diff options
| -rw-r--r-- | drivers/mtd/mtdcore.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index 28553c840d32..56cb037a1052 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -971,10 +971,14 @@ EXPORT_SYMBOL_GPL(__put_mtd_device); */ int mtd_erase(struct mtd_info *mtd, struct erase_info *instr) { + if (!mtd->erasesize || !mtd->_erase) + return -ENOTSUPP; + if (instr->addr >= mtd->size || instr->len > mtd->size - instr->addr) return -EINVAL; if (!(mtd->flags & MTD_WRITEABLE)) return -EROFS; + instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN; if (!instr->len) { instr->state = MTD_ERASE_DONE; |