On Wed Sep 9 11:04:40 2026 +0100, Sean Young wrote:
> 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 <[email protected]>
> Cc: [email protected]
> Acked-by: Hans Verkuil <[email protected]>
Patch committed.
Thanks,
Sean Young
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);
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