armada380_init_sensor() is never called in atomic context.
armada380_init_sensor() is set as ".init_sensor" in
struct armada_thermal_data.
".init_sensor" is called armada_thermal_probe().
armada_thermal_probe() is set as ".probe" in struct platform_driver.
This function is not called in atomic context.
Despite never getting called from atomic context, armada380_init_sensor()
calls mdelay() to busily wait.
This is not necessary and can be replaced with usleep_range() to
avoid busy waiting.
This is found by a static analysis tool named DCNS written by myself.
And I also manually check it.
Signed-off-by: Jia-Ju Bai <baijiaju1...@gmail.com>
---
drivers/thermal/armada_thermal.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/thermal/armada_thermal.c b/drivers/thermal/armada_thermal.c
index ae75328..c289ae4 100644
--- a/drivers/thermal/armada_thermal.c
+++ b/drivers/thermal/armada_thermal.c
@@ -143,7 +143,7 @@ static void armada380_init_sensor(struct platform_device
*pdev,
if (!(reg & A380_HW_RESET)) {
reg |= A380_HW_RESET;
writel(reg, priv->control);
- mdelay(10);
+ usleep_range(10000, 11000);
}
}
--
1.9.1
