# Re: \[PATCH 1/5\] mtd: Initialize -\>fail\_addr early in mtd\_erase()

- From: Richard Weinberger \<richard@nod.at\>
- Date: 2018-02-12 21:53:38 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2018/02/9501985
- Thread: https://ratatoskr.run/linuxppc-dev/2018/02/9501994/t.md

```text
Am Montag, 12. Februar 2018, 22:03:07 CET schrieb Boris Brezillon:
> mtd_erase() can return an error before ->fail_addr is initialized to
> MTD_FAIL_ADDR_UNKNOWN. Move this initialization at the very beginning
> of the function.
> 
> Signed-off-by: Boris Brezillon <redacted>
> ---
>  drivers/mtd/mtdcore.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/mtdcore.c b/drivers/mtd/mtdcore.c
> index a1c94526fb88..c87859ff338b 100644
> --- a/drivers/mtd/mtdcore.c
> +++ b/drivers/mtd/mtdcore.c
> @@ -953,6 +953,8 @@ EXPORT_SYMBOL_GPL(__put_mtd_device);
>   */
>  int mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
>  {
> +	instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
> +
>  	if (!mtd->erasesize || !mtd->_erase)
>  		return -ENOTSUPP;
> 
> @@ -961,7 +963,6 @@ int mtd_erase(struct mtd_info *mtd, struct erase_info
> *instr) if (!(mtd->flags & MTD_WRITEABLE))
>  		return -EROFS;
> 
> -	instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
>  	if (!instr->len) {
>  		instr->state = MTD_ERASE_DONE;
>  		mtd_erase_callback(instr);

Reviewed-by: Richard Weinberger <richard@nod.at>

Thanks,
//richard
```