linux-kernel - RE: [PATCH] rtw88: fix fw_fifo

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Date:   Wed, 14 Oct 2020 02:21:18 +0000
From:   Andy Huang <tehuang@...ltek.com>
To:     "'Nathan Chancellor'" <natechancellor@...il.com>,
        "trix@...hat.com" <trix@...hat.com>
CC:     Tony Chuang <yhchuang@...ltek.com>,
        "kvalo@...eaurora.org" <kvalo@...eaurora.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "ndesaulniers@...gle.com" <ndesaulniers@...gle.com>,
        "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "clang-built-linux@...glegroups.com" 
        <clang-built-linux@...glegroups.com>
Subject: RE: [PATCH] rtw88: fix fw_fifo_addr check


> On Sun, Oct 11, 2020 at 08:54:38AM -0700, trix@...hat.com wrote:
> > From: Tom Rix <trix@...hat.com>
> >
> > The clang build reports this warning
> >
> > fw.c:1485:21: warning: address of array 'rtwdev->chip->fw_fifo_addr'
> >   will always evaluate to 'true'
> >         if (!rtwdev->chip->fw_fifo_addr) {
> >
> > fw_fifo_addr is an array in rtw_chip_info so it is always nonzero.  A
> > better check is if the first element of the array is nonzero.  In the
> > cases where fw_fifo_addr is initialized by rtw88b and rtw88c, the
> > first array element is 0x780.
> >
> > Signed-off-by: Tom Rix <trix@...hat.com>
> 
> Reviewed-by: Nathan Chancellor <natechancellor@...il.com>
> 

Thanks for your fix,

Acked-by: Tzu-En Huang <tehuang@...ltek.com>

> > ---
> >  drivers/net/wireless/realtek/rtw88/fw.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/drivers/net/wireless/realtek/rtw88/fw.c
> > b/drivers/net/wireless/realtek/rtw88/fw.c
> > index 042015bc8055..b2fd87834f23 100644
> > --- a/drivers/net/wireless/realtek/rtw88/fw.c
> > +++ b/drivers/net/wireless/realtek/rtw88/fw.c
> > @@ -1482,7 +1482,7 @@ static bool rtw_fw_dump_check_size(struct
> > rtw_dev *rtwdev,  int rtw_fw_dump_fifo(struct rtw_dev *rtwdev, u8
> fifo_sel, u32 addr, u32 size,
> >  		     u32 *buffer)
> >  {
> > -	if (!rtwdev->chip->fw_fifo_addr) {
> > +	if (!rtwdev->chip->fw_fifo_addr[0]) {
> >  		rtw_dbg(rtwdev, RTW_DBG_FW, "chip not support dump fw fifo\n");
> >  		return -ENOTSUPP;
> >  	}
> > --
> > 2.18.1
> >
> 
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