linux-kernel - Re: [PATCH] staging/ks7010: Fix type assignment for struct hostif

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Message-ID: <20170501161130.4302156b@gapa-Lenovo-IdeaPad-Y580>
Date:   Mon, 1 May 2017 16:11:30 +0200
From:   gapalinux <gapalinux@...il.com>
To:     "Tobin C. Harding" <me@...in.cc>
Cc:     gregkh@...uxfoundation.org, wsa@...-dreams.de,
        karniksayli1995@...il.com, shiva@...ev.nl, bhumirks@...il.com,
        mattkilgore12@...il.com, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging/ks7010: Fix type assignment for struct
 hostif_hdr

On Mon, 1 May 2017 19:59:44 +1000
"Tobin C. Harding" <me@...in.cc> wrote:

> On Sat, Apr 29, 2017 at 07:54:30PM +0200, Cezary Gapinski wrote:
> > Sparse spits out a warnings about __le16 and unsigned short
> > assignment. Change the type of size and event members of struct
> > hostif_hdr to __le16 and correct conversion to the proper cpu type.
> > 
> > Signed-off-by: Cezary Gapinski <gapalinux@...il.com>  
> 
> After discussion on kernelnewbies mailing list and thinking about this
> for a couple of days I am now of the opinion that this patch is
> merge-able. I am probably not fully qualified to say so but no one
> else appears to be super active on this driver. If I am wrong, I'll be
> here to fix it up :)
> 
>  Reviewed-by: Tobin C. Harding <me@...in.cc>
> 
> Good work Cezsary, apologies for the wish-washy replies. I'm learning
> also ;)
> 
> Good luck,
> Tobin.

Hi Tobin,

nice to know that you also thinking about this fixes. I think that is
just a first step because I noticed much more warning with
big/little-endian issues and perhaps no one else want to touch this.
I'm also here to help if it is something will be incorrect ;)."

Sorry for my previous messages. Sometimes I forget about crtl+s will
sending my e-mails, so if you received other messages just ignore it.

> > ---
> >  drivers/staging/ks7010/ks7010_sdio.c | 10 ++++++----
> >  drivers/staging/ks7010/ks_hostif.h   |  4 ++--
> >  2 files changed, 8 insertions(+), 6 deletions(-)
> > 
> > diff --git a/drivers/staging/ks7010/ks7010_sdio.c
> > b/drivers/staging/ks7010/ks7010_sdio.c index ec11799..e3a134d 100644
> > --- a/drivers/staging/ks7010/ks7010_sdio.c
> > +++ b/drivers/staging/ks7010/ks7010_sdio.c
> > @@ -269,7 +269,8 @@ static int write_to_device(struct
> > ks_wlan_private *priv, unsigned char *buffer, hdr = (struct
> > hostif_hdr *)buffer; 
> >  	DPRINTK(4, "size=%d\n", hdr->size);
> > -	if (hdr->event < HIF_DATA_REQ || HIF_REQ_MAX < hdr->event)
> > {
> > +	if (le16_to_cpu(hdr->event) < HIF_DATA_REQ ||
> > +	    le16_to_cpu(hdr->event) > HIF_REQ_MAX) {
> >  		DPRINTK(1, "unknown event=%04X\n", hdr->event);
> >  		return 0;
> >  	}
> > @@ -327,13 +328,14 @@ int ks_wlan_hw_tx(struct ks_wlan_private
> > *priv, void *p, unsigned long size, 
> >  	hdr = (struct hostif_hdr *)p;
> >  
> > -	if (hdr->event < HIF_DATA_REQ || HIF_REQ_MAX < hdr->event)
> > {
> > +	if (le16_to_cpu(hdr->event) < HIF_DATA_REQ ||
> > +	    le16_to_cpu(hdr->event) > HIF_REQ_MAX) {
> >  		DPRINTK(1, "unknown event=%04X\n", hdr->event);
> >  		return 0;
> >  	}
> >  
> >  	/* add event to hostt buffer */
> > -	priv->hostt.buff[priv->hostt.qtail] = hdr->event;
> > +	priv->hostt.buff[priv->hostt.qtail] =
> > le16_to_cpu(hdr->event); priv->hostt.qtail = (priv->hostt.qtail +
> > 1) % SME_EVENT_BUFF_SIZE; 
> >  	DPRINTK(4, "event=%04X\n", hdr->event);
> > @@ -403,7 +405,7 @@ static void ks_wlan_hw_rx(struct
> > ks_wlan_private *priv, uint16_t size) 
> >  	hdr = (struct hostif_hdr *)&rx_buffer->data[0];
> >  	rx_buffer->size = le16_to_cpu(hdr->size) +
> > sizeof(hdr->size);
> > -	event = hdr->event;
> > +	event = le16_to_cpu(hdr->event);
> >  	inc_rxqtail(priv);
> >  
> >  	ret = ks7010_sdio_writeb(priv, READ_STATUS,
> > REG_STATUS_IDLE); diff --git a/drivers/staging/ks7010/ks_hostif.h
> > b/drivers/staging/ks7010/ks_hostif.h index d773432..7e4d1aa 100644
> > --- a/drivers/staging/ks7010/ks_hostif.h
> > +++ b/drivers/staging/ks7010/ks_hostif.h
> > @@ -62,8 +62,8 @@
> >   */
> >  
> >  struct hostif_hdr {
> > -	u16 size;
> > -	u16 event;
> > +	__le16 size;
> > +	__le16 event;
> >  } __packed;
> >  
> >  struct hostif_data_request_t {
> > -- 
> > 2.7.4
> >