| User: | Jiri Slaby |
| Error type: | Invalid Pointer Dereference |
| Error type description: | A pointer which is invalid is being dereferenced |
| File location: | drivers/mtd/devices/m25p80.c |
| Line in file: | 349 |
| Project: | Linux Kernel |
| Project version: | 2.6.28 |
| Tools: |
Smatch
(1.59)
|
| Entered: | 2013-09-11 08:47:26 UTC |
319 t[1].rx_buf = buf; 320 t[1].len = len; 321 spi_message_add_tail(&t[1], &m); 322 323 /* Byte count starts at zero. */ 324 if (retlen) 325 *retlen = 0; 326 327 mutex_lock(&flash->lock); 328 329 /* Wait till previous write/erase is done. */ 330 if (wait_till_ready(flash)) { 331 /* REVISIT status return?? */ 332 mutex_unlock(&flash->lock); 333 return 1; 334 } 335 336 /* FIXME switch to OPCODE_FAST_READ. It's required for higher 337 * clocks; and at this writing, every chip this driver handles 338 * supports that opcode. 339 */ 340 341 /* Set up the write data buffer. */ 342 flash->command[0] = OPCODE_READ; 343 flash->command[1] = from >> 16; 344 flash->command[2] = from >> 8; 345 flash->command[3] = from; 346 347 spi_sync(flash->spi, &m); 348 349 *retlen = m.actual_length - CMD_SIZE - FAST_READ_DUMMY_BYTE; 350 351 mutex_unlock(&flash->lock); 352 353 return 0; 354} 355 356/* 357 * Write an address range to the flash chip. Data must be written in 358 * FLASH_PAGESIZE chunks. The address range may be any size provided 359 * it is within the physical boundaries.