Hi! It seems quite clear:
static int timer_trig_activate(struct led_classdev *led_cdev)
{
printk("timer_trig_activate\n");
if (led_cdev->flags & LED_INIT_DEFAULT_TRIGGER) {
led_blink_set(led_cdev, &led_cdev->blink_delay_on,
&led_cdev->blink_delay_off);
printk("timer_trig_activate done\n");
return 0;
}
static void timer_trig_deactivate(struct led_classdev *led_cdev)
{
printk("timer_trig_deactivate\n");
/* Stop blinking */
led_set_brightness(led_cdev, LED_OFF);
printk("timer_trig_deactivate done\n");
}
We get timer_trig_deactivate() immediately followed by
timer_trig_activate().
set_brightness goes to workqueue because it would block. That means
that blink_set() happens before set_brightness...
Pavel
[ 16.194141] e1000e 0000:02:00.0 eth1: 10/100 speed: disabling TSO
[ 145.887931] timer_trig_activate
[ 145.888011] LED set 0 to 2
[ 145.888879] LED set 0 to 2... 0
[ 145.888893] timer_trig_activate done
[ 149.977138] timer_trig_deactivate
[ 149.977169] timer_trig_deactivate done
[ 149.977479] timer_trig_activate
[ 149.977497] LED set 0 to 2
[ 149.978281] LED set 0 to 2... 0
[ 149.978295] timer_trig_activate done
[ 149.978415] LED set 0 to 0
[ 149.979851] LED set 0 to 0... 0
[ 184.839252] timer_trig_deactivate
[ 184.839282] timer_trig_deactivate done
[ 184.839319] timer_trig_activate
[ 184.839337] LED set 0 to 2
[ 184.839907] LED set 0 to 0
[ 184.840369] LED set 0 to 2... 0
[ 184.840383] timer_trig_activate done
[ 184.843318] LED set 0 to 0... 0
root@amd:/sys/class/leds/tpacpi::power#
diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c
index e3da7c0..ca1f69b 100644
--- a/drivers/leds/led-core.c
+++ b/drivers/leds/led-core.c
@@ -166,6 +166,7 @@ static void led_blink_setup(struct led_classdev *led_cdev,
{
if (!test_bit(LED_BLINK_ONESHOT, &led_cdev->work_flags) &&
led_cdev->blink_set &&
+ /* This can sleep */
!led_cdev->blink_set(led_cdev, delay_on, delay_off))
return;
diff --git a/drivers/leds/trigger/ledtrig-timer.c
b/drivers/leds/trigger/ledtrig-timer.c
index ca898c1..0b061bb5 100644
--- a/drivers/leds/trigger/ledtrig-timer.c
+++ b/drivers/leds/trigger/ledtrig-timer.c
@@ -104,6 +104,7 @@ static void pattern_init(struct led_classdev *led_cdev)
static int timer_trig_activate(struct led_classdev *led_cdev)
{
+ printk("timer_trig_activate\n");
if (led_cdev->flags & LED_INIT_DEFAULT_TRIGGER) {
pattern_init(led_cdev);
/*
@@ -115,14 +116,18 @@ static int timer_trig_activate(struct led_classdev
*led_cdev)
led_blink_set(led_cdev, &led_cdev->blink_delay_on,
&led_cdev->blink_delay_off);
+ printk("timer_trig_activate done\n");
return 0;
}
static void timer_trig_deactivate(struct led_classdev *led_cdev)
{
+ printk("timer_trig_deactivate\n");
/* Stop blinking */
led_set_brightness(led_cdev, LED_OFF);
+
+ printk("timer_trig_deactivate done\n");
}
static struct led_trigger timer_led_trigger = {
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index 3a4402a..b3fa9c9 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -363,11 +363,11 @@ int mmc_of_parse_voltage(struct device_node *np, u32
*mask)
int num_ranges, i;
voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges);
- num_ranges = num_ranges / sizeof(*voltage_ranges) / 2;
if (!voltage_ranges) {
pr_debug("%pOF: voltage-ranges unspecified\n", np);
return 0;
}
+ num_ranges = num_ranges / sizeof(*voltage_ranges) / 2;
if (!num_ranges) {
pr_err("%pOF: voltage-ranges empty\n", np);
return -EINVAL;
diff --git a/drivers/platform/x86/thinkpad_acpi.c
b/drivers/platform/x86/thinkpad_acpi.c
index 57d9ae9..3ec6636 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -5867,6 +5867,8 @@ static int led_set_status(const unsigned int led,
int rc = 0;
+ printk("LED set %d to %d\n", led, ledstatus);
+
switch (led_supported) {
case TPACPI_LED_570:
/* 570 */
@@ -5876,7 +5878,7 @@ static int led_set_status(const unsigned int led,
return -EPERM;
if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
(1 << led), led_sled_arg1[ledstatus]))
- rc = -EIO;
+ return -EIO;
break;
case TPACPI_LED_OLD:
/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
@@ -5900,12 +5902,14 @@ static int led_set_status(const unsigned int led,
return -EPERM;
if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
led, led_led_arg1[ledstatus]))
- rc = -EIO;
+ return -EIO;
break;
default:
- rc = -ENXIO;
+ return -ENXIO;
}
+ printk("LED set %d to %d... %d\n", led, ledstatus, rc);
+
if (!rc)
tpacpi_led_state_cache[led] = ledstatus;
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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