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Date: Tue, 16 Apr 2024 13:56:38 +0300
From: Dan Carpenter <dan.carpenter@linaro.org>
To: Ricardo Ribalda <ribalda@chromium.org>
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Subject: Re: [PATCH 23/35] media: dvb-frontends: tda10048: Use the right div
Message-ID: <bb7d0078-764a-4cf9-9fcf-2e91eaf33e76@moroto.mountain>
References: <20240415-fix-cocci-v1-0-477afb23728b@chromium.org>
 <20240415-fix-cocci-v1-23-477afb23728b@chromium.org>
 <97f51ae8-6672-4bd4-b55b-f02114e3d8d0@moroto.mountain>
 <CANiDSCvp9gBo6Oh31GghvcHmgBY1cYqq4uM_njFTTvQOcS1mbw@mail.gmail.com>
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In-Reply-To: <CANiDSCvp9gBo6Oh31GghvcHmgBY1cYqq4uM_njFTTvQOcS1mbw@mail.gmail.com>

On Tue, Apr 16, 2024 at 12:39:33PM +0200, Ricardo Ribalda wrote:
> Hi Dan
> 
> What about going the safe way?
> 
> --- a/drivers/media/dvb-frontends/tda10048.c
> +++ b/drivers/media/dvb-frontends/tda10048.c
> @@ -341,7 +341,7 @@ static int tda10048_set_wref(struct dvb_frontend
> *fe, u32 sample_freq_hz,
>         /* t *= 2147483648 on 32bit platforms */
>         t *= (2048 * 1024);
>         t *= 1024;
> -       z = 7 * sample_freq_hz;
> +       z = (u64)7 * sample_freq_hz;

I think your patch works, but it might be nicer without the casts.  We
end up having the discussion where it's like "Can this hz be above 4GHz?"
And, here, I think we're safe but a lot of stuff is pushing up against
that limit these days...

regards,
dan carpenter