leds: Change led_trigger_blink[_oneshot]() delay parameters to pass-by-value

led_blink_set[_oneshot]()'s delay_on and delay_off function parameters
are pass by reference, so that hw-blink implementations can report
back the actual achieved delays when the values have been rounded
to something the hw supports.

This is really only interesting for the sysfs API / the timer trigger.
Other triggers don't really care about this and none of the callers of
led_trigger_blink[_oneshot]() do anything with the returned delay values.

Change the led_trigger_blink[_oneshot]() delay parameters to pass-by-value,
there are 2 reasons for this:

1. led_cdev->blink_set() may sleep, while led_trigger_blink() may not.
So on hw where led_cdev->blink_set() sleeps the call needs to be deferred
to a workqueue, in which case the actual achieved delays are unknown
(this is a preparation patch for the deferring).

2. Since the callers don't care about the actual achieved delays, allowing
callers to directly pass a value leads to simpler code for most callers.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Tested-by: Yauhen Kharuzhy <jekhor@gmail.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: Florian Westphal <fw@strlen.de>
Link: https://lore.kernel.org/r/20230510162234.291439-2-hdegoede@redhat.com
Signed-off-by: Lee Jones <lee@kernel.org>

1 files changed, 2 insertions, 6 deletions

diff --git a/drivers/net/arcnet/arcnet.c b/drivers/net/arcnet/arcnet.c
index 1bad1866ae46..99265667538c 100644
--- a/drivers/net/arcnet/arcnet.c
+++ b/drivers/net/arcnet/arcnet.c
@@ -196,13 +196,10 @@ static void arcnet_dump_packet(struct net_device *dev, int bufnum,
 void arcnet_led_event(struct net_device *dev, enum arcnet_led_event event)
 {
 	struct arcnet_local *lp = netdev_priv(dev);
-	unsigned long led_delay = 350;
-	unsigned long tx_delay = 50;
 
 	switch (event) {
 	case ARCNET_LED_EVENT_RECON:
-		led_trigger_blink_oneshot(lp->recon_led_trig,
-					  &led_delay, &led_delay, 0);
+		led_trigger_blink_oneshot(lp->recon_led_trig, 350, 350, 0);
 		break;
 	case ARCNET_LED_EVENT_OPEN:
 		led_trigger_event(lp->tx_led_trig, LED_OFF);
@@ -213,8 +210,7 @@ void arcnet_led_event(struct net_device *dev, enum arcnet_led_event event)
 		led_trigger_event(lp->recon_led_trig, LED_OFF);
 		break;
 	case ARCNET_LED_EVENT_TX:
-		led_trigger_blink_oneshot(lp->tx_led_trig,
-					  &tx_delay, &tx_delay, 0);
+		led_trigger_blink_oneshot(lp->tx_led_trig, 50, 50, 0);
 		break;
 	}
 }