| Message ID | 20240814195823.437597-3-krzysztof.kozlowski@linaro.org (mailing list archive) |
|---|---|
| State | Mainlined, archived |
| Headers | show |
| Series | [1/3] thermal: of: Fix OF node leak in thermal_of_trips_init() error path | expand |
On Wed, Aug 14, 2024 at 09:58:23PM +0200, Krzysztof Kozlowski wrote: > Terminating for_each_available_child_of_node() loop requires dropping OF > node reference, so bailing out on errors misses this. Solve the OF node > reference leak with scoped for_each_available_child_of_node_scoped(). > > Fixes: 3fd6d6e2b4e8 ("thermal/of: Rework the thermal device tree initialization") > Cc: <stable@vger.kernel.org> > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: Chen-Yu Tsai <wenst@chromium.org> > --- > drivers/thermal/thermal_of.c | 13 +++++++------ > 1 file changed, 7 insertions(+), 6 deletions(-) > > diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c > index b08a9b64718d..1f252692815a 100644 > --- a/drivers/thermal/thermal_of.c > +++ b/drivers/thermal/thermal_of.c > @@ -184,14 +184,14 @@ static struct device_node *of_thermal_zone_find(struct device_node *sensor, int > * Search for each thermal zone, a defined sensor > * corresponding to the one passed as parameter > */ > - for_each_available_child_of_node(np, tz) { > + for_each_available_child_of_node_scoped(np, child) { > > int count, i; > > - count = of_count_phandle_with_args(tz, "thermal-sensors", > + count = of_count_phandle_with_args(child, "thermal-sensors", > "#thermal-sensor-cells"); > if (count <= 0) { > - pr_err("%pOFn: missing thermal sensor\n", tz); > + pr_err("%pOFn: missing thermal sensor\n", child); > tz = ERR_PTR(-EINVAL); > goto out; > } > @@ -200,18 +200,19 @@ static struct device_node *of_thermal_zone_find(struct device_node *sensor, int > > int ret; > > - ret = of_parse_phandle_with_args(tz, "thermal-sensors", > + ret = of_parse_phandle_with_args(child, "thermal-sensors", > "#thermal-sensor-cells", > i, &sensor_specs); > if (ret < 0) { > - pr_err("%pOFn: Failed to read thermal-sensors cells: %d\n", tz, ret); > + pr_err("%pOFn: Failed to read thermal-sensors cells: %d\n", child, ret); > tz = ERR_PTR(ret); > goto out; > } > > if ((sensor == sensor_specs.np) && id == (sensor_specs.args_count ? > sensor_specs.args[0] : 0)) { > - pr_debug("sensor %pOFn id=%d belongs to %pOFn\n", sensor, id, tz); > + pr_debug("sensor %pOFn id=%d belongs to %pOFn\n", sensor, id, child); > + tz = no_free_ptr(child); > goto out; > } > } > -- > 2.43.0 >
On 14/08/2024 21:58, Krzysztof Kozlowski wrote: > Terminating for_each_available_child_of_node() loop requires dropping OF > node reference, so bailing out on errors misses this. Solve the OF node > reference leak with scoped for_each_available_child_of_node_scoped(). > > Fixes: 3fd6d6e2b4e8 ("thermal/of: Rework the thermal device tree initialization") > Cc: <stable@vger.kernel.org> > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org>
On Thu, Aug 22, 2024 at 6:12 PM Daniel Lezcano <daniel.lezcano@linaro.org> wrote: > > On 14/08/2024 21:58, Krzysztof Kozlowski wrote: > > Terminating for_each_available_child_of_node() loop requires dropping OF > > node reference, so bailing out on errors misses this. Solve the OF node > > reference leak with scoped for_each_available_child_of_node_scoped(). > > > > Fixes: 3fd6d6e2b4e8 ("thermal/of: Rework the thermal device tree initialization") > > Cc: <stable@vger.kernel.org> > > Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> > > Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Applied along with the rest of the series as fixes for 6.11-rc, thanks!
diff --git a/drivers/thermal/thermal_of.c b/drivers/thermal/thermal_of.c index b08a9b64718d..1f252692815a 100644 --- a/drivers/thermal/thermal_of.c +++ b/drivers/thermal/thermal_of.c @@ -184,14 +184,14 @@ static struct device_node *of_thermal_zone_find(struct device_node *sensor, int * Search for each thermal zone, a defined sensor * corresponding to the one passed as parameter */ - for_each_available_child_of_node(np, tz) { + for_each_available_child_of_node_scoped(np, child) { int count, i; - count = of_count_phandle_with_args(tz, "thermal-sensors", + count = of_count_phandle_with_args(child, "thermal-sensors", "#thermal-sensor-cells"); if (count <= 0) { - pr_err("%pOFn: missing thermal sensor\n", tz); + pr_err("%pOFn: missing thermal sensor\n", child); tz = ERR_PTR(-EINVAL); goto out; } @@ -200,18 +200,19 @@ static struct device_node *of_thermal_zone_find(struct device_node *sensor, int int ret; - ret = of_parse_phandle_with_args(tz, "thermal-sensors", + ret = of_parse_phandle_with_args(child, "thermal-sensors", "#thermal-sensor-cells", i, &sensor_specs); if (ret < 0) { - pr_err("%pOFn: Failed to read thermal-sensors cells: %d\n", tz, ret); + pr_err("%pOFn: Failed to read thermal-sensors cells: %d\n", child, ret); tz = ERR_PTR(ret); goto out; } if ((sensor == sensor_specs.np) && id == (sensor_specs.args_count ? sensor_specs.args[0] : 0)) { - pr_debug("sensor %pOFn id=%d belongs to %pOFn\n", sensor, id, tz); + pr_debug("sensor %pOFn id=%d belongs to %pOFn\n", sensor, id, child); + tz = no_free_ptr(child); goto out; } }
Terminating for_each_available_child_of_node() loop requires dropping OF node reference, so bailing out on errors misses this. Solve the OF node reference leak with scoped for_each_available_child_of_node_scoped(). Fixes: 3fd6d6e2b4e8 ("thermal/of: Rework the thermal device tree initialization") Cc: <stable@vger.kernel.org> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> --- drivers/thermal/thermal_of.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-)