drivers/thermal/renesas/rzg3e: Fix signed integer overflow in temp_to_code()

The thermal core passes -INT_MAX/INT_MAX as low/high trip points, which
the driver then converts to code values for programming the registers:

numerator = (temp_mc - info->temp_d_mc) * (priv->trmval1 - priv->trmval0);

Although 'numerator' is defined as s64, the arithmetic is performed as int.
Because of this, the multiplication overflows for -INT_MAX and, because
temp_d_mc is negative, the subtraction overflows for INT_MAX.

To fix this, cast the temperature to s64, so that the arithmetic is
performed as s64.

Fixes: dc67521c20b7 ("thermal/drivers/renesas/rzg3e: Fix add thermal driver for the Renesas RZ/G3E SoC")
Signed-off-by: Ovidiu Panait <ovidiu.panait.rb@renesas.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@kernel.org>
Link: https://patch.msgid.link/20260916120003.87018-2-ovidiu.panait.rb@renesas.com

0 files changed, 0 insertions, 0 deletions