linux-kernel - Re: [PATCH] staging: r8188eu: remove unused members of struct xmit

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Message-ID: <20200713131607.GR2549@kadam>
Date:   Mon, 13 Jul 2020 16:16:07 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Ivan Safonov <insafonov@...il.com>
Cc:     Larry Finger <Larry.Finger@...inger.net>,
        devel@...verdev.osuosl.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org,
        Nishka Dasgupta <nishkadg.linux@...il.com>,
        Soumyajit Deb <debsoumyajit100@...il.com>
Subject: Re: [PATCH] staging: r8188eu: remove unused members of struct
 xmit_buf

On Sun, Jul 12, 2020 at 03:38:21PM +0300, Ivan Safonov wrote:
> Remove unused members of struct xmit_buf: alloc_sz, ff_hwaddr,
> dma_transfer_addr, bpending and last.
> 
> Signed-off-by: Ivan Safonov <insafonov@...il.com>
> ---
>  drivers/staging/rtl8188eu/include/rtw_xmit.h  | 5 -----
>  drivers/staging/rtl8188eu/os_dep/xmit_linux.c | 1 -
>  2 files changed, 6 deletions(-)
> 
> diff --git a/drivers/staging/rtl8188eu/include/rtw_xmit.h b/drivers/staging/rtl8188eu/include/rtw_xmit.h
> index 12d16e98176a..3c03987c81a1 100644
> --- a/drivers/staging/rtl8188eu/include/rtw_xmit.h
> +++ b/drivers/staging/rtl8188eu/include/rtw_xmit.h
> @@ -193,14 +193,9 @@ struct xmit_buf {
>  	void *priv_data;
>  	u16 ext_tag; /*  0: Normal xmitbuf, 1: extension xmitbuf. */
>  	u16 flags;
> -	u32 alloc_sz;
>  	u32  len;
>  	struct submit_ctx *sctx;
> -	u32	ff_hwaddr;
>  	struct urb *pxmit_urb[8];
> -	dma_addr_t dma_transfer_addr;	/* (in) dma addr for transfer_buffer */
> -	u8 bpending[8];
> -	int last[8];
>  };
>  
>  struct xmit_frame {
> diff --git a/drivers/staging/rtl8188eu/os_dep/xmit_linux.c b/drivers/staging/rtl8188eu/os_dep/xmit_linux.c
> index 017e1d628461..61ced1160951 100644
> --- a/drivers/staging/rtl8188eu/os_dep/xmit_linux.c
> +++ b/drivers/staging/rtl8188eu/os_dep/xmit_linux.c
> @@ -24,7 +24,6 @@ int rtw_os_xmit_resource_alloc(struct adapter *padapter,
>  		return _FAIL;
>  
>  	pxmitbuf->pbuf = PTR_ALIGN(pxmitbuf->pallocated_buf, XMITBUF_ALIGN_SZ);

Not related to this patch but kmalloc always returns data which is at
least ARCH_KMALLOC_MINALIGN aligned which is never less than
XMITBUF_ALIGN_SZ (4) so this is a no-op.

> -	pxmitbuf->dma_transfer_addr = 0;

regards,
dan carpenter