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Message-Id: <20240419-fix-cocci-v2-26-2119e692309c@chromium.org>
Date: Fri, 19 Apr 2024 09:48:12 +0000
From: Ricardo Ribalda <ribalda@...omium.org>
To: Martin Tuma <martin.tuma@...iteqautomotive.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Hugues Fruchet <hugues.fruchet@...s.st.com>,
Alain Volmat <alain.volmat@...s.st.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Chen-Yu Tsai <wens@...e.org>, Jernej Skrabec <jernej.skrabec@...il.com>,
Samuel Holland <samuel@...lland.org>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>,
Sowjanya Komatineni <skomatineni@...dia.com>,
Luca Ceresoli <luca.ceresoli@...tlin.com>,
Matthias Brugger <matthias.bgg@...il.com>,
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Hans Verkuil <hverkuil@...all.nl>, Sergey Kozlov <serjk@...up.ru>,
Abylay Ospan <aospan@...up.ru>,
Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
Dmitry Osipenko <digetx@...il.com>,
Benjamin Mugnier <benjamin.mugnier@...s.st.com>,
Sylvain Petinot <sylvain.petinot@...s.st.com>,
Stanimir Varbanov <stanimir.k.varbanov@...il.com>,
Vikash Garodia <quic_vgarodia@...cinc.com>,
Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-stm32@...md-mailman.stormreply.com,
linux-arm-kernel@...ts.infradead.org, linux-staging@...ts.linux.dev,
linux-sunxi@...ts.linux.dev, linux-tegra@...r.kernel.org,
linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org,
Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH v2 26/26] media: dvb-frontends: tda10048: Make explicit the
range of z.
We do not expect the sample_freq to be over 613MHz.
Found by cocci:
drivers/media/dvb-frontends/tda10048.c:345:1-7: WARNING: do_div() does a 64-by-32 division, please consider using div64_u64 instead.
Signed-off-by: Ricardo Ribalda <ribalda@...omium.org>
---
drivers/media/dvb-frontends/tda10048.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/media/dvb-frontends/tda10048.c b/drivers/media/dvb-frontends/tda10048.c
index 3e725cdcc66b..1886f733dbbf 100644
--- a/drivers/media/dvb-frontends/tda10048.c
+++ b/drivers/media/dvb-frontends/tda10048.c
@@ -328,7 +328,8 @@ static int tda10048_set_wref(struct dvb_frontend *fe, u32 sample_freq_hz,
u32 bw)
{
struct tda10048_state *state = fe->demodulator_priv;
- u64 t, z;
+ u32 z;
+ u64 t;
dprintk(1, "%s()\n", __func__);
@@ -341,6 +342,7 @@ static int tda10048_set_wref(struct dvb_frontend *fe, u32 sample_freq_hz,
/* t *= 2147483648 on 32bit platforms */
t *= (2048 * 1024);
t *= 1024;
+ /* Sample frequency is under 613MHz */
z = 7 * sample_freq_hz;
do_div(t, z);
t += 5;
--
2.44.0.769.g3c40516874-goog
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