From: Sean Young <sean@mess.org>
To: linux-media@vger.kernel.org, Sean Young <sean@mess.org>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Neil Armstrong <neil.armstrong@linaro.org>,
Kevin Hilman <khilman@baylibre.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
Viktor Prutyanov <viktor.prutyanov@phystech.edu>
Cc: Rik van Riel <riel@surriel.com>,
stable@vger.kernel.org,
Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH v5 20/20] media: meson-ir-tx: Prevent divide by zero in meson_irtx_prepare_pulse()
Date: Tue, 15 Sep 2026 09:32:30 +0100 [thread overview]
Message-ID: <662a613d00359191d9debce0b5a53019070a5e44.1789460680.git.sean@mess.org> (raw)
In-Reply-To: <cover.1789460680.git.sean@mess.org>
If an excesively high carrier is set, meson_irtx_prepare_pulse() will
cause a divide by zero if tb_us is 0. Prevent such a carrier from being
set.
Fixes: 49be1c78d575 ("media: rc: introduce Meson IR TX driver")
Signed-off-by: Sean Young <sean@mess.org>
Cc: stable@vger.kernel.org
---
drivers/media/rc/meson-ir-tx.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/media/rc/meson-ir-tx.c b/drivers/media/rc/meson-ir-tx.c
index 1ab898069e67..a0d07da09f67 100644
--- a/drivers/media/rc/meson-ir-tx.c
+++ b/drivers/media/rc/meson-ir-tx.c
@@ -219,6 +219,9 @@ static int meson_irtx_set_carrier(struct rc_dev *rc, u32 carrier)
if (carrier == 0)
return -EINVAL;
+ if (!DIV_ROUND_CLOSEST(USEC_PER_SEC, carrier))
+ return -EINVAL;
+
ir->carrier = carrier;
meson_irtx_set_mod(ir);
--
2.55.0
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parent reply other threads:[~2026-09-15 8:33 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <cover.1789460680.git.sean@mess.org>]
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