Re: [PATCH 1/8] misc: cxl: clean up afu_read_config()

[Michael Neuling <mikey@neuling.org>]

On Mon, 2015-07-27 at 00:18 +0300, Vladimir Zapolskiy wrote:
> The sanity checks for overflow are not needed, because this is done on
> caller side in fs/sysfs/file.c
>=20
> Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
> Cc: linuxppc-dev@lists.ozlabs.org
> Cc: Ian Munsie <imunsie@au1.ibm.com>
> Cc: Michael Neuling <mikey@neuling.org>

Acked-by: Michael Neuling <mikey@neuling.org>

> ---
>  drivers/misc/cxl/sysfs.c | 7 +------
>  1 file changed, 1 insertion(+), 6 deletions(-)
>=20
> diff --git a/drivers/misc/cxl/sysfs.c b/drivers/misc/cxl/sysfs.c
> index 31f38bc..87cd747 100644
> --- a/drivers/misc/cxl/sysfs.c
> +++ b/drivers/misc/cxl/sysfs.c
> @@ -443,12 +443,7 @@ static ssize_t afu_read_config(struct file *filp, st=
ruct kobject *kobj,
>  	struct afu_config_record *cr =3D to_cr(kobj);
>  	struct cxl_afu *afu =3D to_cxl_afu(container_of(kobj->parent, struct de=
vice, kobj));
> =20
> -	u64 i, j, val, size =3D afu->crs_len;
> -
> -	if (off > size)
> -		return 0;
> -	if (off + count > size)
> -		count =3D size - off;
> +	u64 i, j, val;
> =20
>  	for (i =3D 0; i < count;) {
>  		val =3D cxl_afu_cr_read64(afu, cr->cr, off & ~0x7);