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SubjectRe: [PATCH v2 4/5] staging: r8188eu: restricted __be16 degrades to int
On Thu, Aug 19, 2021 at 01:47:56PM +0530, Aakash Hemadri wrote:
> Fix sparse warning:
> > rtw_br_ext.c:839:70: warning: restricted __be16 degrades to integer
> > rtw_br_ext.c:845:70: warning: invalid assignment: |=
> > rtw_br_ext.c:845:70: left side has type unsigned short
> > rtw_br_ext.c:845:70: right side has type restricted __be16
>
> dhcp->flag is u16, remove htons() as __be16 degrades.

Um, are you sure?

>
> Signed-off-by: Aakash Hemadri <aakashhemadri123@gmail.com>
> ---
> drivers/staging/r8188eu/core/rtw_br_ext.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/staging/r8188eu/core/rtw_br_ext.c b/drivers/staging/r8188eu/core/rtw_br_ext.c
> index d4acf02ca64f..14b2935cab98 100644
> --- a/drivers/staging/r8188eu/core/rtw_br_ext.c
> +++ b/drivers/staging/r8188eu/core/rtw_br_ext.c
> @@ -674,13 +674,13 @@ void dhcp_flag_bcast(struct adapter *priv, struct sk_buff *skb)
> u32 cookie = dhcph->cookie;
>
> if (cookie == DHCP_MAGIC) { /* match magic word */
> - if (!(dhcph->flags & htons(BROADCAST_FLAG))) {
> + if (!(dhcph->flags & BROADCAST_FLAG)) {

So you now just ignore the fact that the code used to properly check
BROADCAST_FLAG being in big endian mode, and now you assume it is native
endian?

Why is this ok? Did you test this?

thanks,

greg k-h

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