linux-kernel - Re: [PATCH] staging: r8188eu: Fix return type of rtw_xmit

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Message-ID: <CA+sZ8B8RStBhofQ0=vvzH5FeQ66fj90DdCj9EQSaVErbVPLi7g@mail.gmail.com>
Date:   Tue, 13 Sep 2022 08:32:32 +0200
From:   Nam Cao <namcaov@...il.com>
To:     Nathan Huckleberry <nhuck@...gle.com>
Cc:     Dan Carpenter <error27@...il.com>, llvm@...ts.linux.dev,
        Larry Finger <Larry.Finger@...inger.net>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Pavel Skripkin <paskripkin@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Tom Rix <trix@...hat.com>, Ivan Safonov <insafonov@...il.com>,
        Saurav Girepunje <saurav.girepunje@...il.com>,
        Vihas Makwana <makvihas@...il.com>,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: r8188eu: Fix return type of rtw_xmit_entry

On Mon, Sep 12, 2022 at 11:45 PM Nathan Huckleberry <nhuck@...gle.com> wrote:
>
> The ndo_start_xmit field in net_device_ops is expected to be of type
> netdev_tx_t (*ndo_start_xmit)(struct sk_buff *skb, struct net_device *dev).
>
> The mismatched return type breaks forward edge kCFI since the underlying
> function definition does not match the function hook definition.
>
> The return type of rtw_xmit_entry should be changed from int to
> netdev_tx_t.
>
> Reported-by: Dan Carpenter <error27@...il.com>
> Link: https://github.com/ClangBuiltLinux/linux/issues/1703
> Cc: llvm@...ts.linux.dev
> Signed-off-by: Nathan Huckleberry <nhuck@...gle.com>

I am unable to apply your patch. I think because of this:
3e0a6c4414ac ("staging: r8188eu: remove os_dep/xmit_linux.c").

Can you update your git repo and resubmit?

Best regards,
Nam