linux-kernel - Re: [PATCH 23/35] media: dvb-frontends: tda10048: Use the right div

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Date: Tue, 16 Apr 2024 13:56:38 +0300
From: Dan Carpenter <dan.carpenter@...aro.org>
To: Ricardo Ribalda <ribalda@...omium.org>
Cc: Martin Tuma <martin.tuma@...iteqautomotive.com>,
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Subject: Re: [PATCH 23/35] media: dvb-frontends: tda10048: Use the right div

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