULE_DESCRIPTION("Subpage test module"); |
| 531 | MODULE_AUTHOR("Adrian Hunter"); |
| 532 | MODULE_LICENSE("GPL"); |