diff options
Diffstat (limited to 'drivers/mtd/mtdcore.c')
| -rw-r--r-- | drivers/mtd/mtdcore.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c index a9b8be9f40dc..18aa54460d36 100644 --- a/drivers/mtd/mtdcore.c +++ b/drivers/mtd/mtdcore.c @@ -1218,6 +1218,34 @@ int __get_mtd_device(struct mtd_info *mtd) EXPORT_SYMBOL_GPL(__get_mtd_device); /** + * of_get_mtd_device_by_node - obtain an MTD device associated with a given node + * + * @np: device tree node + */ +struct mtd_info *of_get_mtd_device_by_node(struct device_node *np) +{ + struct mtd_info *mtd = NULL; + struct mtd_info *tmp; + int err; + + mutex_lock(&mtd_table_mutex); + + err = -EPROBE_DEFER; + mtd_for_each_device(tmp) { + if (mtd_get_of_node(tmp) == np) { + mtd = tmp; + err = __get_mtd_device(mtd); + break; + } + } + + mutex_unlock(&mtd_table_mutex); + + return err ? ERR_PTR(err) : mtd; +} +EXPORT_SYMBOL_GPL(of_get_mtd_device_by_node); + +/** * get_mtd_device_nm - obtain a validated handle for an MTD device by * device name * @name: MTD device name to open @@ -1624,6 +1652,9 @@ int mtd_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops) if (!master->_read_oob && (!master->_read || ops->oobbuf)) return -EOPNOTSUPP; + if (ops->stats) + memset(ops->stats, 0, sizeof(*ops->stats)); + if (mtd->flags & MTD_SLC_ON_MLC_EMULATION) ret_code = mtd_io_emulated_slc(mtd, from, true, ops); else @@ -1641,6 +1672,8 @@ int mtd_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops) return ret_code; if (mtd->ecc_strength == 0) return 0; /* device lacks ecc */ + if (ops->stats) + ops->stats->max_bitflips = ret_code; return ret_code >= mtd->bitflip_threshold ? -EUCLEAN : 0; } EXPORT_SYMBOL_GPL(mtd_read_oob); |