[PATCH 5.10 124/352] dt-bindings: thermal: correct thermal zone node name limit

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5.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>

commit 97e32381d0fc6c2602a767b0c46e15eb2b75971d upstream.

Linux kernel uses thermal zone node name during registering thermal
zones and has a hard-coded limit of 20 characters, including terminating
NUL byte.  The bindings expect node names to finish with '-thermal'
which is eight bytes long, thus we have only 11 characters for the reset
of the node name (thus 10 for the pattern after leading fixed character).

Reported-by: Rob Herring <robh@xxxxxxxxxx>
Closes: https://lore.kernel.org/all/CAL_JsqKogbT_4DPd1n94xqeHaU_J8ve5K09WOyVsRX3jxxUW3w@xxxxxxxxxxxxxx/
Fixes: 1202a442a31f ("dt-bindings: thermal: Add yaml bindings for thermal zones")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240702145248.47184-1-krzysztof.kozlowski@xxxxxxxxxx
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/thermal/thermal-zones.yaml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/thermal/thermal-zones.yaml b/Documentation/devicetree/bindings/thermal/thermal-zones.yaml
index 68398e7e8655..606b80965a44 100644
--- a/Documentation/devicetree/bindings/thermal/thermal-zones.yaml
+++ b/Documentation/devicetree/bindings/thermal/thermal-zones.yaml
@@ -49,7 +49,10 @@ properties:
       to take when the temperature crosses those thresholds.
 
 patternProperties:
-  "^[a-zA-Z][a-zA-Z0-9\\-]{1,12}-thermal$":
+  # Node name is limited in size due to Linux kernel requirements - 19
+  # characters in total (see THERMAL_NAME_LENGTH, including terminating NUL
+  # byte):
+  "^[a-zA-Z][a-zA-Z0-9\\-]{1,10}-thermal$":
     type: object
     description:
       Each thermal zone node contains information about how frequently it
-- 
2.45.2







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