@@ -116,9 +116,9 @@ struct lvts_ctrl_data {
((s2) ? BIT(2) : 0) | \
((s3) ? BIT(3) : 0))
-#define lvts_for_each_valid_sensor(i, lvts_ctrl_data) \
+#define lvts_for_each_valid_sensor(i, lvts_ctrl) \
for ((i) = 0; (i) < LVTS_SENSOR_MAX; (i)++) \
- if (!((lvts_ctrl_data)->valid_sensor_mask & BIT(i))) \
+ if (!((lvts_ctrl)->valid_sensor_mask & BIT(i))) \
continue; \
else
@@ -145,6 +145,7 @@ struct lvts_ctrl {
const struct lvts_data *lvts_data;
u32 calibration[LVTS_SENSOR_MAX];
u32 hw_tshut_raw_temp;
+ u8 valid_sensor_mask;
int mode;
void __iomem *base;
int low_thresh;
@@ -356,7 +357,7 @@ static bool lvts_should_update_thresh(struct lvts_ctrl *lvts_ctrl, int high)
if (high > lvts_ctrl->high_thresh)
return true;
- lvts_for_each_valid_sensor(i, lvts_ctrl->lvts_data->lvts_ctrl)
+ lvts_for_each_valid_sensor(i, lvts_ctrl)
if (lvts_ctrl->sensors[i].high_thresh == lvts_ctrl->high_thresh
&& lvts_ctrl->sensors[i].low_thresh == lvts_ctrl->low_thresh)
return false;
@@ -617,6 +618,8 @@ static int lvts_sensor_init(struct device *dev, struct lvts_ctrl *lvts_ctrl,
lvts_sensor[i].high_thresh = INT_MIN;
};
+ lvts_ctrl->valid_sensor_mask = lvts_ctrl_data->valid_sensor_mask;
+
return 0;
}
@@ -1112,7 +1115,7 @@ static int lvts_ctrl_start(struct device *dev, struct lvts_ctrl *lvts_ctrl)
u32 *sensor_bitmap = lvts_ctrl->mode == LVTS_MSR_IMMEDIATE_MODE ?
sensor_imm_bitmap : sensor_filt_bitmap;
- lvts_for_each_valid_sensor(i, lvts_ctrl->lvts_data->lvts_ctrl) {
+ lvts_for_each_valid_sensor(i, lvts_ctrl) {
int dt_id = lvts_sensors[i].dt_id;
The following commit has been merged into the thermal/fixes branch of thermal: Commit-ID: b66c079aabdff3954e93fdd7f52bd8f9ad6482c7 Gitweb: https://git.kernel.org/pub/scm/linux/kernel/git/thermal/linux.git//b66c079aabdff3954e93fdd7f52bd8f9ad6482c7 Author: Julien Panis <jpanis@baylibre.com> AuthorDate: Fri, 03 May 2024 17:35:14 +02:00 Committer: Daniel Lezcano <daniel.lezcano@linaro.org> CommitterDate: Mon, 06 May 2024 10:33:26 +02:00 thermal/drivers/mediatek/lvts_thermal: Fix wrong lvts_ctrl index In 'lvts_should_update_thresh()' and 'lvts_ctrl_start()' functions, the parameter passed to 'lvts_for_each_valid_sensor()' macro is always 'lvts_ctrl->lvts_data->lvts_ctrl'. In other words, the array index 0 is systematically passed as 'struct lvts_ctrl_data' type item, even when another item should be consumed instead. Hence, the 'valid_sensor_mask' value which is selected can be wrong because unrelated to the 'struct lvts_ctrl_data' type item that should be used. Hence, some thermal zone can be registered for a sensor 'i' that does not actually exist. Because of the invalid address used as 'lvts_sensor[i].msr', this situation ends up with a crash in 'lvts_get_temp()' function, where this 'msr' pointer is passed to 'readl_poll_timeout()' function. The following message is output: "Unable to handle kernel NULL pointer dereference at virtual address <msr>", with <msr> = 0. This patch fixes the issue. Fixes: 11e6f4c31447 ("thermal/drivers/mediatek/lvts_thermal: Allow early empty sensor slots") Signed-off-by: Julien Panis <jpanis@baylibre.com> Reviewed-by: Nicolas Pitre <npitre@baylibre.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20240503-mtk-thermal-lvts-ctrl-idx-fix-v1-2-f605c50ca117@baylibre.com --- drivers/thermal/mediatek/lvts_thermal.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)