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SubjectRe: [PATCH v2 2/5] staging: r8188eu: cast to restricted __be32
On Thu, Aug 19, 2021 at 01:47:54PM +0530, Aakash Hemadri wrote:
> Fix sparse warning:
> > rtw_br_ext.c:836:54: warning: cast to restricted __be32
>
> Unnecessary double cast, remove them.
>
> Signed-off-by: Aakash Hemadri <aakashhemadri123@gmail.com>
> ---
> drivers/staging/r8188eu/core/rtw_br_ext.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/r8188eu/core/rtw_br_ext.c b/drivers/staging/r8188eu/core/rtw_br_ext.c
> index 404fa8904e47..6a0462ce6230 100644
> --- a/drivers/staging/r8188eu/core/rtw_br_ext.c
> +++ b/drivers/staging/r8188eu/core/rtw_br_ext.c
> @@ -671,7 +671,7 @@ void dhcp_flag_bcast(struct adapter *priv, struct sk_buff *skb)
> (udph->dest == __constant_htons(SERVER_PORT))) { /* DHCP request */
> struct dhcpMessage *dhcph =
> (struct dhcpMessage *)((size_t)udph + sizeof(struct udphdr));
> - u32 cookie = be32_to_cpu((__be32)dhcph->cookie);
> + u32 cookie = dhcph->cookie;

Wait, what? The cookie was in big endian format, and now you just
ignore it? Why is this ok? This breaks the code, have you tested this?

thanks,

greg k-h

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