thermal: intel: int340x: Fix temperature selection around 0 C

Since commit 7251b9e8a007 ("thermal/intel: Fix intel_tcc_get_temp() to
support negative CPU temperature"), intel_tcc_get_temp() can report
negative temperatures.

proc_thermal_get_zone_temp() still uses *temp as the current maximum and
as an implicit "no reading yet" marker. However, this breaks when a CPU
reports 0 C, because a subsequent negative reading can overwrite it.

Use bool temp_valid to track whether a valid temperature has been read.
Initialize *temp with the first valid reading and only update it with
warmer readings.

Fixes: 7251b9e8a007 ("thermal/intel: Fix intel_tcc_get_temp() to support negative CPU temperature")
Cc: 6.3+ <stable@vger.kernel.org> # 6.3+
Signed-off-by: Thorsten Blum <blum@kernel.org>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://patch.msgid.link/20260826153144.299746-3-blum@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

0 files changed, 0 insertions, 0 deletions